MCMC  MTSFB TC T 009:2014 
 TECHNICAL CODE  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SPECIFICATION FOR   
INTEGRATED SERVICES DIGITAL NETWORK (ISDN)  
 USING PRIMARY RATE ACCESS   
 
First Revision  
 
 
 
 
 
 
 
 
 
 
 
 
 
Developed by   Registered by  
  
 
 
Registered  date: 18 December 2014  
 
 
© Copyright 2014  
MCMC  MTSFB TC T 009:2014 
i DEVELOPMENT OF TECHNICAL CODES   
 
 
The Communications and Multimedia Act 1998 (‘the Act’) provides for Technical Standards Forum 
designated under section 184 of the Act or the Malaysian Communications and Multimedia 
Commission (‘the Commission’) to prepar e a technical code. The technical code prepared pursuant to 
section 185 of the Act shall consist of, at least, the requirement for network interoperability and the 
promotion of safety of network facilities.  
 
Section 96 of the Act also provides for the Comm ission to determine a technical code in accordance 
with section 55 of the Act if the technical code is not developed under an applicable provision of the 
Act and it is unlikely to be developed by the Technical Standards Forum within a reasonable time.  
 
In exercise of the power conferred by section 184 of the Act, the Commission has designated the 
Malaysian Technical Standards Forum B erhad (‘MTSFB’) as a Technical Standards Forum which is 
obligated, among others, to prepare the technical code under section 1 85 of the Act.  
 
A technical code prepared in accordance with section 185 shall not be effective until it is registered by 
the Commission pursuant to section 95 of the Act.  
 
For further information on the technical code, please contact:  
 
Malaysian Communica tions and Multimedia Commission (MCMC)  
Off Persiaran Multimedia  
63000 Cyberjaya  
Selangor Darul Ehsan  
MALAYSIA  
 
Tel: +60 3 8688 8000  
Fax: +60 3 8688 1000  
http://www.skmm.gov.my  
 
OR 
 
Malaysian Technical Standards Forum Bhd (MTSFB ) 
4805 -2-2, Block 4805, Persiaran Flora   
CBD Perdana 2  
Cyber 12  
63000, Cyberjaya  
Selangor Darul Ehsan  
MALAYSIA  
 
Tel: +60 3 8322 1441/1551  
Fax: +60 3 8322 0115  
http://www.mtsfb.org.my  
 
 
 
 
 
 
  MCMC  MTSFB TC T 009:2014 
ii CONTENTS  
 
Committee Representation  ................................ ................................ ................................ ....................  iv 
Foreword   ................................ ................................ ................................ ................................ ..............  v 
 
Section   A 
Introduction ……………………………………………………………………………………………………….  1 
1. Scope  ................................ ................................ ................................ ................................ .... 1 
2. Normative references  ................................ ................................ ................................ ............  2 
3. Abbreviations ................................ ................................ ................................ .........................  2 
4. General requirements  ................................ ................................ ................................ ...........  3 
4.1 Design  of Equipment  ................................ ................................ ................................ .............  3 
4.2 Interface  ................................ ................................ ................................ ................................  4 
4.3 Interoperability  ................................ ................................ ................................ .......................  4 
5. Electromagnetic Compatibility & Electrical Safety Requirements  ................................ .........  4 
 
Section B  Primary Rate User -Network Interface – Layer 1 Specification  
(ITU-T Recommendation I.431 03/1993 & Amendment 1 06/1997)  ................................ .......................  5 
 
Section C  ISDN User -Network Interface – Data Link Layer  
(ITU-T Recommendation  Q.921 09/ 1997  & Amendment 1 06/2000)  ................................ .....................  7 
 
Section D   Network layer requirements based on EN 300 403 -1 11/99, Integrated Services Digital 
Network (ISDN): Digital Subscriber Signaling System No. One (DSS1) protocol: Signaling  network 
layer for circuit -mode basic call c ontrol; Part 1: Protocol Specification [ITU -T Recommendation Q.931 
(1993), modified].  ................................ ................................ ................................ ................................ .. 12 
1  Introduction  ................................ ................................ ................................ ..........................  12 
2  Supporting Informa tion ................................ ................................ ................................ .........  12 
3  National Option Selections and Clarifications  ................................ ................................ ..... 13 
4. Terminal Characteristics Related To Access Signaling  ................................ ......................  18 
5. Terminal Adaptors  ................................ ................................ ................................ ...............  18 
5.1 Circuit Mode Bearer Services  ................................ ................................ .............................  18 
 
 
 
 
 MCMC  MTSFB TC T 009:2014 
iii Tables  
 
1 Frame structure for peer -to-peer communication  ................................ ................................ . 7 
2   Elements of proced ure and formats of field for data link layer peer -to-peer 
communication ………………………………………………………………………………..  ....... 7 
3   Elements for layer-to-layer communica tion ................................ ................................ ...........  9 
4   Procedures  for use by the data link layer ................................ ................................ ..............  9 
5   Annexes  and Appendices  ................................ ................................ ................................ .... 10 
6  Appendices ................................ ................................ ................................ ..........................  13 
 
Figures  
1 Reference Configuration for Multiple Connections (Figure 1/I.412)  ................................ ...... 1 
2 Alphanumeric Keypad Layout (ITU -T Rec. E. 161) ................................ ...............................  4 
 
Annexes  
 
A Normative references  ................................ ................................ ................................ ..........  19 
B Technical  Guidelines  of ISDN S upplementary  Service  ................................ .......................  20 
C Addendum/Corrigendum  ................................ ................................ ................................ ..... 48 
  MCMC  MTSFB TC T 009:2014 
iv Committee Representation  
 
 
The Fixed Te rminal Working Group under the Malaysian Technical Standards Forum Bhd (MTSFB) 
which developed this Technical Code consists of representatives from the following organisations:  
 
NEC  Corporation of Malaysia Sdn. Bhd.  
SIRIM QAS International Sdn Bhd  
Telekom Malaysia Berhad  
TIME dotCom  Berhad  
 
 
 
 
  MCMC  MTSFB TC T 009:2014 
v FOREWO RD 
 
 
This technical code for the Specification for Integrated Services Digital Network (ISDN) using Primary 
Rate Access  (First Revision)  (‘this Technical Code’) was developed pursuant to section 185 of the Act 
588 by the Malaysian Tech nical Standards Forum Bhd (MTSFB)  via its Fixed Terminal Working 
Group.   
 
This Technical Code was developed for the purpose of certifying communications equipment under 
the Communications and Multimedia (Technical Standards) Regulations 2000.  
 
This Techni cal Code cancels and replaces Technical Specification for Connecting to the Integrated 
Services Digital Network (ISDN) using Primary Rate Access, SKMM FTS ISDN -PA Rev. 1.01:2007.   
 
This Technical Code shall continue to be valid and effective until reviewed  or cancelled.  
 
 
  MCMC  MTSFB TC T 009:2014 
vi  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
THIS PAGE IS INTENTI ONALLY LEFT BLANKMCMC  MTSFB TC T 009:2014 
1 
 
SPECIFICATION FOR INTERGRATED SERVICES DIGITAL NETWORK (ISDN) 
USING PRIMARY RATE ACCESS   
 
 
Section   A 
 
Introduction  
 
 
1. Scope  
 
1.1  This Specification identifies the minimum techni cal requirements for connecting to the 
Integrated Services Digital Network (ISDN) at the T interface, using Primary Rate Access (PRA).  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Figure 1.  Reference Configuration for Multiple Connections (Figure 1/I.412)  
 
1.2  The ISDN  PRA equipme nt connected  to the T interface (see Figure  1) shall have the 
Network Termination 2 ( NT2) functio n. Suppliers  shall demonstrate  that the equipm ent has 
been  tested  to comply  with the requirements  defined  in Section  A, B, C and D  of this Specification. 
 
Section  B – Physica l layer requirement s base d on ITU-T Rec. I.431, Primary  Rate User-
Networ k Interface  Laye r 1 Specification  
Section  C – Link Acces s Procedur e on the D-channel , LAPD based on ITU-T Rec. Q.92 1, ISDN 
User-Networ k Interfac e  Data Link Laye r Specification  
Section  D – Network layer requirements based on EN 300 403 -1 11/99, Integrated Services 
Digital Network (ISDN): Digital Subscriber Signaling System No.  One (DSS1) 
protocol: Signaling network layer for circuit -mode basic call contro l; Part 1: Protocol 
Specification [ITU -T Recommendation Q.931 (1993), modified].  
  MCMC  MTSFB TC T 009:2014 
2 
 2. Normative references  
 
The following normative references are indispensable for the application of this Specification. For 
dated references, only the edition ci ted applies. For undated references, the latest edition of the 
normative references (including any amendments) applies.  
 
See Annex A.  
 
3. Abbreviations  
 
The use of the term Terminal Equipment ( TE) within the Specificatio n refers to a Termi nal Equipme nt 
Type 1 (TE1), a Termin al Adaptor (TA) or a NT2.  
 
The followin g notation s are used in the Specificatio n: 
 
CR Conformance  Requiremen t define s features and function s that must be supported at 
minimum.  
M Mandator y requiremen t is wher e the TE impleme ntation shall confor m to those clause s in 
that sectio n relatin g to the operatio n of Laye r 1, Layer 2 and Layer 3 protoco l in the TE. 
O Optiona l requiremen t means it is optional whethe r TE implements tha t functio n but if 
functio n is impleme nted, it shall confor m to the clause s in that sectio n relatin g to the 
operation of the TE Layer 1, Laye r 2 and Layer 3 proto col. 
 
However , the use of optio nal function s is possibl e only if the networ k operator s have 
implemente d these option s in their networks.  
NA Not Applicabl e is where the requireme nts specifie d in that section o n the TE shall not be 
applicabl e for attachment.  
GID The sectio n provide s General Inform ation and Definition s. 
TE1 ISDN -capable terminal equipment e.g.: Digital phone and digital fax  
TE2 Non-ISDN equipmen t e.g: Analogue phone and the RS -232 serial port on computer  
TA Terminal adapter that interface s the TE2 devices with ISDN network  
NT1 Network terminator that reside s between telco’s network and customer equipment  
NT2 An intelligent device that can perf orm switching function e.g: PABX and Local  Area  
Network (LAN)  
  MCMC  MTSFB TC T 009:2014 
3 
 4.    General requirements  
 
4.1  Design  of Equipment  
 CR 
Powe r supply  a)  For AC powered TE, the operating voltage shall be rated/ 
marked at 230V or 240V in line with the country's nominal vo ltage 
and frequency in accordance to MS IEC 60038. If the product is 
rated with multiple or a range of voltages, voltage range between 
230V (+10%, -6%) shall be included. Testing shall be conducted 
based on 230V (+10%, -6%) or 240V and other relevant voltage s, 
if the product is marked with multiple or a range of voltages . 
 
b) Product shall be rated/ marked at 50Hz and testing shall be 
conducted at 50Hz. If the product is marked at 50/60Hz or 50 -
60Hz then testing shall be conducted either at 50Hz or 60Hz, 
whichever is more unfavorable . 
 
c) Where external power supply is used, e.g AC adaptor, it shall 
not affect the capacity of the equipment to meet this 
specification. Adaptor must be pre -approved by the relevant 
regulatory body before it can be used with the eq uipment.                                                                                                                                                          Note 1 
 Note  
i) Either one of these options shall be applied.  
  
Identificatio n of 
equipment  Equipme nt shall be marke d with: 
a) supplier’ s or manufacturer’ s name or identificatio n mark  M 
 b)  supplier’ s or manufacturer’ s mode l or type reference  M 
 The marking s shall be legible, indelibl e and readil y visible  M 
Keypa d Dialing   a) Keypad s used in equipm ent for dialing shall be alphanumeric 
keypad s and the relationship s betwee n the letters and the 
digits shall compl y with ITU-T Rec E.161 as shown in Figure 
2. M 
 b) The associa ted letters shall not impair the legibility of the 
digit (§ 3.1.1, ITU-T Rec. E.161).  M 
 c) The `tactile i dentifier on the  “5” button  shall be provi ded (§ 
3.6, ITU -T Rec. E.161).  M MCMC  MTSFB TC T 009:2014 
4 
 1 2 
ABC  3 
DEF 
   
   
4 
GHI 5 
JKL 6 
MNO  
   
   
7 
PQRS  8 
TUV 9 
WXYZ  
   
   
* 0 # 
 
 
Figure 2.  Alphanumeric Keypad Layout (ITU -T Rec. E.  161)  
  
4.2  Interface  
 
4.2.1  Network Interface   
 
Connector  - Coaxial cable or RJ45  
Line Coding  - HDB3  
Impedance  - 120Ω (RJ45) or 75Ω (coaxial cable)  
Framing  - Multi frame CRC  
Switch Type  - NET 5  
 
4.3  Interoperability  
 
TE1 and TA are dynamically i nteroperable if they implement a common and compatible set of features, 
functions and options and can demonstrate satisfactory mutual communication in a real network 
architecture environment as performance test conditions are varied and exercised. It is mandatory  that 
the TE1 and TA be tested with the respective Service Provider to ensure interoperability.  The general 
reference model for interoperability is shown in Figure 1.  
 
