FCD-E1, FCD-T1
E1/T1 or Fractional E1/T1 Access UnitsDESCRIPTION• FCD-E1 and FCD-T1 are accessFEATURES• E1/T1 or Fractional E1/T1access units• Support one or two data
ports with selectable sync
data rates: n x 56/64 kbps
• Optional sub-E1/T1 drop &insert port for PBX
connectivity• Fail-safe sub-E1/T1 linkensuring uninterrupted
service (G.703 only)• Serial data interfaces: V.35,
RS-530, V.36/RS-449 orX.21• Optional high performance

built-in Ethernet bridge, withor without VLAN support• SNMP internal agent• Management:
Out-of-band via V.24
supervisory port
Inband via TS0 or
dedicated timeslot• Dial-in option for remote
out-of-band management• Dial-out for alarm report• E1 interface complies with:ITU G.703, G.704, G.706,G.732, G.823• T1 interface complies with:
AT&T TR62411, TR62421,
ANSI T1.403 andAT&T 54016 (local support)• The E1/T1 main link can besupplied with the following
options:
Copper interface withbuilt-in software-selectable
LTU for E1 and CSU for T1
Fiber optic interface• Enhanced diagnostics
include:User activated local andremote loopbacks
Integrated BER tester
Fractional E1/T1 inbandloop• Store 24 hours of E1/T1
network performancemonitoring and last
100 alarms• Relay activation upon alarmevent• Alarm mask configurable forany alarm

units for E1/T1 or Fractional E1/T1
services. They can be used as rateand interface converters or as
integrating multiplexers for E1/T1
and Fractional E1/T1 services(see Figure 2).
• FCD-E1 and FCD-T1 also operate
opposite RAD's modular DXC(DACS) products or other vendors'
E1/T1 equipment, to support
multilink star applications, such asaccess to SDH networks. The DXC
and the FCD units are managed bya centralized SNMP network
management system (see Figure 3).
• FCD-E1 and FCD-T1 can beordered with either a copper
E1/T1 or a fiber optic link. Bothconfigurations are available with
an optional sub-E1/T1 drop &insert port. The units can beordered with either one or twouser data ports. The second port
can be an Ethernet bridge port,with or without VLAN support.
BASIC UNIT

• The basic unit includes power

supply, electrical/copper E1/T1
link with integral LTU/CSU andone data port.
• The E1 interface is compatible
with virtually all carrier-provided
E1 services and meets ITU
recommendations G.703, G.704,G.706 and G.732. It supports
either 2 or 16 frames per
multiframe, with or without
CRC-4. Line coding is HDB3. The
user-selectable integral LTU
ensures a range of up to 2 km.

• The T1 interface is compatible

with virtually all carrier provided
T1 services, including ASDS fromAT&T and complies withTR-62421. The T1 interface
supports D4 and ESF framingformats. Zero suppression over

FCD-E1, FCD-T1
E1/T1 or Fractional E1/T1 Access Units
the line is selectable for eithertransparent, B7ZS or B8ZS. The
user-selectable integral CSU
ensures a range of up to 1.3 mile.
• FCD-E1 and FCD-T1 can beordered with a fiber optic link,eliminating the need for an
external fiber optic modem. The
fiber optic link provides a securelink in hazardous or hostileenvironments. It complies with
ITU standards G.921 and G.956.

of E1 equipment not supporting
CRC-4, over an E1 network that isworking with CRC-4.

1550 nm laser diode for use
over single mode fiber for
extended range up to 100 km(62 miles).

• The optional sub-T1 port can be• Timeslot assignment isprogrammable, allowing data fromeach data port and from the
sub-E1/T1 port to be placed
automatically into consecutivetimeslots. Alternatively, timeslots
can be allocated manually, at user
discretion.

• Three fiber optic interfaces are• Multiple clock source selection

available:
850 nm LED for use overmultimode fiber at distances up
to 5 km (3 miles)
1310 nm laser diode for useover single mode fiber at
distances up to 62 km (38 miles)•ensures maximum flexibility forsupporting different applications.
The E1/T1 main link may betimed from the recovered receive
clock signal, from an internal
oscillator, from one of the data
ports, or from the sub-E1/T1 port.
The optional sub-E1 port can be
configured to work without CRC-4,
while the E1 main link is working
with CRC-4. This enables connection

configured with D4 or ESF framing,
while the T1 main link framing isESF. This enables connection ofT1 D4 equipment over a T1network.
• Bypassing the sub-E1/T1 port tothe main link (not applicable withthe fiber optic link) ensuresuninterrupted service to thesub-E1/T1 port, providing fullimmunity to hardware and powerfailure.
• FCD-E1 and FCD-T1 are compact
standalone units. A rack mountadapter kit enables installation of
one or two (side by side) units in a19" rack.

