PHS MoU Document
B-IF2.53-01-TS
Title: Public Personal Handy-Phone System : Public Cell Station ISDN Interface- Calling User Identification Presentation (CUIP) - Calling User Identification Restriction (CUIR) Version: 01
Date: December 19, 1997
PHS MoU Classification: Unrestricted
List of contents:
1.
2.

Calling User Identification Presentation (CUIP)
Calling User Identification Restriction (CUIR)

Number of pages: 20

PHS MoU Group
c/o Association of Radio Industries and Businesses (ARIB)
14F, Nittochi Bldg., 4-1, Kasumigaseki 1-choume, Chiyoda-ku, Tokyo 100, Japan
TEL +81-3-5510-8599 FAX +81-3-3592-1103© PHS MoU Group1997

PHS MoU Document
B-IF2.53-01-TS
Version01

History of Revised Versions
Date
OutlineDec. 19, 1997 EstablishedB-IF2.53-01-TS
Public Personal Handy-Phone System
Public Cell Station - ISDN Interface- Calling User Identification Presentation (CUIP) - Calling User Identification Restriction (CUIR) <Summary>
1. Relations with international standards
This specification is based on ITU-T Recommendation Q.951.3 and Q.951.4.
2. Differences from ITU-T Recommendation Q.951.3 and Q951.4.
The differences between this specification and ITU-T Recommendation are summarized in thefollowing.
(1) Common terms
The following terms used in ITU-T Recommendation Q.951 shall be partly replaced with those of thisspecification.
Table Summary-1/B-IF2.53
Different terms between this specification and ITU-T Recommendation Q.951
ITU-T Recommendation Q.951
Calling Line Identification Presentation
Calling Line Identification Restriction
CLIP
CLIR
ISDN number
Recommendation
Recommendation E.164
Recommendation I.251
Q.931
ISDN
network
network
ISDN number
numbercalled user
called user
calling user
calling user
calling line
user
user

This specification terminology
Calling User Identification Presentation
Calling User Identification Restriction
CUIP
CUIR
PHS number
document
ITU-T Recommendation E.164
B-SV2.00
B-IF2.02
PSC
PSC
public PHS ISDN part
PHS number
PHS number
called PS
called public CS
calling PS
calling public CS
calling PSPSpublic CS

B-IF2.53-01-TS(1)(2) Differences
Table Summary-2/B-IF2.53
Differences from ITU-T Recommendation Q.951
Items
Specific terminology

Numbering plan identification

Type of number

Override category
Signalling requirements

Differences
Reasons
The ‘default number’ is not usedA ‘default number’ is deleted.
And related descriptions are in PHS.
deleted.
A ‘special arrangement’ is The arrangement does not exist
in PHS.
deleted.
And related descriptions aredeleted.
In PHS MoU specification, theA ‘unknown’ is deleted.
And related descriptions are ‘unknown’ is not defined.
deleted.
A ‘subscriber number’ is deleted. In PHS MoU specification, theAnd related descriptions are ‘subscriber number’ is notdefined.
deleted.
A ‘override’ category is deleted. The category does not exist inPHS.
All descriptions are revised.
Descriptions are revised for
CUIP/CUIR
ofPHS
supplementary service.
And the behaviors for ‘the public
CS Type 1 in B-NW1.00’ and‘the public CS Type 2’ aredifferent, so description about them
are described separately.

Interaction
withsupplementary services

other All descriptions are revised.

Dynamic description

All figures are revised.

ISDN supplementary services are
replaced to PHS supplementary
services.
Figuresarerevisedfor
CUIP/CUIR
ofPHS
supplementary service.
And the behaviors for ‘the public
CS Type 1 in B-NW1.00’ and‘the public CS Type 2’ aredifferent, so figures about them aredescribed separately.

Annex A(2)

B-IF2.53-01-TS

Annex A is deleted.

Two Calling party number
information elements delivery
option does not exist in PHS.

3. References
ITU-T Recommendation Q.951.3, Q.951.4
PHS MoU Specification B-SV2.00
4. Items for Further Study
1.7.2 Interaction with non-ISDNs
On calls incoming from some non-ISDNs, the calling number may be delivered to the destination
PSC without an indication of calling line identity restriction. This case is for further study.

B-IF2.53-01-TS(3)

B-IF2.53-01-TS
Public Personal Handy-Phone System
Public Cell Station - ISDN Interface- Calling User Identification Presentation (CUIP) - Calling User Identification Restriction (CUIR) Contents

Page

1. Calling User Identification Presentation (CUIP) ..........................................................................