5.   Electromagnetic Compatibility & Electrical Safety Requirements  
 
5.1  The equipment shall comply with the limits  for conducted  disturba nce at the main  termi nals and 
telecommunication ports, a nd the limits for r adiated d isturba nce are defined in the IEC CISPR 22.  
 
5.2  The equip ment shall  comply with  the IEC 6095 0-1 safety sta ndard1. The requirem ents in IEC 
6095 0-1 that are applic able to the equip ment [e.g. class of equipment, type of teleco mmunication 
network voltage (TNV) c ircuit and types of  compo nents shall  be identified a nd compli ed with. 
  
                                                           
1 The safe ty standard in cludes, among ot hers, protection of  telecomm unications network service personnel and users of other 
equipment connec ted to the ne twork from haza rds in  the equ ipment. MCMC  MTSFB TC T 009:2014 
5 
 Section B  
 
Primary Rate User -Network In terface – Layer 1 Specification  
(ITU-T Recommendation I.431 03/1993 & Amendment 1 06/1997)  
 
Title ITU-T Rec. 
I.431  ETSI 
TBR 4  Remarks  
Introduc tion 1 - GID Support s user-networ k interface 
at 2048 kbit/s  
Type of configuration  2 - M Primar y rate access at the T 
referenc e point shall supp ort the 
point -to-point configuratio n only. 
Electrica l characteristic s are 
define d in ITU-T Rec. G.703. 
Function al characteris tics 3  M Heading  
Summa ry of fun ctions ( Layer 1) 3.1 – M – B-channe l (64 kbit/s)  
O – H0-channel  
O – H1-channel  
M – D-channe l (64 kbit/s)  
M – Bit timing  
M – Octet timing  
M – Fram e alignment  
O – Powe r feeding 
M – Maintenance  
M – CRC proced ure 
Interchang e circuits 3.2 – M Two interchang e circuit s, one for 
each directio n, are used for the 
transmissio n of digital signals 
Activation/deactivation  3.3 – M Active at all times 
Operation al functions  3.4 – M Heading  
Definition s of signal s at the 
interface 3.4.1  9.5.1  GID  
Definition s of state tables at 
network an d user sides 3.4.2  – GID  
Laye r 1 states on the user side 
of the interface 3.4.3  9.5.2  M  
Laye r 1 states at the network 
side of the interface 3.4.4  – NA Networ k side 
Defin ition of primitives  3.4.5  – M  
State tables  3.4.6  9.5.3  M Table 2/I.431 is applicable  
Interfac e at 1544 kbit/s 4 – NA  
 
  MCMC  MTSFB TC T 009:2014 
6 
  
Title ITU-T 
Rec. 
I.431  ETSITB
R 4 CR Remarks  
Interfac e at 2048 kbit/s 5 – – Heading  
Elect rical characteristics  5.1 9.2 
9.3 M a) 120   symmetrica l pair 
interface 
b) ITU-T Rec. G.703 section 6 
Fram e struc ture 5.2 9.4 M Note 1 
Timing considerations  5.3  M  
Jitter  5.4 9.3.3  M  
Tolera ble longitudinal voltage 5.5 9.3.4  M  
Output signal balance  5.6 – M f=1 MHz;  40 dB 
1 MHz < f  30 MHz; decreasing 
from 40 dB at 20 dB/decade  
Imped ance towards ground 5.7 9.2.2  
9.3.5  M 10 Hz < f  1 MHz; > 1000  
Interfac e procedures  5.8 9.5.5  M  
Maintenanc e at the interface  5.9 9.5.4  M On the user side 
Connector  6 – M ISO/IEC standards and 
permanen t wiring are permitted  
Interfac e wiring imped ance 7 – M 120  ± 20%, 200 kHz - 1 MHz  
120  ± 10%, 1 MHz 
Two symm etrical pair 
connection s shall be provided. 
No powe r feeding is available in 
eithe r directi on. 
Power feedin g to the NT 8 – O Provisi on of pow er us ing a 
separate pair  of wire s, is 
optional.  
Timeslo t assignmen t for interfaces 
havin g only H0 channels  Anne x 
A – Note 
2  
Timeslo t assignmen t for 2048 
kbits/s interface having H11 
chan nel Anne x 
B – Note 
3  
NOTES:  
i)   H-channel s may not be supporte d dependin g on local implement ation.  
ii)  ‘M’ if H0 channel s are supporte d. 
iii)  ‘M’ if H11 channel s are supported.  
iv)  The use of optio nal function s is possibl e only if the networ k operator s have impleme nted these option s in their networks.  
 MCMC  MTSFB TC T 009:2014 
7 
  
Section C  
 
ISDN User -Network Interface – Data Link Layer  
(ITU-T Recommandation  Q.921 09/ 1997  & Amendment 1 06/2000)  
 
 
Table 1.  Frame structure for peer -to-peer communication  
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remarks  
General  1 – GID  
Fram e struc ture for peer-to-peer 
commu nication 2 10.1 GID Heading  
General  2.1 10.1.1  M  
Flag seque nce 2.2 10.1.2  M  
Addres s field 2.3 10.1.3  M  
Contro l field 2.4 10.1.4  M  
Informa tion field 2.5 10.1.5  M  
Transparen cy 2.6 10.1.6  M  
FCS field 2.7 10.1.7  M  
Forma t convention  2.8 10.1.8  –  
Invalid frames 2.9 10.1.9  
Note  M  
Fram e abort  2.10 – M Not a TBR 4 requirement  
NOTE.  TBR 4 includes a frame, which contains a TEI that is not assigned to the TE as invalid.  
 
 
Table 2.  Elements of procedure and formats of field f or data link layer peer -to-peer 
communication  
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remark s 
Elements of procedur e and 
formats o f field for data link layer 
peer-to- peer communicati on 3 10.2 – Heading  
General  3.1 10.2.1  GID  
Addres s field format  3.2 10.2.2  M  
Addres s field variables  3.3 10.2.3  – Note 1 
 MCMC  MTSFB TC T 009:2014 
8 
 Table 2.  Elements of procedure and  formats of field for data link layer peer -to-peer 
communication (continued ) 
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remarks  
Contro l field formats  3.4 10.2.4  M  
Contro l field parameter s and 
associate d state variables 3.5 10.2.5  M  
Poll/Fin al (P/F) bit 3.5.1 10.2. 5.1 M  
Multipl e frame operatio n – 
variables an d sequenc e numbers  3.5.2  10.2. 5.2 M  
Unacknowle dged operatio n – 
variable s and parameters  3.5.3   GID One paramete r is defined, N201 
(see 5.9.3).  
Fram e types  3.6 10.2.6  – Heading  
Command s and response s 3.6.1  10.2. 6.1 
Note 3 M Refer to Table 5/Q.921 
Inform ation (I) command  3.6.2  10.2. 6.2 M  
Set Asynchronou s Balanc ed 
Mode Extende d (SABME ) 
comm and 3.6.3  10.2. 6.3 M  
Disconnec t (DISC ) command  3.6.4  10.2. 6.4 M  
Unnumbere d Inform ation (UI) 
command  3.6.5  10.2.6.5 M  
Recei ve Read y (RR) 
command/response  3.6.6  10.2. 6.6 M  
Rejec t (REJ ) command/response  3.6.7  10.2. 6.7 M  
Receiv e Not Read y (RNR) 
command/response  3.6.8  10.2. 6.8 M  
Unnumbere d Acknowledgemen t 
(UA) response  3.6.9  10.2. 6.9 M  
Disconnecte d Mode (DM) 
response  3.6.10  10.2. 6.10 M  
Fram e Rejec t (FRMR ) response  3.6.11  – M Note 2 
Exchang e Identificatio n (XID) 
command/response  3.6.12  – NA Note 2 
NOTES:  
i)  Value ‘0’ is allocated to TEI. Other values are not used in PRA.  
ii)  TBR 4 does not support FRM R respons e and XID comma nd/response.  
 
  MCMC  MTSFB TC T 009:2014 
9 
 Table  3.  Elements for layer-to-layer communica tion 
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remarks  
Elements for layer-to-layer 
commu nication 4 – GID  
 
 
Table  4.  Procedures  for use by the data link layer 
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remarks  
Definitio n of peer-to-peer 
procedure s for the data link layer 5 – GID  
Procedure s for the use of P/F bit 5.1 – – Heading  
Unacknowle dged informatio n 
transf er 5.1.1  10.4.1  M NA to PRA 
Acknowledge d multiple frame 
inform ation transfer  5.1.2  10.6 
and 
10.7 M  
Procedur e for unackn owledged 
informa tion transfer  5.2 10.4 – NA to PRA 
TEI management procedures 5.3 10.5 – NA to PRA 
Initialization of data link layer 
parameters  5.4 – NA Note 1 
Procedur e for establis hment and 
release of multiple frame 
operation  5.5 10.6 –  
Procedur e for informa tion transfer 
in multiple frame operation 5.6 10.7 GID  
Re-establis hment of multiple 
frame operation  5.7 – –  
Exceptio n conditio n reporting and 
recovery 5.8 10.9 
Note 2 GID Multipl e TEI assignmen t is not 
applicable.  
List of system paramete rs 5.9 10.10  M  
Time r T200  5.9.1  10.10.1  M The defaul t value shall be 1 s. 
Max numbe r of retransmissions 
(N200)  5.9.2  10.10.2  M The defaul t value shall be 3. 
Max number of octets in an 
inform ation field (N201)  5.9.3  10.10.3  M The defaul t value shall be 260 
octets. 
  MCMC  MTSFB TC T 009:2014 
10 
 Table  4.  Procedures  for use by the data link layer (continued)  
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remarks  
Max numbe r of transmissi on of 
the TE I identity reques t messa ge 
(N202)  5.9.4  10.10.4  M NA to PRA 
Max numbe r of outstan ding I 
frames (k)  5.9.5  10.10.5  M For a SAP supportin g primary rat e 
signaling, the value is 7. 
Time r T201  5.9.6  – NA NA to PRA 
Time r T202  5.9.7  10.10.6  M NA to PRA 
Time r T203  5.9.8  – O The defaul t value is 10 s. 
– – 10.10.7 
Note 3 GID Laye r 2 respons e time 
Data link monitor functi on 5.10 – O  
NOTES:  
i)  The data link layer parameter s shall be initialize d to default values.  
Ii)  TBR 4 consider s the receip t of an invalid N(R) as the only conditio n for frame reject ion. 
iii)  The maxim um time betwee n receipt of an incomin g frame and generati on of a respons e shall not excee d 500 ms, operating in 
a point-to-point signalin g connectio n. 
 
 
Table  5.  Annexes  and Appendices  
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remarks  
Provisio n for point -to-point data 
link connection  Anne x 
A 10.3 M For single point -to-point signaling  
connectio n at layer 3, TE I value 0 
shall be used in combinatio n with 
SAPI 0. 
An SDL representatio n of the 
point- to-point procedures of data 
link layer Anne x 
B – –  
SDL representatio n of the 
broadcast procedure s of the data 
link layer  Anne x 
C – GID  
State transiti on table of the point -
to- point procedure s of the data 
link layer Anne x 
D – –  
 
 
  MCMC  MTSFB TC T 009:2014 
11 
 Table  5.  Annexes  and Appendices  (continued)  
 
Title ITU-T 
Rec. 
Q.921  ETSI 
TBR 4 CR Remarks  
 
Provisio n of multi-select ive reject 
option  Anne x 
E – GID  
Protoco l Implement ation 
Conformanc e Statement (PICS ) 
to Recommendatio n Q.92 1 for 
Basic Rat e (User -side)  Anne x 
F – GID  
Protoco l Implement ation 
Conformanc e Statement (PICS ) 
to Recommendatio n Q.92 1 for 
Basic Rat e (Netwo rk-side)  Anne x 
G – GID  
Protoco l Implement ation 
Conformanc e Statement (PICS ) 
to Recommendatio n Q.92 1 for 
Prima ry Rate (User -side)  Anne x 
H – GID  
Protoco l Implement ation 
Conformanc e Statement (PICS ) 
to Recommendatio n Q.92 1 for 
Prima ry Rate (Netwo rk-side)  Anne x I – GID  
Inter-exchange signaling  data 
link layer protocol  in Private 
Integrat ed Servi ces Networks 
(PISNs)  Anne x J 
(Q.921 
Amend -
ment 1) – GID Applic ability and additi ons to fram e 
structure, elem ents of pr ocedures, 
forma ts of fields, elemen ts for layer-
to-layer com munication, peer -to-peer 
procedures to  accomm odate PISN 
inter-exchange requ irements 
Retransmissio n of REJ response 
frame  Appendi x 
I – O  
Occurrenc e of MDL -ERROR- 
INDIC ATIO N within the basic 
states & action s to be taken by 
the managemen t entity  Appendi x 
II – GID  
Optiona l basic acces s 
deactiv ation procedures  Appendi x 
III – NA May be used by network side syste m 
managemen t to control deactiv ation 
of access  
Autom atic negotiation of data link 
layer parameters  Appendi x 
IV – O  
Inter-exchang e signaling  data link 
layer protoco l in PISNs  Appendi x 
V (Q.921 
Amend -
ment 1) – GID Occurrenc e of the MDL -ERRO R 
indication primitiv e in the data link 
layer protoco l for the supp ort of Inter -
exchang e signaling  in PISNs 
  MCMC  MTSFB TC T 009:2014 
12 
 Section D  
 
 Network layer requirements based on EN 300 403 -1 11/99, Integrated Services 
Digital Network (ISDN): Digital S ubscriber Signaling System No. One (DSS1) 
protocol: Signaling  network l ayer for circuit -mode basic call control; Part 1: 
Protocol Specification [ITU -T Recommendation Q.931 (1993), modified]  
 
 
1   Introduction  
 
 This section  contains clarification and recommended option selections for the ETSI ISDN standards 
and technical rep orts related to basic call control procedures of ISDN basic and primary 
access signaling. This document covers the basic call control of layers 1, 2 and 3. The aim of this 
document is to  avoid  unnecessary  options  and  vagueness  in  ISDN  implementatio ns  and  
to  ensure  the interoperability of ISDN networks and terminal equipment in Malaysia. This 
requirement has to be followed when implementing access -signaling protocol i.e. Digital Subscriber 
Signaling System No. 1 (DSS1).  
 