Remote Sites

APPLICATIONS

E1/T1

FCD-E1or FCD-T1

Headquarters

Ethernet
LANPBX

Copper
E1/T1

RADring
Fiber

RS-530Ethernet
LANManagementStation

E1/T1s

FCD-E1or FCD-T1

E1/T1NetworkEthernet
LANPBX

DXC-30Fractional E1/T1

E1/T1

PBX

FCD-E1or FCD-T1

E1/T1

Ethernet
LANPBX

FCD-E1or FCD-T1

Ethernet
LANPBX

Figure 1. Extended Ethernet Management over E1/T1 Network

USER INTERFACE• The following user data portinterfaces can be ordered: V.35,
RS-530, V.36/RS-449 or X.21. The
ports can operate in the following
clock modes:
DCE: transmit and receive
clocks are output (option tosample the incoming data withan inverted clock)DTE1: external transmit clock isinput (coming from the user DTE)
DTE2: both transmit and receive
clocks are externally input.

• When equipped with optional

IR-ETH or IR-ETH/Q Ethernet
bridge modules, FCD-E1 andFCD-T1 can transparently connect
remote LANs, as well as VLANs,
over unframed E1/T1 links,
utilizing the full E1/T1 bandwidth.
It filters Ethernet frames,
forwarding only the frames
destined to the WAN.

• The Ethernet ports are available

with Ethernet 10BaseT (UTP) or10Base2 (BNC) interfaces. The
Ethernet port with 10BaseT
operates in full duplex mode,
while the one with 10Base2
operates in half duplex.

• When operating with CRC-4, E1

MANAGEMENT & MAINTENANCE• Setup, control and monitoring ofstatus and diagnostics
information can be activated via:
ASCII terminal connected to the
SLIP control port
SNMP management connected
through either SLIP control port
or inband management
Telnet session performed
through either SLIP control port
or inband management
Menu-driven management using
front panel LCD with three
push-buttons.

•network statistics are stored inmemory, according to RFC-1406.
The statistic information may beretrieved locally through thecontrol port.
When operating in the ESFformat, T1 network statistics are
stored in memory, according toANSI and AT&T standards. The
statistical information may be
retrieved by the service provider(ANSI only) or locally through thecontrol port.

• Maintenance capabilities include

user activated local and remoteloopbacks at the E1/T1 main link,
sub-E1/T1 and data ports. The
user can activate a BER test foreach data or sub-E1/T1 port
individually. Each data or
sub-E1/T1 port responds to an
ANSI FT1 RDL (T1E1.2/93-003)
inband loop code, generated bythe remote FCD-E1, FCD-T1 or
DXC in a specific bundle oftimeslots allocated only to thatport.

• FCD-E1 and FCD-T1 have aninternal SNMP agent and can becontrolled by any generic SNMP
station or by the RADview SNMP
network management application.

• FCD-E1 and FCD-T1 support bothdial-in and dial-out modem
connections via the serial
V.24/RS-232 port by using SLIP
protocol or ASCII terminal
command line interpreter. These
connections can be used forremote out-of-band configurationand monitoring, as well as forsending callout alarm messages.

• Inband management can be

performed by using the spare bits(Sa bits) on timeslot 0 or through a
dedicated Timeslot that supports
proprietary protocol and Frame
Relay RFC 1490. This allows
setup, monitoring and diagnosticsof the remote unit. Inband accessby using spare bits on Timeslot 0is possible only if those bits are
passed transparently end-to-end.

n x 64 kbps
E1/T1 orFractional E1/T1

Bridge/Router

NetworkFCD-E1
or FCD-T1

Fractional E1/T1

PBX

Figure 2. Connection of LAN Traffic together with PBX Traffic to E1/T1 NetworkFCD-E1, FCD-T1
E1/T1 or Fractional E1/T1 Access Units
SPECIFICATIONS• Line Impedance

E1/T1 MAIN LINK AND SUBLINK• E1 Framing

256N (no MF, CCS)
256N (no MF, CCS) with CRC-4
256S (TS16 MF, CAS)
256S (TS16 MF CAS) with CRC-4
Unframed (main link only)E1: 120Ω, balanced or 75Ω,
unbalanced
T1: 100Ω, balanced• Connectors
E1: RJ-45, 8-pin, balanced or two
BNC coaxial, unbalanced
T1: RJ-45, 8-pin, balanced• Main Link Timing