1

1.1 Definition ..............................................................................................................................

1

1.2 Description ............................................................................................................................

1

1.3 Operational requirements......................................................................................................

2

1.4 Coding requirements .............................................................................................................

2

1.5 Signalling requirements ........................................................................................................

2

1.6 Interaction with other supplementary services .....................................................................

5

1.7 Interaction with other networks ............................................................................................

7

1.8 Signalling flows ....................................................................................................................

8

1.9 Parameter values (timers) .....................................................................................................

8

1.10 Dynamic description .............................................................................................................

8

2. Calling User Identification Restriction (CUIR) ............................................................................ 13
2.1 Definition .............................................................................................................................. 13
2.2 Description ............................................................................................................................ 13
2.3 Operational requirements...................................................................................................... 13
2.4 Coding requirements ............................................................................................................. 14
2.5 Signalling requirements ........................................................................................................ 14
2.6 Interaction with other supplementary services ..................................................................... 15
2.7 Interaction with other networks ............................................................................................ 17
2.8 Signalling flows .................................................................................................................... 18
2.9 Parameter values (timers) ..................................................................................................... 18
2.10 Dynamic description ............................................................................................................. 18

B-IF2.53-01-TSi1. Calling User Identification Presentation (CUIP)
1.1 Definition
Calling User Identification Presentation (CUIP) is a supplementary service offered to the called party
which provides the calling party’s PHS number, possibly with sub-address information to the called
party.
1.2 Description
1.2.1 General description
This supplementary service provides the ability of indicating the PHS number of the calling PS, withpossible additional sub-address information (i.e. the Calling party sub-address information element),
to the called party.
The information provided to the called PS consists of the PHS number of the calling PS in a form
sufficient to allow the returning of the call (i.e. a national number or an international number andoptionally a sub-address if provided by the calling PS).
1.2.2 Specific terminology
For the purposes of this document, the following terms apply:
A served PS is the PS of a particular PHS number who has subscribed to the presentation of thecalling user identification information in association with incoming calls. The served PS is also
known as the called PS.
A calling PS is the PS that initiated an incoming call at the served PS. The calling PS need not havesubscribed to the CUIP supplementary service.
A PHS number is a number conforming to the numbering plan structure specified in ITU-T
Recommendation E.164.
An address is the number of the calling PS (normally PHS number), and a sub-address if provided bythat PS.
A calling public CS (cell station) is the public CS which has the radio area where the calling PS is
visiting.
A called public CS (cell station) is the public CS which has the radio area where the called PS is
visiting.
An international number is an ISDN number structured as specified in ITU-T Recommendation
E.164.
A national number; national significant number is an ISDN number structured as specified in ITU-T
Recommendation E.164.

B-IF2.53-01-TS

1

CUIP
CUIR

Calling User Identification Presentation
Calling User Identification Restriction

1.2.3 Qualification on the applicability to telecommunication services
See B-SV2.00.
1.2.4 State definitions
No specific state definitions are required.
1.3 Operational requirements
1.3.1 Provision/withdrawal
See B-SV2.00.
1.3.2 Requirements on the originating PSC side
All information pertaining to CUIP, shall be inserted in the SETUP message sent as part of the basic
call procedures according to 5/B-IF2.02 (Q.931).
In the case where no information is provided by the calling public CS (as part of the basic callprocedures) the PSC shall release the call.
When the calling party information is provided by the public CS, the PSC may only verify that the
PHS number is within the range allocated to that PS.
1.3.3 Requirements in the public PHS ISDN part
This subclause is not applicable.
1.3.4 Requirements on the destination PSC side
See 1.5.2.3.
1.4 Coding requirements
All information pertaining to CUIP is inserted in the SETUP message. 4.5.10/B-IF2.02 (Q.931) and
4.5.11/B-IF2.02 (Q.931) give the coding for the Calling party number and Calling party sub-address
information elements which are required to support this service. The purpose of the Calling party
number information element is to identify the origin of a call. The purpose of the Calling party subaddress information element is to identify a sub-address associated with the origin of the call.
1.5 Signalling requirements
1.5.1 Activation/deactivation/registration
Not applicable.