 
2   Supporting Informat ion 
 
2.1 Integrated Services Digital Network (ISDN): Standards Guide (ETR 076 - December     1996,  
Fourth Edition)  
 
2.2 Integrated Services Digital Network (ISDN): Customer Access Maintenance (ETR 001  August  
1990)  
 
2.3 Integrated Services Digital Network: User –Network inter face layer 3 Specifications for  basic call 
control (ETS 300 102 -1 12/90)  
 
2.4 Integrated Services Digital Network  (ISDN): Digital Subscriber Signaling System No.  1  
(DSS1) protocol:  Data link layer; Part 2: General protocol spec ification  [ITU-T Recommendation 
Q.921 (1993), modified]  (ETS 300 402 -2 11/95).  
 
2.5 Integrated Services Digital Network  (ISDN): Digital S ubscriber Signaling System No. One 
(DSS1) protocol: Signaling  network layer for circuit -mode basic call control; Part 1: Protocol 
Specification [ITU -T Recomme ndation Q.931 (1993), modified] ) (ETS 300 403 -1 11/95)  
 
2.6 Integrated Services Digital Network  (ISDN): Digital Subscriber Signaling System No.    One 
(DSS1) protocol: Signaling  network layer for circuit -mode basic  call control; Part 1: Protocol 
Specification [ITU -T Recommendation Q.931 (1993), modified]  (EN 300 403 -1 11/99).  
 
2.7 Integrated Services Digital Network  (ISDN): Digital Subscriber Signaling System No.  One  
(DSS1) Protocol:  Signaling Network Laye r For Circuit -Mode Basic Call Control:  Part 2: 
Specification and Description Language (SDL) Diagrams (ETS 300 403 -2 11/95).  
 
2.8 Integrated Services Digital Network (ISDN) : Application Of The Bear er Capability (BC), High  
Layer Compatibility (HLC) an d Low  Layer Compatibility (LLC) Information Elements By 
Terminals Supporting ISDN Services (ETR 018 11/95)  
2.9   ISDN User –Network Interface Layer 3 Specification for basic call control (ITU -T Q.931 3/93)  
2.10 Technical Guidelines of ISDN Supplementary Service s (Functional Protocol)  MCMC  MTSFB TC T 009:2014 
13 
 3   National Option Selections and Clarifications  
 
3.1  Layer One Protocol for Basic Call Control (DSS1)  
 
The DSS1 basic call layer one protocol for the basic access is contained in the standard ETS 300 012 
(10/98) and for the prima ry rate access in the standard ETS 300 011 (3/98)  
 
The ETSI technical report ETR 001(8/90) defines the maintenance requirement for basic and 
primary access.  
 
3.2  Layer Two Protocol for Basic Call Control (DSS1)  
 
The DSS1 basic call layer two protocol f or the basic and primary access is contained in    the 
standard ETS 300 402 -1 (11/95).  
 
It is recommended that a reset of layer 3 always reset layer 2 in    ISDN -terminal equipment. If 
layer 3 can be reset without resetting layer 2, an ISDN terminal which  is reset during the active phase 
of a call, may lose control over that call.  
 
3.3  Layer Three Protocol for Basic Call Control (DSS1)  
 
The DSS1 layer three protocol for basic call control is contained in the base standard ETS 300 102 -1 
(12/90), ITU -T Q.931 (3/93), ETS 300 403 -1 (11/95) and EN 300 403 -1 (11/99).  ). The EN 300 403 -1 
(11/99) is a main standard for DSSI Layer 3 implementation.  
 
When implementing the DSS1 layer three protocol in Malaysia network, the following guidelines 
are recommended to be  taken into account (The main numbering refers to the ITU -T Q.931 (3/93) , 
this standard had been adopted and extended by  EN 300 403 -1 (11/99).  
 
 
Table 6. Appendices  
 
Clause No.  Clause Description  Recommendation  
2 OVERVIEW OF CALL 
CONTROL  SDL diagrams in the standard ETS 300 403 -2 
(11/95) are recommended to be used as informative.  
3.1.3  CONNECT  The transport of low layer compatibility information element 
(LLC) to the calling user is supported on the ISDN end -to-end 
connections. The date/time information element is 
recommended to be sent by the network.  
3.1.6  INFORMATION  The use of Keypad f acility information element is defined 
in EN 300 122 -1 (6/98), "Integrated Services Digital Network 
(ISDN); Generic keypad protocol for the support of 
supplementary ser vices; Digital Subscriber Signaling  
System No. One (DSS1) protocol; Part 1: Protocol 
Specification ".  
 
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 Table 6. Appendices (continued ) 
 
Clause No.  Clause Description  Recommendation  
3.1.14  SETUP  Annex E (network specific facility selection) an d Annex 
C (transit network selection) are not applicable. Transit 
network selection is implemented in the DSS1 signaling 
by using operator codes in the called number digits 
(operator code + called party number).  
 
The use of Keypad facility information ele ment is defined in 
EN 300 122 -1 (6/98).  
Two bearer capability information elements are supported 
(EN 300 403 -1 (11/99), subclause 5.11).  
 
Two high layer compatibility information elements are 
supported (EN 300 403 -1(11/99), subclause 5.12)  
4 General mes sage 
format  and information 
elements coding   
4.4 Message type  No national message types are defined.  
4.5.2  Extension of codesets  No information elements belonging to codeset 6 (national) are 
defined.  
4.5.7  Call state  Only CCITT standardized coding is u sed.  
4.5.8  Called party number  Type of number: Codepoint showing "subscriber number" 
shall be used from network to user.  
The codepoint used  in  connection  with  the 
supplementary  services  Direct Dialing In (DDI) and 
Multiple Subscriber Number (MSN) is specified in a 
separate  document   for    ISDN   supplementary 
services   Technical   Guidelines   of  ISDN Supplementary 
Services(Functional Protocol)  
4.5.10  Calling party number  The use of the fields is subject to a separate document for 
ISDN suppleme ntary services Technical Guidelines of ISDN 
Supplementary Services(Functional Protocol)  
4.5.12  Cause  Coding standard :  Codepoints showing “CCITT standardized 
coding” and "National standard" may be used.  
No national cause values are defined.  
4.5.13  Channe l identification  Coding standard: CCITT standardized coding is always used.  
4.5.15  Date/time  The date/time indicated is local date / time.  
4.5.21  Network specific facilities  Not applicable.  
4.5.22  Progress indicator  Coding standard: CCITT standardized c oding is always used . 
  MCMC  MTSFB TC T 009:2014 
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 Table 6. Appendices (continued ) 
 
Clause No.  Clause Description  Recommendation  
4.5.29  Transit network selection  Not applicable.  
Transit  network  selection  is  implemented  in  the  DSS1  
signaling  by  using operator codes in  th e  called  number  
digits  (operator  code +  called  party number).  
5 Circuit -switched call 
control procedures  Optional extensions to the basic protocol and exceptions that 
apply in the case of supplementary services are not subject to 
this guideline docum ent.  
An INFORMATION message received in the Release 
Request State shall be ignored.  
5.1.1  Call request  The network shall recognize both the sending complete 
information element and the "#" character.  
5.1.3  Overlap sending  In case (a) the dial tone opti on with Progress Indicator #8 is 
applied  
5.1.10  Transit network selection  Not applicable.  
Transit  network  selection  is  implemented  in  the  DSS1  
signaling  by  using operator codes  in  the  called  number  
digits  (operator  code   + called  party number).  
5.2 Call establishment at the 
destination interface  It is recommended for the basic access that a timer is 
implemented on the network side in order to ensure that 
layer 2 is released if during a time period, (e.g. 10 -15 
seconds) no layer 3 connecti ons are present on the data link.  
 
In special cases, e.g. NT2, data link connections may be 
established as soon as TEI is assigned (either locally or by 
the automatic assignment procedure), and may be retained 
indefinitely.  
 
It is recommended that a reset  of layer 3 always reset layer 2 
in ISDN -terminal equipment. If layer 3 can be reset without 
resetting layer 2, an ISDN terminal which is reset during the 
active phase of a call, may lose control over that call.  
5.2.1  Incoming call  The network shall have  the knowledge that a single -point 
configuration exists, and that information is entered at the 
time of configuration of the access.  
5.2.3.1  SETUP message 
delivered by point -to-
point data link  Only options 1) "channel is indicated, no acceptable 
alternat ive" and 4) "no B channel available" are used.  
5.2.4  Overlap receiving  In overlap receiving the network cannot in all cases determine 
that sufficient call setup information has been received, 
and the Sending complete information element is not 
required ( Refer to Technical Guidelines of   ISDN 
Supplementary Services (Functional Protocol),  
DDI).  
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 Table 6. Appendices (continued)  
 
Clause No.  Clause Description  Recommendation  
5.2.5.2  Receipt of CALL 
PROCEEDING and 
ALERTING  Timer 304 is only used on point -to-point data links, as 
overlap receiving is applicable only on point -to-point 
connections.  
5.2.6  Notification of 
interworking at the 
terminating interface . Concerning the first subsection a) the normal call handling 
procedures shall be applied at the te rminating exchange 
(i.e. the terminating exchange shall only through -connect 
after a CONNECT message has been received from the 
called user).  
5.2.7  Call accept  In case the private exchange has diverted the speech call it is 
recommended that the Calling p arty is informed of the 
diversion (with an announcement) if the private exchange 
sends the call acceptance message (CONNECT) towards 
the Calling party before the call acceptance message has 
been received from the diverted connection. This in -band 
informati on is given immediately after the call acceptance 
message sending.  
 
Note:  Establishment of the bearer connection prior to call acceptance is 
described in ETS 300 403 -1 Annex K. If this procedure is applied then the 
inband information is given prior the c all acceptance message sending .  
5.3.4.1  Clearing when 
tones/announcements 
provided  In order to receive the inband information it is 
recommended that the user connects to the B -channel 
on receipt of the DISCONNECT message with progress 
indicator No. 8.  
5.3.4bis 
(EN 300 
403-1 
11/99)  Absence of response 
during call clearing  In case a B -channel is placed in a maintenance condition, 
the actions to be taken are described in subclause 5.5.  
5.6.1  Call suspension  When the call identity is used, it is recommende d for the 
terminals to use IA5 -coded characters.  
5.6.2  Call suspended  When the call identity is used, it is recommended for the 
terminals to use IA5 - coded characters.  
5.6.5  Call resume errors  The network shall preserve the call identity along with a 
clearing cause during the period of timer T307.  
5.8.5.1  Information element out 
of sequence  The network is not required to process information 
elements received out of sequence.  
5.8.5.2  Duplicated information 
elements  The BC (Bearer Capability) and HLC (Hig h Layer 
Compatibility) information elements may be duplicated in the 
SETUP message (EN 300 403 -1 (11/99), subclause 5.11 
and 5.12).  
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 Table 6. Appendices (continued ) 
 
Clause No.  Clause Description  Recommendation  
5.8.7.2  Non-mandatory 
information element 
content error  Information elements exceeding the maximum length shall 
not be truncated and processed except the call identity 
information element.  
5.8.9  Data link failure  It is recommended that the network transmits a STATUS 
ENQUIRY message when layer 2 i s re-established.  
5.11 Signaling  procedures for 
bearer capability 
selection  Supported on ISDN end -to-end connections (i.e. the network 
signaling  system is ISUP)  
5.12 Signaling  procedures for 
high layer compatibility 
selectio n Supported on ISDN end -to-end connections (i.e. the network 
signaling  system is ISUP)  
8 Circuit -mode multirate 
(64 kbit/s base rate) 
procedures  Not Applicable  
9.1 Timers in the network 
side Timer No. 302 : Time -out value is 5s  
9.2 Timers in t he user side  Timer No. 301 : Time -out value is 3 min.  
Annex B  Compatibility and 
address checking   
B.1 Introduction  Codings of BC, HLC and LLC are subject to the ETR 018 
(11/95).  
B.3.1  Compatibility checking 
with addressing 
information  Called party numb er (whole subscriber number) is 
always included in the SETUP message from the network 
to user in point -to-multipoint configurations.  
Compatibility checking with addressing information should be 
used in terminals, since otherwise it may restrict the use of  
several terminals in the same access or the use of multi -
service terminals. (Further information can be found in the 
supplementary services guideline document Technical 
Guidelines of  ISDN Supplementary Services (Functional 
Protocol), e.g. Multiple Subscri ber Number supplementary 
service).  
B.4 Interworking with 
existing networks  When a Progress indicator information element #1 or #3 is 
sent to the terminal equipment, the network will not send 
the High layer or Low layer compatibility information 
elements t o the terminal equipment. The terminal 
equipment should in this case use compatibility checking 
only with Addressing Information and Bearer Capability. 
When the High layer and/or Low layer information elements 
are sent to the terminal equipment, the termin al equipment 
shall use them in the compatibility checking.  
  MCMC  MTSFB TC T 009:2014 
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 Table 6. Appendices (continued ) 
 
Clause No.  Clause Description  Recommendation  
ANNEX C  Transit network 
selection  Not applicable.  
ANNEX D  Extension for symmetric  
call operation  Not applicable  
ANNEX E  Network specific facility 
selection  Not Applicable  
ANNEX F  D-channel backup 
procedures  Not Applicable  
ANNEX J  Low layer compatibility 
negotiation  The transport of LLC to the calling user is only supported on 
the ISDN end -to-end connections.  
 