Internal accuracy: ±30 ppm
Loopback timing: ±130 ppm
Sub-E1: 2.048 Mbps ±130 ppm
Sub-T1: 1.544 Mbps ±130 ppm
External timing from data port:n x 56, n x 64 ±130 ppm• T1 Framing

D4
ESF
Unframed (main link only)• Bit Rate

E1: 2.048 Mbps
T1: 1.544 Mbps

DATA PORTS• Number of Data Ports

One or two (see Ordering)• Interface

RS-530, V.35, X.21, V.36/RS-449• Connectors

D-type 25-pin, female RS-530
pinout• Data Raten x 56 or n x 64 kbps,(n=1,2...,31)• Clock Modes

DCE:RX and TX clock to DTE
DTE1:RX clock to user device;
TX clock from user device
DTE2:RX and TX from DCE• Sublink Timing

Locked on the main link

• Line Code• Compliance

E1: HDB3
T1: AMI

E1: ITU G.703, G.704, G.706,G.732
T1: AT&T TR-62411,
ANSI T1.403• T1 Zero Suppression

Transparent, B7ZS, B8ZS

• E1 Signal Level

Receive:
0 to -10 dB without LTU
0 to -36 dB with LTU (main linkonly)
Transmit:±3V (±10%), balanced±2.37V (±10%), unbalanced• T1 Signal Level

Receive:
0 to -10 dB without CSU
0 to -36 dB with CSU (main linkonly)Transmit:
0, -7.5, -15, -22.5 dB with CSU±3V,±10% soft adjustable at
0 to 655 ft without CSU• Control Signals

CTS follows RTS or constantly
ON, soft-selectable
DSR constantly ON, unless intest mode
DCD constantly ON, unless in
LOC SYNC LOSS

• E1 Jitter Performance

As per ITU G.823, ETSI TBR-12
and TBR-13• T1 Jitter Performance

ETHERNET BRIDGE PORTS• LAN Table

As per AT&T TR-62411

IR/ETH: 10,000 addresses
IR/ETH/Q: 2,000 addresses• Filtering and Forwarding

FIBER OPTIC LINK

IR/ETH: 15,000 pps
IR/ETH/Q: 2,000 pps• ComplianceG.921, G.956• Operating Characteristics• Buffer• Connectors• Delay (IR/ETH only)

See Table 1.

ST, FC/PC or SC (see Ordering)

256 frames
1 frame• Line CodeManchester

Table 1. Fiber Optic Interface Characteristics
Wavelength

Fiber Type

[nm]

[µm]

850

62.5/125
multimode

1310
1550

Transmitter
Type

Typical Power
Receiver
Coupled into Fiber Sensitivity

Typical Optical Typical Maximum
BudgetRange

[dBm]

[dBm]

[dB]

[km]

LED

-18-38

185

3

9/125
single mode

Laser

-12-39

25

6238

9/125
single mode

Laser

-12-392510062[mi]FCD-E1, FCD-T1
E1/T1 or Fractional E1/T1 Access Units• Timeslot Allocation• WAN Protocol• Management Ports

Consecutive (bundled)
Alternate
User defined

HDLC

Note: IR-ETH and IR-ETH/Q interface
modules conform to the IEEE
802.3/Ethernet V2 standard.
Additionally, IR-ETH/Q supports theIEEE 802.1/Q frames.

Interface and Connector:
V.24/RS-232, 9-pin D-type,femaleFormat: asynchronous
Baud rate:
DCE: 0.3 to 19.2 kbps,
autobaud
DTE: 0.3 to 9.6 kbps
Character: 8 bit no parity, 7 bit
odd or even parity• Diagnostics• Connectors

10BaseT (UTP): Shielded RJ-45
10Base2 (Coax): BNC

GENERAL• Performance Monitoring

E1 Main Link
Local support of CRC-4
Full statistical diagnostics
according to RFC-1406
T1 Main Link
Local support of ESF diagnostics
according to AT&T PUB 54016
Full statistical diagnostics
according to ANSI T1.403-198

Main E1/T1 link:
Local and remote loopback
Sub-E1/T1 port:
Local and remote loopback
Sub-E1/T1 port BER test
Data port:
Local loopback
Remote loopback
Data port BER test
Inband code activated loopback
per data port
T1 network loopback,code-activated (FCD-T1 only)• Front Panel Control