2

B-IF2.53-01-TS

1.5.2 Invocation and operation
1.5.2.1 Actions at the originating local exchange
1.5.2.1.1 Normal operation
1.5.2.1.1.1 Actions at the originating public CS
These procedures shall be provided as part of the basic service and the calling PS need not havesubscribed to the CUIP supplementary service.
The numbering plan identification, to be indicated with the Calling party number information
element, sent by the calling public CS, shall be “ISDN/telephony numbering plan” (see ITU-T
Recommendation E.164).
Where the calling PHS number included by the calling public CS is complete the type of number tobe indicated within the Calling party number information element, sent by the calling public CS, shallbe one of the following:“National number” - In the case where the complete national number is sent.
“International number” - In the case where the complete international number issent.
1.5.2.1.1.2 Actions at the originating local exchange
These procedures shall be provided as part of the basic service and the calling PS need not havesubscribed to the CUIP supplementary service.
When a SETUP message is received from the calling public CS, the PSC shall check to see if the
Calling party number and Calling party sub-address information elements are included.
If the Calling party number information element is received with a coding of the numbering plan
identification field other than “ISDN/telephony numbering plan” (see ITU-T Recommendation E.164), then the PSC shall release the call.
If the SETUP message does not contain the Calling party number information element, the PSC shallrelease the call.
The PSC or the calling public CS shall set the value of the screening indicator based on the outcomeof the screening of the calling PHS number.
[public CS Type 1 in B-NW1.00]
If the PSC received the Calling party number information element from the calling public CS, the
PSC shall perform the screening function. (One of the screening function is an authentication.)If the calling PHS number received from the calling public CS is determined to be correct, the PSC
shall set the screening indicator to “user-provided, verified and passed”.
If the screening function fails, the PSC shall release the call.
[public CS Type 2 in B-NW1.00]

B-IF2.53-01-TS

3

If the PSC receives the SETUP message which does not include the screening indicator from thecalling public CS, the PSC shall release the call.
If the PSC receives the SETUP message which included the screening indicator from the calling
public CS, the PSC shall set the value of that screening indicator. (Because the calling public CS has
already performed the screening function.)
The information determined by the procedures above ( in case of CS Type 1 and CS Type 2), shall be
forwarded to the destination local exchange, in association with the basic call request.
The presentation indicator, as determined by the procedures of the CUIR supplementary service, shallbe forwarded to the destination local exchange, in association with the basic call request.
If the Calling party sub-address information element is available, it shall be passed transparently
through the PSC.
1.5.2.1.2 Exceptional operation
Not applicable.
1.5.2.2 Action at the transit exchangeThis subclause is not applicable.
1.5.2.3 Actions at the destination local exchange
1.5.2.3.1 Normal operation[public CS Type 1 in B-NW1.00]
When the PSC sends a SETUP message to the called public CS and if the called PS is provided with
the CUIP supplementary service, the PSC shall check to see if the calling number is available.
If the calling number is available and presentation is allowed according to the presentation indicator
supplied together with the calling number, the PSC shall include the Calling party number
information element in the SETUP message sent to the called public CS. If provided, the PSC shallalso include the Calling party sub-address information element in the SETUP message. The
presentation and screening indicators associated with the calling number, and the calling sub-address,
received at the destination exchange, shall be passed transparently to the called public CS.
The numbering plan identification field shall be coded “ISDN/telephony numbering plan” (see ITU-T
Recommendation E.164).
If presentation is not allowed according to the presentation indicator supplied together with thecalling number, the PSC may not include the Calling party number information element in the
SETUP message sent to the called public CS.
If the calling number is not available at the destination local exchange the PSC may not include theCalling party number information element in the SETUP message sent to the called public CS.

4

B-IF2.53-01-TS

If the called PS is not provided with the CUIP supplementary service, then neither the Calling party
number nor the Calling party sub-address information elements shall be included in the SETUP
message sent to the called public CS.
[public CS Type 2 in B-NW1.00]
When the PSC sends a SETUP message to the called public CS, the PSC shall check to see if thecalling number is available.
If the calling number is available and presentation is allowed according to the presentation indicator
supplied together with the calling number, the PSC shall include the Calling party number
information element in the SETUP message sent to the called public CS. If provided, the PSC shallalso include the Calling party sub-address information element in the SETUP message. The
presentation and screening indicators associated with the calling number, and the calling sub-address,
received at the destination exchange, shall be passed transparently to the called public CS.
The numbering plan identification field shall be coded “ISDN/telephony numbering plan” (see ITU-T
Recommendation E.164).
If presentation is not allowed according to the presentation indicator supplied together with thecalling number, the PSC may include the Calling party number information element in the SETUP
message sent to the called public CS. The presentation indicator in the Calling party number
information element shall indicate “presentation restricted”. The screening indicator shall be sent to
the public CS as received at the destination PSC.
The PSC shall include digits field. The PSC shall include the Calling party sub-address information
element in the SETUP message.
If the calling number is not available at the destination local exchange the PSC may not include theCalling party number information element in the SETUP message sent to the called public CS.
1.5.2.3.2 Exceptional procedures
Not applicable.
1.6 Interaction with other supplementary services
1.6.1 DTMF Transmission
No interaction.
1.6.2 HandoverNo interaction.
1.6.3 User scrambling
No interaction.