 
4.     Terminal Characteristics Related To Access Signaling  
 
Terminal characteristics related to access signaling and used for type approval purposes 
arecontained in  standards ETS 300 085(12/90), ETS 300 087 (4/94), ETS 300 104 (6/94), NET 003 
(9/95), NET 005 (9/95), I -ETS 300 245 -1 (2/96), TBR 003 (11/95), TBR 003/A1 (2/98), TBR 004 
(11/95), TBR 004/A1 (2/98), TBR 008(9/94), TBR 008(10/98), TBR 008/C2 (2/2001) and the 
corresponding CTRs.  
 
 
5.     Terminal Adaptors   
 
5.1 Circuit Mode Bearer Services  
 
Term inal adaptor functions and associated access signalin g requirements for circuit mode bearer  
services are contained in the standard ETS 300 103 (12/90).  
 
  MCMC  MTSFB TC T 009:2014 
19 
 Annex A  
(Normative)  
 
Normative references  
 
Erratum1 (02/2003) to  
ITU-T Rec. Q.931  ISDN User -Network I nterface Layer 3 Specification for Basic Call 
Control  
ETR 080 Nov 96  Digital transmission system on metallic local lines  
ETSI TBR 3 Nov 95  Attachment requirements for terminal equipment to connect to an 
ISDN using ISDN basic access  
ETSI TBR 3 A1 Dec 97  This amendment A1 modifies the TBR 3 (1995 ) 
IEC 60950 -1: 2001  Information Technology Equipment – Safety  
IEC CISPR 22: 2003 -04 Information Technology Equipment – Radio disturbance 
characteristics – Limits and methods of measurement  
ITU-T Rec. I.430 (11/9 5) Basic User -Network Interface – Layer 1 Specification  
ITU-T Rec. Q.921 (09/97)  ISDN User -Network Interface – Data Link Layer Specification  
ITU-T Rec. Q.921  
Amendement 1 (02/2000)  ISDN User -Network Interface – Data Link Layer Specification 
Amendment 1  
[ITU-T Recommandation 
Q.931 (1993), modified] (EN 
300 403 -1 11/99)  Integrated Services Digital Network (ISDN): Digital Subscriber 
Signaling System No.  One (DSS1) protocol: Signaling  network layer 
for circuit -mode basic call control; Part 1: Prot ocol Specification  
ITU-T Rec. Q.931  
Amendement 1 (05/98)  ISDN User -Network Interface Layer 3 Specification for Basic  
Call Control Amendment 1  
Extensions for the support of digital multiplexing equipment  
ITU-T Rec. G.961 03/93  Digital Transmission System on Metallic Local Lines for ISDN Basic  
Rate Access  
 
 
NOTES:  
 
ETSI   Europea n Telecommunication s Standard s Institute  
ETR   ETSI Technica l Report  
IEC   Internationa l Electro -technica l Commission  
ITU-T  Internationa l Telecommunicatio n Union – Telecommunic ation Sector  
TBR   Technica l Basis for Regulation  
 
  MCMC  MTSFB TC T 009:2014 
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 Annex B  
(Informative ) 
 
 
Technical Guidelines of ISDN Supplementary Service  
 
 
B1. Introduction  
 
This document contains clarifications and recommended option selections for the ETSI ISDN 
standards related to ISDN supplementary services. This document covers the implementation of 
ISDN supplementary services using functional protocol. The aim of this document is to avoid 
unnecessary options and vagueness in ISDN implementations and to ensure the interoperabil ity of 
ISDN networks and terminal equipment in Malaysia.  
 
 
B2. Supporting Information  
 
B2.1 Integrated  Services Digital Network  (ISDN); Multiple Subscriber Number (MSN) supplementary  
service; Service Description (ETS 300 050, October 1991)  
 
B2.2 Integrate d Services Digital Network  (ISDN); Mul tiple Subscriber Number (MSN) supplementary  
service; Functional capabilities and information flows (ETS 300 051, October 1991)  
 
B2.3 Integrated  Services Digital Network  (ISDN); Multiple Subscriber Number (MSN) suppleme ntary  
service; Digital Subscriber Signaling System No. one (DSS1) protocol (ETS 300 052 -1, October 1991)  
 
B2.4 Integrated  Services Digital Network (ISDN); Terminal Portability (TP) supplementary service; 
Service  Description (ETS 300 053, October 1991)  
 
B2.5 Integrated  Services Digital Network (ISDN); Terminal Portability (TP) supplementary service;  
Functional capabilities and information flows (ETS 300 054, October 1991)  
 
B2.6 Integrated Services Digital Network (ISDN); Terminal Portability (TP) supplementa ry service; 
Digital  Subscriber Signaling System No. one (DSS1) protocol (ETS 300 055 -1, October 1991)  
 
B2.7 Integrated  Service Digital Network  (ISDN); Call Waiting (CW) supplementary service; Service  
Description (ETS 300 056, October 1991) and Amendment A1  (September 1996)  
 
B2.8 Integrated Services Digital Network  (ISDN); Call Waiting (CW) supplementary service; 
Functional  capabilities and information flows (ETS 300 057, May 1992)  
 
B2.9 Integrated  Services Digital Network  (ISDN); Call Waiting (CW) supplemen tary service; Digital  
Subscriber Signaling System No. one (DSS1) protocol (ETS 300 058 -1, October 1991)  
 
B2.10 Integrated  Services Digital Network (ISDN); Sub -addressing (SUB) supplementary service; 
Service  Description (ETS 300 059, October 1991)  
 
B2.11 Integrated Services Digital Network (ISDN); Sub -addressin g (SUB) supplementary service; 
Functional  capabilities and information flows (ETS 300 060, October 1991)  
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 B2.12 Integrated Services Digital N etwork (ISDN); Sub -addressing (SUB) supplementary service;  
Digital  Subscriber Signaling System No. one (DSS1) protocol (ETS 300 061 -1, October 1991)  
 
B2.13 Integrated Services Digital Ne twork (ISDN); Direct Dialing In (DDI) supplementary service; 
Service  Description (ETS 300 062, October 1991)  
 
B2.14 Integrated Services Digital Network  (ISDN); Direct Dialling  In (DDI) supplementary service;  
Functional capabilities and information flows (ETS 300 063, October 1991)  
 
B2.15 Integrated Services Digital Network (ISDN); Direct Dialing In (DDI) supplementary service; 
Digital Subscriber Signaling System No. one (DSS1) protocol (ETS 300 064 -1, October 1991)   
 
B2.16 Integrated  Services Digital Network (ISDN); Calling Line Identification Presentation  (CLIP)  
supplementary service; Service description (ETS 300 089, January 199 2) 
 
B2.17 Integrated  Services Digital Network (ISDN); Calling Line Identification Restriction  (CLIR)  
supplementary service; Service description (ETS 300 090, January 1992)  
 
B2.18 Integrated  Services  Digital Network  (ISDN); Calling Line Identification Prese ntation  (CLIP) and  
Calling Line Identification Restriction  (CLIR) supplementary services; Functional capabilities and  
information flows (ETS 300 091, March 1992)  
 
B2.19 Integra ted Services Digital Network (ISDN); Calling Line Identification Presentation  (CLIP) 
supplementary service; Digital Subscriber Signaling System No. one (DSS1) protocol (ETS 300 092 -1, 
March 1992), Amendment A1 (April 1993) and Amendment A2 (November 1994)  
 
B2.20 Integrated  Services  Digital Network (ISDN); Calling Line Identification  Restriction  (CLIR)  
supplementary service; Digital Subscriber Signaling System No. one (DSS1) protocol (ETS 300 093 -1, 
March 1992)  
 
B2.21 Integrated  Services Digital  Network  (ISDN);  Connected Line Identification Presentation  (COLP)  
supplementary service; Ser vice description (ETS 300 094, January 1992)  
 
B2.22 Integrated  Services Digital Network  (ISDN); Connected Line Identification Restriction  (COLR)  
supplementary service; Service description (ETS 300 095, January 1992)  
 
B2.23 Integrated Services Digital Netwo rk (ISDN); Connected Line Identification Presentation (COLP) 
and Connected Line Identification Restriction (COLR) supplementary services; Functional capabilities 
and information flows (ETS 300 096, May 1992)  
 
B2.24 Integrated  Services Digital  Network  (ISDN ); Connected Line Identification  Presentation  (COLP)  
supplementary service; Digital Subscriber Signaling System No. one (DSS1) protocol (ETS 300 097 -1, 
March 1992) and Amendment A1 (November 1994)  
 
B2.25 Integrated  Services Digital Network  (ISDN); Connecte d Line Identification Restriction  (COLR)  
supplementary service; Digital Subscriber Signaling System No. one (DSS1) protocol (ETS 300 098 -1, 
May 1992)  
 
B2.26 Integrated Services Digital Network (ISDN); Malicious Ca ll Identification (MCID) 
supplementary  service; Service description (ETS 300 128, May 1992)  
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 B2.27 Integrated Services Digital Network (ISDN); Malicious Call Identification  (MCID) 
supplementary  service; Functional capabilities and information flows (ETS 300 129, May 1992)  
 
B2.28 Integ rated Servic es Digital Network (ISDN);  Malicious Call Identification (MCID) 
supplementary  service; Digital Subscriber Signaling System No. one (DSS1) protocol (ETS 300 130 -1, 
May 1992)  
 
B2.29 Integrated  Services Digital Network (ISDN); Closed User Group (CUG) supplem entary service; 
Service  description (ETS 300 136, March 1992)  
 
B2.30 Integrated Services Digital Network  (ISDN); Closed User Group  (CUG) supplementary 
service;  Functional capabilities and information flows (ETS 300 137, May 1992)  
 
B2.31 Integrated  Services  Digital Network (ISDN); Closed User Group (CUG) supplementary service; 
Digital  Subscriber Signaling System No. one (DSS1) protocol (ETS 300 138 -1, May 1992) and 
Amendment  A1 (January 1996)  
 
B2.32 Integrated  Services Digital Network  (ISDN); Call Hold (HOLD ) supplementary service; Service  
description (ETS 300 139, March 1992)  
 
B2.33 Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; 
Functional  capabilities and information flows (ETS 300 140, May 1992)  
 
B2.34 Integrated  Servic es Digital Network  (ISDN); Call Hold  (HOLD) supplementary service; Digital  
Subscriber Signaling System No. one (DSS1) protocol  (ETS 300 141 -1, May  1992) including  
Corrigendum (August 1993)  
 
B2.35 Integrated  Services Digital Network (ISDN); Advice of Charg e: charging information at call set -up 
time (AOC -S) supplementary service; Service description (ETS 300 178, October 1992)  
  
B2.36 Integrated Services Digital Network (ISDN); Advice of Char ge: charging information during 
the call (AOC -D) supplementary serv ice; Service description (ETS 300 179, October 1992)  
 
B2.37 Integrated Services Digital Network (ISDN); Advice of Charge: charging information at the end 
of the call (AOC -E) supplementary service; Service description (ETS 300 180, October 1992)  
 
B2.38 Integrated Services Digital  Network  (ISDN); Advice of Charge (AOC) supplementary service;  
Functional capabilities and information flows (ETS 300 181, April 1993)  
 
B2.39 Integrated Services Digital Network (ISDN); Advice of Charge (AOC) supplementary service;  
Digital  Subscriber Signaling System No. one (DSS1) protocol (ETS 300 182 -1, April 1993)  
 