LCD:
2 rows of 16 characters
Push-buttons:
Cursor, Scroll, Entern x 64 kpbs

RouterFiber or Copper

E1/T1

Ethernet
LAN

FCD-E1or FCD-T1

n x 64 kpbs

SNMP Management
Station
E1/T1
SDHRingn x 64 kpbs

Copper

E1/T1
E1/T1

Server

DXC-30 (DACs)
Supports up to
120 E1/T1 links

E1/T1
Ethernet
LAN

FCD-E1or FCD-T1
PBX

n x 64 kpbs

RouterCopperE1/T1
FCD-E1or FCD-T1

Ethernet
LANFractional
E1/T1

PBXFigure 3. SDH/SONET Access Solution for Multiple Remote Sites

FCD-E1, FCD-T1
E1/T1 or Fractional E1/T1 Access Units• Indicators

•••

••

ORDERING

CABLES

General: PWR (green), TST (yellow),
ALM (red)
FCD-E1/*/~/&/%/#+
Main E1 and Sub-E1: LOC SYNC
E1 or Fractional E1 Access Unit
LOSS (red), REM SYNC LOSSFCD-T1/*/~/&/%/#+(red)Main T1 and Sub-T1: RED ALARM T1 or Fractional T1 Access Unit(red), YEL ALARM (yellow)* Specify S1 for optional drop&insert
Alarmscopper E1/T1 sublink
Last 100 alarms are stored andavailable for retrieval. Each alarm is ~ Specify power supply voltage:
AC for 100 to 240 VAC
time stamped.
48 for -48 VDC
Alarm Relay
3 relay contacts are available on the & Specify data port interface:
CONTROL DTE connector. The
530 for RS-530
alarm relay is activated by each
V35 for V.35
alarm in the alarm buffer (userX21 for X.21
defined).
V36 for V.36/RS-449
PhysicalHeight: 4.3 cm / 1.7 in% Specify optional second data port
Width: 21.5 cm / 8.5 ininterface:
Depth: 24.3 cm / 9.5 in530 for RS-530
Weight 1.3 kg / 2.9 lb
V35 for V.35
PowerX21 for X.21
100–240 VAC; 47–63 Hz
V36 for V.36/RS-449-48 VDC, nominal (40–57 VDC)ETUB for UTP (10BaseT) Ethernet
Power consumption: 6W
bridgeEnvironment
ETBB for BNC (10Base2) Ethernet
Temperature: 0–50°C / 32–122°F
bridgeHumidity:
up to 90%,
ETUQ for UTP (10BaseT) Ethernet
non condensing
bridge with VLAN support
ETBQ for BNC (10Base2) Ethernet
bridge with VLAN support

The following cables convert theFCD-E1’s or FCD-T1’s 25-pin data port
connector into the respective interface.
Cable length is 2m (6 ft), unlessotherwise indicated.
CBL-HS2/*/#
Adapter cables for DB-25 channelconnectors* Specify interface, clock mode:
V/1 for 34-pin V.35, DCE
V/2 for 34-pin V.35, DTE1
V/3 for 34-pin V.35, DTE2
R/1 for 37-pin V.36/RS-449, DCE
R/2 for 37-pin V.36/RS-449, DTE1
R/3 for 37-pin V.36/RS-449, DTE2
X/1 for 15-pin X.21, DCE# Specify cable connector type:
F for female
M for maleNote: By default, cables for DCE clock mode
operation are supplied for each data port
according to interface option specified.
Cables for DTE1 and DTE2 mode operationmust be ordered separately.

# Specify link connector type:
ST for ST type fiber connectors
FC for FC/PC type fiber connectors
SC for SC type fiber connectors(Default is G.703 electrical/copperinterface)data communications
www.rad.com+ Specify optical interface wavelengthand transmitter type (not relevantwith copper interface):
85 for 850 nm, multimode13L for 1310 nm, single mode, laser
15L for 1550 nm, single mode, laser

International Headquarters
24 Raoul Wallenberg Street
Tel Aviv 69719, Israel
Tel: (972) 3-6458181
Fax: (972) 3-6498250, 6474436
Email: rad@rad.com

U.S. Headquarters
900 Corporate DriveMahwah, NJ 07430
Tel: (201) 529-1100
Toll free: 1-800-444-7234
Fax: (201) 529-5777
Email: market@radusa.com

172-100-07/03

 1991–2003 RAD Data Communications Ltd.
All other trademarks are the property of their respective holders.

Specifications are subject to change without prior notice.