B-IF2.53-01-TS5

1.6.4 Subaddress
No interaction
1.6.5 Calling User Identification Presentation (CUIP)
No interaction.
1.6.6 Calling User Identification Restriction (CUIR)
The calling user identification will not be presented if the calling PS has an arrangement to inhibit thepresentation of his number(s) to the called party (calling PS subscribes to the supplementary service“Calling User Identification Restriction”).
1.6.7 Call Forwarding
1.6.7.1 Call Forwarding Unconditional (CFU)
As specified in B-IF2.52.
1.6.7.2 Call Forwarding on PS Busy (CFB)As specified in B-IF2.52.
1.6.7.3 Call Forwarding on No Reply (CFNRy)
As specified in B-IF2.52.
1.6.7.4 Call Forwarding on PS Not Reachable (CFNRc)
As specified in B-IF2.52.
1.6.8 Call Barring
1.6.8.1 Barring of All Outgoing Calls (BAOC)
No interaction.
1.6.8.2 Barring of Outgoing International Calls (BOIC)
No interaction.
1.6.8.3 Barring of Outgoing International Calls Except Call to Home Country (BOIC-exHC)
No interaction.
1.6.8.4 Barring of All Incoming Calls (BAIC)

6

B-IF2.53-01-TS

No interaction.
1.6.8.5 Barring of Incoming Calls on Roaming outside Home Country (BIC-roam)
No interaction.
1.6.9 Roaming
Further Study
1.6.10 PHS-UUS
1.6.10.1 Service 1
No interaction.
1.6.10.2 Service 2
No interaction.
1.6.10.3 Service 3
No interaction.
1.7 Interaction with other networks
1.7.1 Interaction with ISDNs
1.7.1.1 Actions at the originating local exchanges in ISDN
See ITU-T Recommendation Q.951.
1.7.1.2 Actions at the transit exchanges in ISDNThis subclause is not applicable.
1.7.1.3 Action at the destination exchanges in PHS
See 1.5.2.3.
1.7.2 Interaction with non-ISDNs
On calls incoming from some non-ISDNs, the calling number may be delivered to the destination
PSC without an indication of calling line identity restriction. This case is for further study.
For some other non-ISDNs, no complete calling number may be available to the PSC and therefore
the full number of the calling user cannot be given to the called PS which has been provided with the

B-IF2.53-01-TS

7

CUIP supplementary service. In this case the PSC shall not send the Calling party number
information element.
On calls incoming from some non-ISDNs, the calling number may be delivered to the destination
PSC with an indication of Calling Line Identity Restriction. In this case the PSC shall behave
according to 1.5.2.3.1.
As a network option the originating network may restrict any address information identifying thecalling user from being forwarded to another network.
1.7.3 Procedures for interworking with private ISDNs
The procedures specified in 1.7.1 shall be used.
1.8 Signalling flows
The signalling flows are not included as they are an integral part of the basic call control procedures.
1.9 Parameter values (timers)
Not specific timers are required.
1.10 Dynamic description
See Figures 1-1-1, 1-1-2, 1-2-1 and 1-2-2.

8

B-IF2.53-01-TS

Null
0

SETUP

No

RELCOM(cause=#96)

CPN IE
provided by thecalling public CS?

OK

Yes

Verificationof the number?

Not OK

Complete thenumber set
SI=01
Null
0
CUIR
Service

Set type of number
and numbering
plan

RELCOM(cause=#100)

Null
0

Setup
indicationCallinitiated 1

NOTES
1.
This procedure operates independently from any CUIP subscription
by the calling PS and is provided as part of the basic service.
2.
The screening indicator encodings are:
SI=01
User provided verified andFigure 1-1-1/B-IF2.53
Originating PSC side dynamic description[public CS Type 1 in B-NW1.00]

B-IF2.53-01-TS

9

Null
0

SETUP

No

CPN IE
provided by thecalling public CS?

No
RELCOM(cause=#96)

Null
0

Null
0

Yes

Screening indicator
provided by thecalling public CS?