B2.40 Integrated Services Digital  Network  (ISDN); Three -Party  (3PTY) supplementary service; 
Service  description (ETS 300 186, July 1993)  
 
B2.41 Integrated Services Di gital Network (ISDN); Three -Party (3PTY) supplementary service; 
Functional  capabilities and information flows (ETS 300 187, August 1993)  
 
B2.42 Integrated  Services Digital Network  (ISDN); Three -Party (3PTY) supplementary service; Digital  
Subscriber Signali ng System No. one (DSS1) protocol (ETS 300 188 -1, August 1993)  
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 B2.43 Integrated Services Digital Network (ISDN); Supplementary Service Interactions; Digital 
Subscriber  Signaling System No. one (DSS1) protocol, Part 1: Protocol specification (ETS 300 195 -
1, February  1995)  
 
B2.44 Integrated Services Digital Network  (ISDN); Generic functional protocol for the support of 
supplementary services; Digital Subscriber Signaling System No. one (DSS1)  protocol   
(ETS 300 196 -1, August 1993) and Amendment A1 (May 1995 ) 
 
B2.45 Integrated Services Digital Network (ISDN); Call Forwarding Busy (CFB) supplementary 
service;  Service description (ETS 300 199, December 1994)  
 
B2.46 Integrated Services Digital Network (ISDN) ; Call Forwarding Unconditional  (CFU) 
supplementary  service; Service description (ETS 300 200, December 1994)  
 
B2.47 Integrated Services Digital Network  (ISDN); Call Forwarding No Reply (CFNR) supplementary  
service; Service description (ETS 300 201, December 1994) and Amendment A1 (September 1996)  
 
B2.48 Integrated Services Digital Network  (ISDN); Call Forwarding Busy (CFB) supplementary 
service; Functional capabilities and information flows (ETS 300 203, December 1994)  
 
B2.49 Integrated Services Digital Network (ISDN) ; Call Forwarding Unconditional  (CFU) 
supp lementary  service; Functional capabilities and information flows (ETS 300 204, December 1994)  
 
B2.50 Integrated Services Digital  Network  (ISDN); Call Forwarding No R eply (CFNR) supplementary  
service; Functional capabilities and information flows (ETS 300 205, December 1994)  
 
B2.51 Integrated Services Digital Network  (ISDN); Diversion supplementary services; Digital 
Subscriber  Signaling No. one (DSS1) protocol (ETS 300 207 -1, December 1994) and Corrigendum 
(June 1995)  
 
B2.52 Integrated Services Digital Net work  (ISDN); User -to-user signaling (UUS) supplementary 
service;  Service description (ETS 300 284, March 1996)  
 
B2.53 Integ rated Services Digital Network (ISDN); User -to-user signaling (UUS) supplementary 
service;  Functional capabilities and information f lows (ETR 285, March 1996)  
 
B2.54 Integ rated Services Digital Network (ISDN); User -to-user signaling (UUS) supplementary 
service; Digital Subscriber Signaling one (DSS1) protocol (ETS 300 286 -1, February 1993)  
 
B2.55 Integrated Services Digital Network  (ISDN); Explicit Call Transfer (ECT) supplementary 
service;  Service description (EN 300 367, V1.2.1, October 1998)  
 
B2.56 Integrated Services Digital Network (ISDN); Explicit Call Transfer  (ECT) supplementary 
service; Functional capabilities and information  flows (EN 300 368, V1.2.2, December 1998)  
 
B2.57 Integ rated Services Digital Network (ISDN); Explicit Call Transfer (ECT) supplementary 
service; Digital Subscriber Signaling one (DSS1) protocol (EN 300 369 -1, V1.2.4, October 1998)  
 
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24 
 B3. National Option  Selections and Clarifications  
 
B3.1 Generic functional protocol for the support of supplementary services  
 
The supplementary services of this specification are based on the funct ional protocol. Therefore, the 
public network shall support the generic part of the functional protocol according to ETS 300 196 -1 
[44].  
 
Only those functions need to be implemented, which are required to support the selected 
supplementary services. Network options of ETS 300 196 -1 are left as implementation options, unless 
stated  otherwise in the Sub clauses relating to the individual supplementary services. Should any 
conflict arise between ETS 300 196 -1 and the specifications in Sub clause 3.2 to 3.16, then the 
text of the individual supplementary services shall be taken as defi nitive.  
 
B3.2 Multiple Subscriber Number (MSN)  
 
B3.2.1  Definition  
 
The Multiple Subscriber Number (MSN) supplementary service provides the possibility for assigning 
multiple numbers to a single public or private access.  
 
NOTE: This allows e.g.:  
 
1)   A calling user to select, via the public network, one or multiple distinct terminals out of multiple choices;  
2)   To identify the  terminal  to  the  network  for  the  application  of  other  supplementary services.  
 
B3.2.2  Service Description  
 
The servi ce description (stage 1 description) for the MSN supplementary service is contained in 
the standard ETS 300 050 [1].  
 
The following gives the recommended guidelines for the implementation of the MSN supplementary 
service in the Malaysian network.  
 
 
Claus e 5 and sub clause 6.2.3  The multiple subscriber number provided by the calling party shall be 
the full ISDN subscriber number.  
 
The called party number to be transmitted to the user's installation 
shall comprise the full ISDN subscriber number  
Sub claus e 6.1  The maximum number of MSNs per access shall be 16.  
Sub clause 7.2  The MSN supplementary service can apply at an access to a private 
ISDN (e.g. when the public network does not know what equipment is 
connected to the access ) 
Clause 8  Supplementary s ervices can be individually assigned to each MSN 
number.  
Sub clause 8.9  Subscription  to  the  DDI  supplementary  service  and  the  MSN  
supplementary service  is mutually exclusive  
 
  MCMC  MTSFB TC T 009:2014 
25 
 Additional requirement  
 
On outgoing calls, when the screening of t he calling party number is successful, the CLI to be recorded 
in the charging record shall be the MSN number provided by the calling party. If the number screening is 
unsuccessful, the default ISDN number of the access shall be recorded in the charging rec ord 
 
B3.2.3  Functional Capabilities and Information Flows   
 
The functional capabilities and information flows (stage 2 description) for the MSN supplementary 
service are contained in the standard ETS 300 051 [2]. The stage  2 description can be taken as 
informative. The implementation of the MSN supplementary service in the Malaysian network shall be 
based on the stage 1 and stage 3 descriptions.  
 
B3.2.4  Digital Subscriber Signaling System No. One (DSS1) Protocol   
 
The DSS1 protocol (stage 3 description) fo r the MSN supplementary service is contained in the 
standard ETS 300 052 -1 [3].  
 
The following gives the recommended guidelines for the implementation of the MSN supplementary 
service in the Malaysian network.  
 
 
Sub clause 6.2  If the access has the MSN su pplementary service, the network may use the 
information in the calling party number information element to identify the calling 
terminal, and, if necessary, the appropriate basic or supplementary service  
Sub clause 9.2.1  The type of number indicated in t he Called party number information element sent 
to the user shall be coded as "subscriber number" and the full appropriate number 
shall be sent.  
 
The "numbering plan identification" field of the Called party number information 
element shall be coded "ISDN /telephony numbering plan" (ITU -T Recommendation 
E.164).  
Sub clause 9.3.1  All the coding options provided in this sub clause shall be implemented in the 
network.  
 
It is recommended that the type of number indicated in the Calling party number 
information  element sent to the network shall be coded as "subscriber number" and 
the full appropriate number shall be sent.  
 
 
B3.3 Terminal Portability (TP)  
 
B3.3.1  Definition  
 
The Terminal Portability (TP) supplementary service allows a u ser to move a terminal fro m one socket 
to another within one given basic access during the active state of a call. It also allows a user to move 
a call from one terminal to another terminal within one given basic access during the active phase of 
the call.  
  MCMC  MTSFB TC T 009:2014 
26 
 B3.3.2  Service Descrip tion 
 
The service description (stage 1 description) for the TP supplementary service is contained in the 
standard ETS 300 053 [4].  
 
The following gives the recommended guidelines for the implementation of the TP supplementary 
service in the Malaysian netwo rk.  
 
 
Sub clause 8.1.2  At call suspension request, the cumulative information (i.e. total charge incurred 
up to the moment when the call is suspended) shall be given.  
 
On resumption of the call, the sending of charging information shall start again 
and t he updated cumulative charging information shall be given.  
 
If the call is cleared while the call is suspended at the calling user's access, and if 
the calling user attempts to resume the call within the timer, then, advice of charge 
information shall be given to the user at the time of the resume attempt.  
Sub clause 8.1.3  If the call is cleared while the call is suspended at the calling user's access, and if 
the calling user attempts to resume the call within the timer, then advice of charge 
information can be given to the user at the time of the resume attempt  
 
 
B3.3.3  Functional Capabilities and Information Flows  
 
The functional cap abilities and information flows (stage  2 description) for the TP supplementary 
service are  contained in the standard ETS 300 054 [5]. The stage  2 description can be taken as 
informative. The implementation of the TP supplementary service in the Malaysian network shall be 
based on the stage 1 and stage 3 descriptions.  
 
B3.3.4  Digital Subscriber Signaling System No. One (DSS1 ) Protocol  
 
The DSS1 protocol (stage 3 description) for the TP supplementary service is contained in the 
standard ETS 300 055 -1 [6]. The TP supplementary service is implemented in the Malaysian network 
without national definitions or exceptions.  
 
B3.4 Call Waiting (CW)  
 
B3.4.1  Definition  
 
The Call Waiting (CW) supplementary service allows a user to be informed of an incoming call (as per 
basic call procedures) with an indication that no interface information channel is available. The user 
then has the cho ice of accepting, rejecting or ignoring the waiting call (as per basic call procedures).  
  MCMC  MTSFB TC T 009:2014 
27 
 B3.4.2  Service Description  
 
The service description (stage 1 description) for the CW supplementary service is contained in the 
standard ETS 300 056 [7].  
 
The follow ing gives the recommended guidelines for the implementation of the CW supplementary 
service in the Malaysian network.  
 
 
Clause 3 and sub clause 6.1  No specific time -out T2 will be used for no answer situation. Basic call 
timer shall apply in this  
Case . 
Clause 5  On the primary rate access, only notifications for the CW supplementary 
service are supported.  
 
The maximum number of calls that the network must be able to handle 
(e.g. active, held, alerting, waiting) on the basic access is six (6).  
Sub clause  6.1 The network will support the subscription option presented in Table 1.  
 
The network will support value two (2) for the network provider option in 
Table 2. This is specified for all ISDN numbers on the basic access.  
Sub clause 7.1  In interworking cas es with non -ISDNs, no special in -band indication will 
be provided to the calling user.  
 
 
B3.4.3  Functional Capabilities and Information Flows  
 
The functional capa bilities and information flows (stage  2 description) for the CW supplementary 
service ar e contained in the standard ETS 300 057  [8]. The stage 2 description can be taken as 
informative. The implementation of the CW supplementary service in the Malaysian network shall be 
based on the stage 1 and stage 3 descriptions.  
 
B3.4.4   Digital Subscriber S ignaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the CW supplementary service is contained in the  standard 
ETS 300 058 -1 [9].  
 
The following gives the recommended guidelines for the implementation of the CW supplementary  
service in the Malaysian network.  
 
 
Sub clauses 9.5.1.1, 9.5.2, 9.6.1 and 9.6.2, and 
clauses 13 and 14  In the network side the basic call timer T301 is 
used.  
 
  MCMC  MTSFB TC T 009:2014 
28 
 B3.5 Sub addressing (SUB)  
 
B3.5.1       Definition  
 
The Sub addressing (SUB) supplementary s ervice allows the called (served) user to expand his 
addressing capacity beyond the one given by the ISDN number.  
 
B3.5.2  Service Description  
 
The service description (stage 1 description) for the SUB supplementary service is contained in the 
standard ETS 300 059 [10].  
 
The following gives the recommended guidelines for the implementation of the SUB supplementary 
service in the Malaysian network.  
 
 
Sub clause 5.1  The 20 octets maximum size of   is applied.  
 
 
B3.5.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information flows (stage 2 description) for the SUB supplementary 
service are contained in the standard ETS 300 060 [11]. The stage 2 description can be taken 
as informative. The implementation of the SUB supplementa ry service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
B3.5.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the SUB supplementary service is contained in the  
standard ETS 300 061 -1 [12].  
 
The following gives the recommended guidelines for the implementation of the SUB supplementary 
service in the Malaysian network.  
 
 
Clause 5, note 2  The 20 octets  maximum size of the sub address is applied.  
 
 
B3.6 Direct Di aling In (DDI)  
 
B3.6.1  Definition  
 
The DDI supplementary service enables a user to call directly via a public ISDN a user on a private 
ISDN by using the public ISDN numbering plan.  
  MCMC  MTSFB TC T 009:2014 
29 
 B3.6.2  Service Description  
 
The service description (stage 1 description ) for the DDI supplementary service is contained in the 
standard ETS 300 062 [13].  
 
The following gives the recommended guidelines for the implementation of the DDI supplementary 
service in Malaysian network.  
 