Yes

CUIR
Service

Set type of number,numbering plan andscreening indicator

Setup
indicationCallinitiated 1

NOTES
1.
This procedure operates independently from any CUIP subscription
by the calling PS and is provided as part of the basic service.

Figure 1-1-2/B-IF2.53
Originating PSC side dynamic description[public CS Type 2 in B-NW1.00]

10

B-IF2.53-01-TS

Null
0

Setup
requestPS
subscribedto CUIP?

No

Yes

No

Presentation
allowed?

No CPN IE is sent to No CPN IE is sent tothe called public CS the called public CS

Yes

CPN IEavailable?

No

Yes

Send CPN IE
as received

No CPN IE is sent tothe called public CS

Setup

Call
present
6

Figure 1-2-1/B-IF2.53
Destination PSC dynamic description[public CS Type 1 in B-NW1.00]

B-IF2.53-01-TS

11

Null
0

Setup
requestYes

CPN IEavailable?

Send CPN IE
as received

No

No CPN IE is sent
to the called public CS

SETUP

Call
present
6

Figure 1-2-2/B-IF2.53
Destination PSC side dynamic description[public CS Type 2 in B-NW1.00]

12

B-IF2.53-01-TS

2. Calling User Identification Restriction (CUIR)
2.1 Definition
Calling User Identification Restriction (CUIR) is a supplementary service offered to the calling party
to restrict presentation of the calling party’s PHS number and sub-address to the called party.
2.2 Description
2.2.1 General description
When CUIR is applicable and activated the originating PSC or public CS shall provide the destination
PSC with an indication that the calling user’s PHS number and sub-address (if provided by the callingPS) are not allowed to be presented to the called PS. In this case no calling user number and subaddress shall be included in the call offered to the called PS.
The presentation restriction function shall not influence the forwarding of the calling party number
within the PSC as part of the basic service procedures.
2.2.2 Specific terminology
For the purposes of this document, the following terms apply:
A served PS is the PS of a particular PHS number who has subscribed to the restriction of the callinguser identification information (on a permanent or on a per-call basis) in association with outgoingcalls. The served PS is also known as the calling PS.
A called PS is the receiver of a call, initiated by the served PS, on which CUIR has been activated.
A PHS number is a number conforming to the numbering plan and structure specified in ITU-T
Recommendation E.164.
CUIP
CUIR

Calling User Identification Presentation
Calling User Identification Restriction

2.2.3 Qualification on the applicability to telecommunication services
See B-SV2.00.
2.2.4 State definition
No specific states are required.
2.3 Operational requirements
2.3.1 Provision/withdrawal
See B-SV2.00.

B-IF2.53-01-TS

13

2.3.2 Requirements on the originating PSC side
All information pertaining to CUIR is inserted in the SETUP message sent as part of the basic callprocedures according to B-IF2.02 (Q.931).
2.3.3 Requirements in the public PHS ISDN part
This subclause is not applicable.
2.3.4 Requirements on the destination PSC side
See 2.5.2.4.
2.4 Coding requirements
The same as for 1.4.
2.5 Signalling requirements
2.5.1 Activation/deactivation/registration
Not applicable.
2.5.2 Invocation and operation
2.5.2.1 Actions at the originating public CS[public CS Type 1 in B-NW1.00]
If the calling public CS wishes to override the default setting in the PSC, the SETUP message sent by
the public CS shall contain the Calling party number information element with the presentation
indicator set appropriately.
[public CS Type 2 in B-NW1.00]
The SETUP message sent by the public CS shall contain the Calling party number information
element with the presentation indicator set appropriately.
If the calling PS has subscribed to the CUIR supplementary service permanent mode, the calling
public CS shall set the presentation indicator to “presentation restricted”.
If the calling PS has subscribed to the CUIR supplementary service on a per-call basis and requests tooverride the default setting, the calling public CS shall set the presentation indicator according to thatin the received Calling party number information element.
2.5.2.2 Actions at the originating local exchange

14

B-IF2.53-01-TS

2.5.2.2.1 Normal operation[public CS Type 1 in B-NW1.00]
If the calling PS has subscribed to the CUIR supplementary service permanent mode, the presentation
indicator received in the SETUP message will be ignored. The PSC shall set the presentation
indicator to “presentation restricted”.
If the calling PS has subscribed to the CUIR supplementary service on a per-call basis and requests tooverride the default setting, the originating PSC shall set the presentation indicator according to thatin the received Calling party number information element.
The presentation indicator shall be forwarded to the destination in association with the basic callrequest.
[public CS Type 2 in B-NW1.00]
If the PSC receives the SETUP message which does not include the presentation indicator from thecalling public CS, the PSC may set the presentation indicator to “presentation restricted”.
The presentation indicator shall be forwarded to the destination in association with the basic callrequest.
2.5.2.2.2 Exceptional procedures
Not applicable.
2.5.2.3 Actions at the transit exchangeThis subclause is not applicable.
2.5.2.4 Actions at the destination local exchange
2.5.2.4.1 Normal operation
The actions to be performed at the destination local exchange are provided as part of the CUIP
service, described in 1.5.2.3.1.
2.5.2.4.2 Exceptional procedures
Not applicable.
2.6 Interaction with other supplementary services
2.6.1 DTMF Transmission
No interaction.

B-IF2.53-01-TS

15

2.6.2 HandoverNo interaction.
2.6.3 User scrambling
No interaction.
2.6.4 Subaddress
No interaction
2.6.5 Calling User Identification Presentation (CUIP)
CUIR takes precedence over CUIP.
2.6.6 Calling User Identification Restriction (CUIR)
No interaction.
2.6.7 Call Forwarding
2.6.7.1 Call Forwarding Unconditional (CFU)
As specified in B-IF2.52.
2.6.7.2 Call Forwarding on PS Busy (CFB)As specified in B-IF2.52.
2.6.7.3 Call Forwarding on No Reply (CFNRy)
As specified in B-IF2.52.
2.6.7.4 Call Forwarding on PS Not Reachable (CFNRc)
As specified in B-IF2.52.
2.6.8 Call Barring
2.6.8.1 Barring of All Outgoing Calls (BAOC)
No interaction.
2.6.8.2 Barring of Outgoing International Calls (BOIC)
No interaction.

16

B-IF2.53-01-TS

2.6.8.3 Barring of Outgoing International Calls Except Call to Home Country (BOIC-exHC)
No interaction.
2.6.8.4 Barring of All Incoming Calls (BAIC)No interaction.
2.6.8.5 Barring of Incoming Calls on Roaming outside Home Country (BIC-roam)
No interaction.
2.6.9 Roaming
Further Study
2.6.10 PHS-UUS
2.6.10.1 Service 1
No interaction.
2.6.10.2 Service 2
No interaction.
2.6.10.3 Service 3
No interaction.
2.7 Interaction with other networks
2.7.1 Interaction with ISDNs
2.7.1.1 Actions at the originating local exchange in PHS
See 2.5.2.2.
2.7.1.2 Actions at the transit exchanges in ISDNThis subclause is not applicable.
2.7.1.3 Actions at the destination local ISDN exchange
See ITU-T Recommendation Q.951.
2.7.2 Interaction with non-ISDNs

B-IF2.53-01-TS

17

On calls to or via non-ISDNs, it cannot be assured that a restriction indication can be carried to thedestination network. As a national network option the originating PSC shall have the possibility torestrict any information identifying the calling party being forwarded to the destination network when
CUIR is applicable. If a destination network receives a calling party number without any indication ofpresentation allowed or restricted, the destination network (the host network) will act according to its
rules and regulations. For further information see 3.7 in ITU-T Recommendation Q.951.
2.7.3 Procedures for interworking with private ISDNs
The procedures specified in 2.7.1 shall be used.
2.8 Signalling flows
The signalling flows are not included as they form an integral part of the basic call control
procedures.
2.9 Parameter values (timers)
No specific timers are required.
2.10 Dynamic description
See Figures 2-1-1 and 2-1-2.

18

B-IF2.53-01-TS

CUIR
serviceNo

Calling
PS subscribedto CUIR?

Permanent

Yes

Subscription
optionNo

PI = 00 set by
the PHS network

PI = 01 set by
the PHS network

Temporary

PI includedin the CPN IE?

PI = default
value

Yes

PI as received
from the calling
public CS

PI = 00 “presentation allowed”
PI = 01 “presentation restricted”

Figure 2-1-1/B-IF2.53
Originating PSC side dynamic description[public CS Type 1 in B-NW1.00]

B-IF2.53-01-TS

19

CUIR
serviceNo

PI includedin the CPN IE?

PI = 01 set by
the PSCYes

PI as received
from the calling
public CS

PI = 01 “presentation restricted”

Figure 2-1-2/B-IF2.53
Originating PSC side dynamic description[public CS Type 2 in B-NW1.00]

20

B-IF2.53-01-TS