 
Clause 5  The number of digits is defined on a per subscriber basis.  
Sub clauses 8.5.1 and 8.5.3  A special arrangement for not screening the user provided number may 
be applied. For network wide operation ISUP version 2 is required . 
Sub clause 8.12  If the DDI supplementary service is provided to th e served user of the 
MCID supplementary service, then the MCID supplementary service shall 
be provided globally for the whole access. The network option on 
provision for specific ISDN numbers forming part of the DDI 
supplementary service is not supported.  
Sub clause 8.13  The subscription to the DDI supplementary service and the Multiple 
Subscriber Number (MSN) supplementary service is mutually exclusive . 
 
 
B3.6.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information f lows (stage 2 description) for the DDI supplementary 
service are contained in the standard ETS 300 063 [14]. The stage 2 description can be taken 
as informative. The implementation of the DDI supplementary service in Malaysian network shall 
be based on the  stage 1 and stage 3 descriptions.  
 
B3.6.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the DDI supplementary service is contained in the 
standard ETS 300 064 -1 [15].  
 
The following gives the re commended guidelines for the implementation of the DDI supplementary 
service in Malaysian network.  
 
Sub clause 6.1, note  The subscription to the DDI supplementary service and the Multiple Subscriber 
Number (MSN) supplementary service is mutually exclusive  
 
 
B3.7 Calling Line Identification Presentation (CLIP) and Calling Line Identification 
Restriction (CLIR)  
 
B3.7.1  Definition  
 
The  CLIP  supplementary  service  provides  the  called  party  with  the  possibility  of  receiving 
identification of the cal ling party.  
 
The CLIR supplementary service enables the calling party to prevent presentation of its ISDN number 
to the called party.  
  MCMC  MTSFB TC T 009:2014 
30 
 B3.7.2  Service Description  
 
CLIP:  
 
The service description (stage 1 description) for the CLIP supplementary service i s contained in 
the standard ETS 300 089 [16].  
 
The following gives the recommended guidelines for the implementation of the CLIP supplementary 
service in Malaysian network.  
 
 
Sub clauses 6.1, 6.2.3.1, 
7.2, 8.9 and 8.13  In case of two calling party number delivery option a special arrangement for 
not screening the user provided number may be applied. For network wide 
operation ISUP version 2 is required.  
Sub clause 7.1  The CLIP supplementary service is always applicable when interworking to 
non-ISDN has oc curred.  
 
The calling line identity can be provided to called user in the ISDN if the 
identity has been received and it is known that presentation is not restricted.  
 
On calls to or via non -ISDN, the originating network may restrict calling line 
identity from being forwarded to the destination network when the CLIR 
supplementary service is applicable (see also ETS 300 090, sub clause 7.1).  
Sub clause 8.5.2  Technical capabilities to provide override category service have to be 
available in Malaysian networ k.  
Annex A  The two calling party number delivery option is applicable. For network wide 
operation ISUP version 2 is required.  
 
 
CLIR:  
 
The service description (stage 1 description) for the CLIR supplementary service is contained in the 
standard ETS 300  090 [17].  
 
The following gives the recommended guidelines for the implementation of the CLIR supplementary 
service in the Malaysian network.  
Clause 3, and sub clauses 
6.2.3.2 (note 1) and 8.5.1  Technical capabilities to provide override category service have to be 
available in the Malaysian network.  
Sub clause 6.1  Both subscription options, permanent mode and temporary mode 
(defaults presentation restricted and presentation not restricted), are 
offered.  
Sub clause 7.1  On calls to or via non -ISDNs, it ca nnot be assured that a restriction 
indication can be carried to the destination network. The originating 
network in Malaysia may restrict any information identifying the calling 
user from being forwarded to the destination network when the CLIR 
supplementa ry service is applicable  
  MCMC  MTSFB TC T 009:2014 
31 
 B3.7.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information flows  (stage 2 description) for the CLIP  and CLIR 
supplementary services are contained in the standard ETS 300 091 [18]. The stag e 2 description can 
be taken as informative.  The implementation of the CLIP and CLIR supplementary services in 
the Malaysian network shall be based on the stage 1 and stage 3 descriptions.  
 
B3.7.4  Digital Subscriber Signaling System No. One (DSS1) Protoc ol  
 
CLIP:  
 
The DSS1 protocol (stage 3 description) for the CLIP supplementary service is contained in the 
standard ETS 300 092 -1 [19].  
 
The following gives the recommended guidelines for the implementation of the CLIP supplementary 
service in the Malaysi an network.  
 
Sub clauses 6.2 and 9.4  In case of two calling party number delivery option a special arrangement for 
not screening the user provided number may be applied. For network wide 
operation ISUP version 2 is required.  
Sub clause 9.2.1  It is recomm ended for the coding of the calling party information element 
sent by the calling user:  
 
-The "numbering plan identification" field shall be coded "ISDN/Telephony 
numbering plan".  
 
In case DDI is not activated for the same access:  
 
- The "type of number " field shall be coded "subscriber number" and the full 
ISDN subscriber number shall be sent.  
 
In case DDI is activated for the same access:  
 
- The "type of number" field shall be coded "unknown" and only the 
extension number of the calling party shall b e sent. The network then 
completes the calling party number by adding the national number of the 
access to the calling party number information element.  
Sub clause 9.3.1  Networks in Malaysia may accept a full ISDN number in a Calling party 
number informat ion element with the addition of a prefix or escape digits to 
the number digits field and the type of number field set to "National Number".  
Sub clause 9.5.1 and 
Table 1, note 7  The coding of the calling party information element sent by the destination 
local exchange:  
 
- The "numbering plan identification" field shall be coded "ISDN/Telephony 
numbering plan";  
 
-  The "type of number" field shall be coded “unknown", and the number is 
organized according to the network dialing plan.  
  MCMC  MTSFB TC T 009:2014 
32 
 Clause 11  The follo wing option is according to the network rules and operations in Malaysia:  
- The network shall send the Calling party number information element according to  
sub clause9.5.1  fifth paragraph and shall include no Calling party sub address 
information element . 
Annex B  The two Calling party number information elements delivery option is applicable. For 
network wide operation ISUP version 2 is required.  
 
 
CLIR:  
 
The DSS1 protocol (stage 3 description) for the CLIR supplementary service is contained in the 
standard ETS 300 093 -1 [20]. The following gives the recommended guidelines for the implementation 
of the CLIR supplementary service in the Malaysian network.  
 
Clause 11  
On calls to or via non -ISDNs, the originating network may restrict calling line identi ty from being  
forwarded  to  the  destination  network  when  the  CLIR  supplementary  service  is applicable.  
 
B3.8 Connected Line Identification Presentation  (COLP) and Connected Line 
Identification  Restriction (COLR)  
 
B3.8.1  Definition  
 
The COLP supp lementary service provides the calling party with the possibility to receive identification 
of the connected party.  
 
The COLR supplementary service enables the connected party to prevent presentation of its 
ISDN number to the calling party.  
 
B3.8.2  Servi ce Description  
 
COLP:  
 
The service description (stage 1 description) for the COLP supplementary service is contained in 
the standard ETS 300 094 [21].  
 
The following gives the recommended guidelines for the implementation of the COLP supplementary 
service  in the Malaysian network.  
 
 
Sub clauses 6.1, 6.2.3.1, 7.2, 8.9 and 8.13  A special arrangement for not screening the user 
provided number may be applied. For network wide 
operation ISUP version 2 is required.  
Sub clause 7.1  The use of the COLP supplement ary service can be 
guaranteed only when the call is end -to end ISDN.  
Sub clauses 8.5.4 and 8.10  Technical capabilities to provide override category service 
have to be available in ;the Malaysian network  
 
  MCMC  MTSFB TC T 009:2014 
33 
 COLR:  
 
The service description (stage 1 descri ption) for the COLR supplementary service is contained in the 
standard ETS 300 095 [22].  
 
The following gives the recommended guidelines for the implementation of the COLR supplementary 
service in the Malaysian network.  
 
Clause 3, and sub clauses 
6.2.3.2,  8.5.3 and 8.10  Technical  capabilities  to  provide  override  category  service  have  
to  be  available  in  the Malaysian network  
Sub clause 6.1  Both subscription options, permanent mode and temporary mode 
(defaults:  presentation restricted and prese ntation not restricted), 
are offered.  
Sub clause 7.1  Destination network in Malaysia may restrict any information 
identifying the connected party from being returned to the originating 
network when the COLR supplementary service has been invoked.  
 
 
B3.8.3 Functional Capabilities and Information Flows  
 
The functional capa bilities and information flows (stage  2 description) for the COLP and COLR 
supplementary services are contained in the standard ETS 300 096 [23]. The stage 2 description can 
be taken as i nformative. The implementation of the COLP and COLR supplementary services in 
the Malaysian network shall be based on the stage 1 and stage 3 descriptions.  
 
B3.8.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
COLP:  
 
The DSS1 protocol (st age 3 description) for the COLP supplementary service is contained in the 
standard ETS 300 097 -1 [24].  
 
The following gives the recommended guidelines for the implementation of the COLP supplementary 
service in the Malaysian network.  
 
 
Sub clauses 6.3 and  9.4 A special arrangement for not screening the user provided number may be 
applied. For network wide operation ISUP version 2 is required.  
 
Sub clause 9.2.1  It is recommended for the coding of the connected party information element 
sent by the connect ed user:  
 
- The "numbering plan identification" field shall be coded "ISDN/Telephony 
numbering plan";  
 
- The "type of number" field shall be coded "subscriber number" and the full 
ISDN subscriber number shall be sent.  
  MCMC  MTSFB TC T 009:2014 
34 
 Sub clause 9.3.1  Networks in Mala ysia  may accept  a  full  ISDN  number  in  a  Connected  
party  number information element with the addition of a prefix or escape 
digits to the number digits field and the type of number field set to "National 
Number".  
Sub clause 9.5.1 and 
Table 1, not e 7 The coding of the connected party information element sent by the 
originating local exchange: - The "numbering plan identification" field shall be 
coded "ISDN/Telephony numbering plan";  
-  The "type of number" field shall be coded "unknown", and the n umber is 
organized according to the network dialing plan.  
 
COLR:  
 
The DSS1 protocol (stage 3 description) for the COLR supplementary service is contained in the 
standard ETS 300 098 -1 [25].  
 
The following gives the recommended guidelines for the implemen tation of the COLR supplementary 
service in the Malaysian network.  
 
 
Clause 11  Destination network in Malaysia may restrict any information identifying the 
connected party from being returned to the originating network when the COLR 
supplementary service has been invoked.  
 
B3.9 Malicious Call Identification (MCID)  
 
B3.9.1  Definition  
 
The MCID supplementary service enables a user to request that the source of an incoming call 
is identified and registered by the network.  
 
B3.9.2  Service Description  
 
The se rvice description (stage 1 description) for the MCID supplementary service is contained in the 
standard ETS 300 128 [26].  
 
The following gives the recommended guidelines for the implementation of the MCID supplementary 
service in the Malaysian network.  
 
Clause 5  The network will support the registration of calling party sub address.  
Sub clauses 5, 6.1 
and 6.2.3  The network will not support the automatic invocation of the service on 
unanswered calls.  
Sub clause 6.2.3  The network will not support the cont inuation of the call to be presented after 
the calling user has cleared.  
Sub clause 7.1  When interworking between the PSTN and the ISDN occurs and if the number 
of the calling user is not available, the network will support the option of 
registering infor mation about the routing of the call.  
 
The option in the note is not supported.  
  MCMC  MTSFB TC T 009:2014 
35 
 Sub clause 8.9  The network will not provide the service for specific ISDN numbers forming 
part of the DDI supplementary service.  
Sub clauses 8.10.1, 
8.10.2 and 8.10.3  The network will support the registration of the last diverting user.  
Sub clause 8.11  The network will not support the registration of the called free phone 
number  
 
 
B3.9.3  Functional Capabilities and Information Flows  
 
The functional capabilities and infor mation flows (stage 2 description) for the MCID supplementary 
service are contained in the standard ETS 300 129 [27]. The stage 2 description can be taken 
as informative. The implementation of the MCID supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
B3.9.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the MCID supplementary service is contained in the 
standard ETS 300 130 -1 [28]. 
 
The followin g gives the recommended guidelines for the implementation of the MCID supplementary 
service in the Malaysian network.  
 
 
Clause 3  The call information shall include the calling party sub address, if provided by the calling 
user.  
 
 
B3.10 Closed User Group (CUG)  
 
B3.10.1  Definition  
 
The CUG supplementary service enables users to form groups to and from which access is restricted. 
A specific user may be a member of one or more closed user groups. Members of a specific closed 
user group can communicate among t hemselves but not, in general, with users outside the group.  
 
B3.10.2  Service Description  
 
The service description (stage 1 description) for the CUG supplementary service is contained in 
the standard ETS 300 136 [29].  
 
The following gives the recommended  guidelines for the implementation of the CUG supplementary 
service in the Malaysian network.  
 
 
Sub clause 6.1  The maximum number of closed user groups which can be allocated to an individual 
user is 75. All the subscription options defined in this Sub cl ause are supported.  
 
  MCMC  MTSFB TC T 009:2014 
36 
 B3.10.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information flows (stage 2 description) for the CUG supplementary 
service are contained in the standard ETS 300 137 [30]. The stage 2 descriptio n can be taken 
as informative. The implementation of the CUG supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
B3.10.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (s tage 3 description) for the CUG supplementary service is contained in the 
standard ETS 300 138 -1 [31].  
 
The following gives the recommended guidelines for the implementation of the CUG supplementary 
service in the Malaysian network.  
 
 
Sub clause 6.1  All the subscription options defined in this Sub clause are supported.  
Sub clause 9.2.4.1 b)  The return error component shall be retained along with the ETS 300 403 -1 
cause.  
 
 
B3.11 Call Hold (HOLD)  
 
B3.11.1 Definition  
 
The HOLD supplementary service allows a user to interrupt communications on an existing call and 
then subsequently, if desired, re -establish communications.  
 
B3.11.2  Service Description  
 
The service description (stage 1 description) for the HOLD supplementary service is contained in the 
standa rd ETS 300 139 [32].  
 
The following gives the recommended guidelines for the implementation of the HOLD supplementary 
service in the Malaysian network.  
 
 
Clause 5  On the primary rate access, only notifications for the HOLD supplementary 
service are suppor ted. 
Sub clause 6.2.3.1  The network may support the option: A call can be placed on hold after the call 
has been offered to the called user.  
 
The sending of notifications to the remote user is supported.  
Sub clause 6.2.3.2  The sending of notifications t o the remote user is supported.  
Sub clause 7.1, note  If a remote user is a PSTN user, the notifications about the hold request or 
retrieve request of the call to that user are not supported. The last sentence of 
the note is not applicable.  
 
  MCMC  MTSFB TC T 009:2014 
37 
 B3.11.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information flows (stage 2 description) for the HOLD supplementary 
service are contained in the standard ETS 300 140 [33]. The stage 2 description can be taken 
as informative. Th e implementation of the HOLD supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
B3.11.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the HOLD  supplementary service is contained in the 
standard ETS 300 141 -1 [34]. The following gives the recommended guidelines for the implementation 
of the HOLD supplementary service in the Malaysian network.  
Clause 9, and Sub clauses 9.1.1, 9.2.1 and 9.4.1  
 
The user A at the originating side can hold a call in the Call Delivered state (U4).  
 
B3.12 Advice of Charge (AOC)  
 
B3.12.1  Definition  
 
Advice of Charge (AOC) is a group of supplementary services allowing the served user to be informed 
of usage -based chargi ng information.  
 
The AOC group of supplementary services includes the following:  
 
AOC -S Advice of Charge, charging information at call set -up time; AOC -D Advice of Charge, charging 
information during the call; AOC -E Advice of Charge, charging information  at the end of a call.  
 
B3.12.2  Service Description  
 
AOC -S:  
 
The service description (stage 1 description) for the AOC -S supplementary service is contained in the 
standard ETS 300 178 [35].  
 
The following gives the recommended guidelines for the impleme ntation of the AOC -S supplementary 
service in the Malaysian network.  
 
 
Clause 5  The AOC -S supplementary service is applicable only in relation to time tariff setting 
at call establishment and time tariff changes.  
Sub clause 8.16  No charging information f or the use of the Three -Party supplementary service can 
be sent to the served user.  
 
  MCMC  MTSFB TC T 009:2014 
38 
 AOC -D:  
 
The service description (stage 1 description) for the AOC -D supplementary service is contained in the 
standard ETS 300 179 [36].  
 
The following gives the recom mended guidelines for the implementation of the AOC -D supplementary 
service in the Malaysian network.  
 
 
Sub clause 6.2.3  The value of the timer t shall be 10 seconds . 
Sub clause 8.15  The cumulative charging information is given in all the described cases : at 
the suspension request, on the resumption of the call, and if the call is 
terminated while the call is suspended at the calling user's access and the 
calling user attempts to resume the call within the timer  
Sub clause 8.16  No charging information fo r the use of the Three -Party supplementary 
service can be sent to the served user.  
Annex A, Sub clause A.2.1  The Malaysian network may not include some charges, e.g. charges 
incurred by the use of some supplementary services, in the subtotal 
charges and/o r the total charges.  
Annex A, Sub clause A.3  Charging information (AOC) can be given in currency units or metering 
pulses according to access arrangements  
 
 
AOC -E:  
 
The service description (stage 1 description) for the AOC -E supplementary service is con tained in the 
standard ETS 300 180 [37].  
 
The following gives the recommended guidelines for the implementation of the AOC -E supplementary 
service in the Malaysian network.  
 
Sub clause 8.4  After a call has been transferred and the transferring user is cha rged for 
that transferred part of the call, and the AOC -E supplementary service has 
been invoked for that call, then the charging information shall be sent to 
the transferring user when the call is terminated.  
Sub clauses 8.10.1, 8.10.2 
and 8.10.3  Forward ing user:  
When a call is forwarded and the forwarding user is charged for the 
forwarded part of the call, then the charging information shall be sent to the 
forwarding user when the call is terminated provided that the served user 
has subscribed to the AO C-E supplementary service with the value of the 
subscription option set to "for all calls automatically".  
Sub clause 8.15  If the call is terminated while the call is suspended at the calling user's 
access, and if the calling user attempts to resume the ca ll within the timer, 
then advice of charge information shall be given to that user at the time of 
the resume attempt.  
Sub clause 8.16  No charging information for the use of the Three -Party supplementary 
service can be sent to the  served user.  
  MCMC  MTSFB TC T 009:2014 
39 
 Annex A, Sub clause A.2.1  The Malaysian network may not include some charges, e.g. charges 
incurred by the use of some supplementary services, in the subtotal 
charges and/or the total charges.  
Annex A, Sub clause A.3  Charging information (AOC) can be given in curr ency units or metering 
pulses according to access arrangements.  
 
 
B3.12.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information flows (stage 2 description) for the AOC supplementary 
service are contained in the standar d ETS 300 181 [38]. The stage 2 description can be taken 
as informative. The implementation of the AOC supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
B3.12.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the AOC supplementary service is contained in the 
standard ETS 300 182 -1 [39]. The AOC supplementary service is implemented in the Malaysian 
network without national definitions or exception s.  
 
B3.13 Three Party (3PTY)  
 
B3.13.1  Definition  
 
The 3PTY supplementary service enables a user to establish, participate in and control, a three -
way conversation, i.e. a simultaneous communication involving the served user and two remote parties.  
 
B3.13.2 Service Description  
 
The service description (stage 1 description) for the 3PTY supplementary service is contained in the 
standard ETS 300 186 [40].  
 
The following gives the recommended guidelines for the implementation of the 3PTY supplementary 
servic e in the Malaysian network.  
 
Sub clause 6.2.3.1  Establishing a three -way conversation that would include calls which are not 
intended for speech communication is not prevented . 
Sub clauses 8.1.1, 8.1.2 
and 8.1.3  No charging information for the use of the  Three -Party supplementary service 
can be sent to the served user.  
Sub clause 8.16  A remote party in a three -way conversation can invoke the 3PTY 
supplementary service in order to make their connection to the three -way 
conversation a part of another three -way conversation controlled by that 
remote party.  
 
 
B3.13.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information flows (stage 2 description) for the 3PTY supplementary 
service are contained in the standard ETS 300 18 7 [41]. The stage 2 description can be taken 
as informative. The implementation of the 3PTY supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  MCMC  MTSFB TC T 009:2014 
40 
 B3.13.4  Digital Subscriber Signaling System No. One (DSS1) P rotocol  
 
The DSS1 protocol  (stage 3 description) for the 3PTY supplementary service is contained in the 
standard ETS 300 188 -1 [42].   The 3PTY supplementary service is implemented in the Malaysian 
network without national definitions or exceptions.  
 
B3.14 Call Forwarding (CFB, CFU, CFNR)  
 
B3.14.1 B  
Definition  
 
The Call Forwarding supplementary services comprise the following services:  
-Call Forwarding Busy (CFB);  
-Call Forwarding Unconditional (CFU);  
-Call Forwarding No Reply (CFNR).  
 
The CFB supplementa ry service enables a served user to have the network redirect to another user 
calls which are addressed to the served user´s ISDN number and meet busy.  
 
The CFU supplementary service enables a served user to have the network redirect to another user 
calls which are addressed to the served user´s ISDN number.  
The CFNR supplementary service enables a served user to have the network redirect to another 
user call which are addressed to the served user´s ISDN number, and for which the connection 
is not establi shed within a defined period of time.  
 
B3.14.2  Service Description  
 
CFB:  
 
The service description (stage 1 description) for the CFB supplementary service is contained in 
the standard ETS 300 199 [45].  
 
The following gives the recommended guidelines for the implementation of the CFB supplementary 
service in the Malaysian network.  
 
 
Clause 5 and Sub clause 6.2.3  The maximum number for call diversions is 5 for each call.  
Sub clause 7.1  Once a call has been forwarded to a non -ISDN network the indication 
call forwarded is used.  
 
Once a call arrives at an ISDN network from a non -ISDN network 
with the indication forwarded call the call forwarding counter will be 
set to one, if no other value for the call forwarding counter is supplied.  
Sub clause 8.17  Forwar ding any UUI or request for UUS may be restricted to 
forwarding users who subscribe to the relevant parts of the UUS 
supplementary service.  
 
  MCMC  MTSFB TC T 009:2014 
41 
  
CFU:  
 
The service description (stage 1 description) for the CFU supplementary service is contained in the 
standard ETS 300 200 [46].  
 
The following gives the recommended guidelines for the implementation of the CFU supplementary 
service in the Malaysian network.  
 
 
Clause 5 and Sub clause 6.2.3  The maximum number for call diversions is 5 for each call.  
Sub claus e 7.1  Once a call has been forwarded to a non -ISDN network the indication 
call forwarded is used . 
 
Once a call arrives at an ISDN network from a non -ISDN network 
with the indication forwarded call the call forwarding counter will be 
set to one, if no other  value for the call forwarding counter is supplied.  
Sub clause 8.17  Forwarding any UUI or request for UUS may be restricted to 
forwarding users who subscribe to the relevant parts of the UUS 
supplementary service.  
 
 
CFNR:  
 
The service description (stage  1 description) for the CFNR supplementary service is contained in 
the standard ETS 300 201 [47].  
 
The following gives the recommended guidelines for the implementation of the CFNR supplementary 
service in the Malaysian network.  
 
 
Clause 5 and Sub clause 6.2.3  The maximum number for call diversions is 5 for each call.  
Sub clause 6.1  The value of 30 seconds will be used for the no reply timer.  
Sub clauses 6.2.3.1 and 6.3.3  The method b) is used.  The call  to  the  served  user  will  be  
cleared  when  t he  CFNR supplementary service is invoked. If the 
forwarded call cannot be completed the call shall be terminated.  
Sub clause 7.1  Once a call has been forwarded to a non -ISDN network the 
indication call forwarded is used.  
 
Once a call arrives at an ISDN network from a non -ISDN network 
with the indication forwarded call the call forwarding counter will be 
set to one, if no other value for the call forwarding counter is 
supplied.  
  MCMC  MTSFB TC T 009:2014 
42 
 Sub clause 8.17  Forwarding any UUI or request for UUS may be restricted to forwarding users 
who subscribe to the relevant parts of the UUS supplementary service.  
 
If the calling user requests service 1 and indicates that it is not required on the 
call, then if the called user has explicitly accepted the request, the request for 
the call forwarding no reply supplementary service will be rejected and the call 
shall not be forwarded.  
Annex A  The following service provider option in the note is supported: the request for 
the call forwarding no reply supplementary service will be rej ected and the call 
will not be forwarded.  
 
 
B3.14.3  Functional Capabilities and Information Flows  
 
CFB:  
 
The functional capabilities and information flows (stage 2 description) for the CFB supplementary 
services are contained in the standard ETS 300 203  [48]. The stage 2 description can be taken 
as informative. The implementation of the CFB supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
CFU:  
 
The functional capabilities and information flows (sta ge 2 description) for the CFU supplementary 
services are contained in the standard ETS 300 204 [49]. The stage 2 description can be taken 
as informative. The implementation of the CFU supplementary service in the Malaysian network shall 
be based on the sta ge 1 and stage 3 descriptions.  
 
CFNR:  
 
The functional capabilities and information flows (stage 2 description) for the CFNR supplementary 
services are contained in the standard ETS 300 205 [50]. The stage 2 description can be taken 
as informative. The im plementation of the CFNR supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
B3.14.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the Call Forw arding supplementary services is contained in  
the standard ETS 300 207-1 [51]. 
 
The following gives the recommended guidelines for the implementation of the Call Forwarding 
supplementary services in the Malaysian network.  
 
 
Clause 5  The diversion supplemen tary services are provided on a per ISDN number 
basis.  
 
The call forwarding services can be subscribed collectively for all the basic 
services to which the user(s) subscribes.  
  MCMC  MTSFB TC T 009:2014 
43 
 Sub clause 6.1  The subscription options listed in the table 1 are provided.  
 
In the table 2 the following network provider option values are applicable:  
 
-served user call is cleared on invocation of diversion;  
-maximum number of diversions for a single call is 5;  
-call forwarding on no reply timer value is 20 s;  
-partial rerouti ng is provided at the T reference point.  
Sub clause 9.1.1.1  The forwarding exchange shall verify the forwarded -to number only for a 
limited set of numbers; the minimum requirement is that emergency 
numbers are not accepted as forwarded to numbers  
Sub cla uses 9.2.3.1 and 
9.2.5.1  The type of the number shall be set to "unknown" and the number is 
organized according to the network dialing plan.  
Sub clause 9.2.4.4.1 and 
clause 13  The value of T -CFNR is 20 s.  
Sub clause 9.2.4.4.1  The network provider option "served user call retention on invocation of 
diversion" is "clear call on invocation"  
Sub clauses 10.4.1 and 
10.5.1  If a diverted call is presented from a private network to the public network, 
then the public network is required to check the redirecting number from the 
SETUP message. The number shall be checked against the numbering 
space of the private network. In case of a mismatch the redirecting  number  
shall  be  replaced  by the  default  number  associated  with  the  private 
network.  
 
It is reco mmended for the coding of the redirecting number information sent 
by the private network:  
The "numbering plan identification" field shall be coded "ISDN/Telephony 
numbering plan". In case DDI is not activated for the same access:  
The "type of number" fie ld shall be coded "subscriber number" and the full 
ISDN subscriber number shall be sent.  
 
In case DDI is activated for the same access:  
-The "type of number" field shall be coded "unknown" and only the 
extension number of the redirecting number shall be sent. The network then 
completes the redirecting number by adding the national number of the 
access to the redirecting number information.  
Sub clause 10.5.1  The public network shall clear the call towards the private network on 
acceptance of the call rero uting request.  
 
  MCMC  MTSFB TC T 009:2014 
44 
 B3.15 User -to-User Signaling (UUS)  
 
B3.15.1  Definition  
 
The UUS supplementary service enables a user to send/receive a limited amount of information to/from 
another user over the signaling channel in association with a call to the other user. This information 
shall be passed transparently (i.e. without modification of contents) through the network. The network 
shall not interpret or act upon this information.  
 
The user can transfer UUI in different phases of the call depending on the ser vice(s) to which the user 
subscribes. These services are:  
 
 
a) Service 1  - User-to-user information exchanged during the set -up and clearing phases of a 
call/connection, by transporting the User -to-user information element within 
call/connection control m essages ; 
b) Service 2  - User-to  user  information  exchanged  from  the  sender’s  point  of  view  
during call/connection establishment, between the ALERTING and CONNECT 
messages, within USER INFORMATION messages; and  
c) Service 3  - User-to-user inform ation exchanged while a call/connection is in the Active 
state, within USER INFORMATION messages.  
 
 
B3.15.2  Service Description  
 
The service description (stage 1 description) for the UUS supplementary service is contained in the 
standard ETS 300 284 [52].  
 
The following gives the recommended guidelines for the implementation of the UUS supplementary 
service in the Malaysian network.  
 
 
Clause 5  Service provider option for service 2, UUI sent by the calling user prior to receiving 
the acceptance of the call  by the called user may be delivered to the called user 
after the call has been established, is supported.  
 
Note on limitation of UUI to only 32 octets during an interim period of time is not 
applicable for the Malaysian network.  
Sub clause 6.1  Service p rovider option about provision of one or any combination of services is 
supported. Service provider option about withdrawal separately per service is 
supported.  
Sub clause 6.2.1.3  Service provider option about activation of service 3 by the called user af ter the 
connection has been established is supported.  
Sub clause 6.3.3  In case of excessive UUI length the sending user shall be informed.  
Clause 7  Service provider option about explicit acceptance, if the remote user replies with 
UUI to explicit request  sent to an ISDN only supporting implicit requests, is 
supported.  
  MCMC  MTSFB TC T 009:2014 
45 
 Sub clauses 8.10.1, 
8.10.2 and 8.10.3  Forwarding any UUI or request for UUS may be restricted to forwarding users 
who subscribe to the relevant parts of the UUS supplementary service.  
Sub clause 8.10.3  If the calling user requests service 1 and indicates that it is not required on the 
call, then if the called user has explicitly accepted the request, the request for the 
call forwarding no reply supplementary service will be rejected and t he call shall 
not be forwarded.  
Annex A  The following service provider option in the note is supported: the request for the 
call forwarding no reply supplementary service will be rejected and the call will not 
be forwarded.  
 
 
B3.15.3  Functional Capabilit ies and Information Flows  
 
The functional capabilities and information flows (stage 2 description) for the UUS supplementary 
service are contained in the standard ETR 285 [53].  The stage 2 description can be taken  as 
informative. The implementation of th e UUS supplementary service in the Malaysian network shall be 
based on the stage 1 and stage 3 descriptions.  
 
B3.15.4  Digital Subscriber Signaling System No. One (DSS1) Protocol  
 
The DSS1 protocol (stage 3 description) for the UUS supplementary service i s contained in 
the standard ETS 300 286 -1 [54].  
 
The following gives the recommended guidelines for the implementation of the UUS supplementary 
service in the Malaysian network.  
 
 
Sub clause 6.1  Any combination of the following possibilities can be provid ed separately or 
globally:  
-service 1 implicit, or service 1 implicit together with service 1 explicit;  
-service 2;  
-service 3.  
Sub clauses 9.2.2.1 
and 9.2.2.2  The calling network shall accept the first two USER INFORMATION messages 
from the calling user  and the calling network shall deliver them to the called user 
after the calling and called network have entered the Active (N10) call state.  
Sub clause 9.2.2.2  The calling network shall send a STATUS message with cause #43 to the 
calling user when discar ding the USER INFORMATION message.  
 
The called network shall send a STATUS message with cause #43 to the called 
user when discarding the USER INFORMATION message.  
Sub clause 9.3.1.2.1  During the Active (U10) call state, the calling user or the called use r can activate 
service 3.  
Sub clause 9.3.2.2  The sending network shall send a STATUS message with cause #43 to the 
sending user when discarding the USER INFORMATION message.  
  MCMC  MTSFB TC T 009:2014 
46 
 B3.16 Explicit Call Transfer (ECT)  
 
B3.16.1  Definition  
 
The ECT supplementary service enables a user (user A) to transform two of that user’s calls (an 
active call and a held call), each of which can be an incoming call or an outgoing call, into a new call 
between user B and user C.  
 
B3.16.2  Service Description  
 
The service descri ption (stage 1 description) for the ECT supplementary service is contained in 
the standard ETS 300 367 [55].  
 
The following gives the recommended guidelines for the implementation of the ECT supplementary 
service in the Malaysian network.  
 
Clause 5 and Su b 
clause 6.2.3  The service provider option, that the ECT supplementary service can be 
invoked after user C has been informed of the call (i.e. an outgoing call from 
A to user C, where the connection has not yet been established), is 
supported.  
Sub clause 8.1.3  When the call is transferred and the transferring user is charged for the 
transferred part of the call, then the charging information shall be sent to the 
transferring user when the transferred call is terminated provided that the 
served user has act ivated the AOC -E supplementary service for that call.  
 
B3.16.3  Functional Capabilities and Information Flows  
 
The functional capabilities and information flows (stage 2 description) for the ECT supplementary 
service are contained in the standard ETS 300 368 [56]. The stage 2 description can be taken 
as informative. The implementation of the ECT supplementary service in the Malaysian network shall 
be based on the stage 1 and stage 3 descriptions.  
 
B3.16.4  Digital Subscriber Signaling System No. One (DSS1)  Protocol  
 
The DSS1 protocol (stage 3 description) for the ECT supplementary service is contained in the 
standard ETS 300 369 -1 [57].  
 
The following gives the recommended guidelines for the implementation of the ECT supplementary 
service in the Malaysian network.  
 
Clause 5 and Sub clause 9.2.5  The network option to allow the invocation of the ECT service when 
one of the calls is an outgoing call in the Call delivered (alerting) 
state is supported.  
Sub clause 9.2  The explicit linkage procedure is supporte d. 
Sub clause 10.3  The “mechanism to avoid looping of uncontrolled circuits” is 
supported by the public network. If the loop prevention procedure 
cannot decide whether the resulting connection would result in a 
loop, the call transfer is completed.  
The t ime supervision for the loop prevention procedure is 2 
seconds.  
  MCMC  MTSFB TC T 009:2014 
47 
 B3.17 Supplementary Service Interactions  
 
The public network shall support protocol interaction between the various supplementary services 
according to ETS 300 195 -1 [43]. Network options o f ETS 300 195 -1 are left as implementation 
options, unless stated otherwise in the Sub clauses relating to the individual supplementary 
services. Should any conflict arise between ETS 300 195 -1 and the specifications in Sub clause 3.2 
to 3.16, then the tex t of the individual supplementary services shall be taken as definitive.  
 
 MCMC  MTSFB TC T 009:2014 
48 
 Annex C  
(Normative)  
 
Amendments  
 
Amendments to SKMM FTS ISDN -PA Rev. 1.01:2007  
Page  Clause  Items Amended  
Cover  - The document has adopted new numbering system and cover page. 
It has been renumbered as “MCMC MTSFB TC T00 9:2014”.  
 
i - Explanatory note on the development of Technical Codes has been 
included.  
 
1 1.2 Reference for Section D has been replaced with EN 300 403 -1 
11/99.  
 
2 2 New clause  on normative references  has been included . 
 
2 3 The abbreviations have been updated.  
 
3 4.1 Power supply requirements have been revised based on the 
Information Booklet 2012 Edition, Approval of Electrical Equipment, 
issued by the Energy Commission.  
 
4 4.1  
(Figure 2)  Alphanumeric keyp ad layout has been included.  
4 4.2.1  New clause on n etwork interface specifications  has been included . 
 
- - Old c lause 2.2 on analogue interface has be en re moved.  
 
- - Old c lause 2.3  on characteristics of telephone  has been removed.  
 
4 4.3 New clause o n interoperability requirement has been included.  
 
12 Section D  Network layer requirements have been revised  to be  based on EN 
300 403 -1 11/99, Integrated Services Digital Network (ISDN): Digital 
Subscriber Signaling System No.  One (DSS1) protocol: Signa ling 
network layer for circuit -mode basic call control; Part 1: Protocol 
Specification [ITU -T Recommendation Q.931 (1993), modified].  
 
19 Annex A  The normative references have been updated.  
 
20 Annex B  Technical guidelines of ISDN supplementary service h ave been 
included.  
 
 
 MCMC  MTSFB TC T 009:2014 
49 
 Acknowledgements  
 
 
Members of Fixed Terminal Working Group  
 
 
Mr Abd. Hamid Mustafa (Chairman)  Telekom Malaysia Berhad  
Mr Ahmad Faizan Pardi (Vice Chairman)  SIRIM QAS International Sdn Bhd  
Mrs Nur Rashidah Abas Azmi (Secretary)  Telekom Malaysia Berhad  
Mr Shahadan Man  AJV Ho lding Sdn. Bhd.  
Mr Zulkhairi Zainal Abidin  Epson Malaysia  
Mr Tan Keok Kuang  NEC Corporation of Malaysia Sdn. Bhd  
Mr Khairul Akmal Zahri  Packet One Networks Sdn. Bhd.  
Mr Syed Ahmad Anas   Packet One Networks Sdn. Bhd.  
Mr Sam Choong  Panasonic Malaysi a 
Mr Pang Chieng Yong   Panasonic Malaysia  
Mr Mohd Ackmal Abd. Samad  Panasonic System Networks  
Mrs Hafizah Zainal Abiddin  SIRIM QAS  International Sdn Bhd  
Mrs Nurhafenah Abdul Jalil  
Mr Zul Jaafar   SIRIM QAS  International Sdn Bhd  
SIRIM QAS  International Sdn Bhd  
Mr Amin Hapis Khairan  Telekom Malaysia Berhad  
Mr Anuar Wahab   Telekom Malaysia Berhad  
Mrs Badariah Zainal  Telekom Malaysia Berhad  
Mr Md Azmi Karnain  Telekom Malaysia Berhad  
Mr Mohd Syaukiazahar   Telekom Malaysia Berhad  
Mr Muhd Hadzir Abu Hassan   Telekom Malaysia Berhad  
Mrs Nor Maizatul Syima   Telekom Malaysia Berhad  
Mrs Nur Faliza Yaakup   Telekom Malaysia Berhad  
Mr Rahmat Fauzi Zainal   Telekom Malaysia Berhad  
Mrs Raja Nor Suha   Telekom Malaysia Berhad  
Mrs Rosliza Abu Bakar   Telekom Malaysia Berhad  
Mrs Suriyati Rahim   Telekom Malaysia Berhad  
Ms Wan Nur Hanani   Telekom Malaysia Berha d 
Mr Othman Sidek  TIME dot Com Berhad