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FCD-E1LC, FCD-T1LC
Managed E1/T1 or Fractional E1/T1 Access UnitsManaged TDM
multiplexers foraccess to full or
fractional E1/T1services• Managed access units for E1/T1 or fractional E1/T1 service• E1/T1 main link and sublink support framed and unframed signals• One or two data ports with selectable sync data rates: n × 56 kbps or n × 64 bps• Serial data port interfaces: V.24, V.35, V.36/RS-449, RS-530, or X.21
• Optional sub-E1/T1 drop-and-insert port for PBX connectivity• Optional Ethernet 10/100BaseT bridge with VLAN support, or V.24 serial interface(second user port)

FCD-E1LC and FCD-T1LC are managed
access units that convert rates andinterfaces for full or fractional E1/T1
services.
These units support a single or dual serialn × 56 kbps or n × 64 kbps data userinterface. The second serial data interface
port can be replaced by an Ethernet LANinterface to allow LAN-to-LAN connectivity
over TDM media.

The FCD-E1LC and FCD-T1LC unitsinterconnect with RAD modular DXC,
Megaplex products and E1/T1 equipmentfrom other vendors to support multilink
star applications such as access to SDHnetworks. All these products — DXC, FCD,
and Megaplex — operate together undercentralized SNMP network management.

The Access Company

FCD-E1LC, FCD-T1LC
Managed E1/T1 or Fractional E1/T1 Access Units

The E1 interface is compatible with
virtually all carrier-provided E1 services
and meets ITU recommendations G.703,G.704, G.706, G.732, G.823, and G.826.
It supports both 2 and 16 frames per
multiframe, with or without CRC-4.
The E1 interface also accepts a 2048 kbpsdata stream and converts it to an ITU-T
Rec. G.703 unframed signal for transport
over the E1 main link and sublink. Linecode is HDB3. The integral LTU ensures arange of up to 2 km (1.2 miles) and issoftware-selectable.
The T1 interface is compatible with
virtually all carrier-provided T1 services,
including ASDS from AT&T. It complies
with TR-62411 and TR-62421 andsupports D4 and ESF framing formats.
Zero suppression over the line issoftware-selectable for either transparent,
B7ZS or B8ZS. The software-selectable
integral CSU ensures a range of up to2.1 km (1.3 miles).
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 of E1 equipment
not supporting CRC-4, over an E1 networkthat is working with CRC-4.

The optional sub-T1 port can be
configured with D4 or ESF framing, while
the T1 main link framing is ESF. Thisenables connection of T1 D4 equipment
over an ESF T1 network.
The FCD-E1LC and FCD-T1LC units can be
programmed to assign data automaticallyfrom each data port into consecutivetimeslots. The user can also assign
timeslots manually.
Timing for the E1/T1 main link and sublink
may come from the recovered receive
clock, an internal oscillator, or one of thedata ports. This multiple clock source
selection ensures maximum flexibility forsupporting different applications.
Front panel LEDs indicate alarms, E1/T1
signal loss, and diagnostic loopback
operation. Rear panel LEDs on the
Ethernet interface modules indicate LAN
status and activity.
FCD-E1LC and FCD-T1LC are compact
standalone units. A rack mount adapter kit
enables installation of one or two (sideby-side) units in a 19-inch rack.

USER INTERFACESMANAGEMENT & MAINTENANCE

The FCD-E1LC and FCD-T1LC units feature
the following user interfaces:

Status and diagnostic information isdefined, configured, and monitored using
one of the following methods:•Serial data interfaces: V.24, V.35,
V.36/RS-449, RS-530, X.21•

Ethernet 10/100BaseT LAN interface
module with a built-in bridge(IR-ETH/QN).

The synchronous data ports of FCD-E1LC
operate in the following clock modes:•DCE: The FCD units provide bothtransmit and receive clocks to the userequipment, with optional sampling of
the incoming data with an invertedclock•

DTE1: The FCD units provide thetransmit clock, while the transmit clockis provided by the attached userequipment•DTE2: The attached user equipment
provides both transmit and receiveclocks.

The IR-ETH/QN interface module has a
10/100BaseT interface that supports VLAN
frames, autonegotiation, fault
propagation, and automatic learning andaging. The module transparently connects
FCD-E1LC and FCD-T1LC to remote LANs
over E1/T1 links. It filters Ethernet frames
and forwards only frames that aredestined for the WAN.

•ASCII terminal connected to the async
control port•

SNMP management•Telnet.

All models support an internal SNMP agent
that is managed by any generic SNMP
station or by the RADview SNMP-based
management application.
FCD-E1LC and FCD-T1LC support bothdial-in and dial-out modem connections
through the serial RS-232 port, by using
SLIP or PPP protocol or a command line
interpreter on an ASCII terminal. These
out-of-band connections can be used forremote configuration and monitoring, as
well as for sending callout alarm
messages.
Up to 100 time-stamped alarms areavailable for retrieval through thesupervision terminal, a Telnet host, or aRADview management station.

Inband management can be performed
either by dedicated timeslot using
standard Frame Relay protocol(RFC 1490), or by using the spare Sa bits
on timeslot 0 for FCD-E1LC or FDL bits for
FCD-T1LC. This allows the user to setup,monitor, and run diagnostics on theremote unit. The spare bits on TS0 or FDL
that are used for inband access must be
passed transparently end-to-end.
Maintenance capabilities includeuser-activated local and remote loopbacks
on the E1/T1 main link, sublink, and dataports. The user can activate a BER test on
the main link. Also, the main link responds
to an ANSI FT1 RDL (T1.403) inband loop
code, or a user-configured patterngenerated by a remote FCD-E1LC,
FCD-T1LC, or DXC in a specific bundle oftimeslots allocated only to that port. Theuser can also define BER or inband tests
to run on any timeslot of the main link.
E1 network statistics are stored inmemory, according to RFC 1406.
Statistical information can be retrieved
locally through the control port.
T1 network statistics are stored inmemory, according to ANSI and AT&Tstandards. The statistical information may
be retrieved by the service provider (ANSIonly) or locally through the control port.

FCD-E1LC, FCD-T1LC
Managed E1/T1 or Fractional E1/T1 Access Units

Figure 1. Extended Ethernet Management over E1/T1 Network

Specifications
E1 MAIN LINK AND SUBLINK
Framing
256N (no MF, CCS)
256N (no MF, CCS) with CRC-4
256S (TS16 MF, CAS)
256S (TS16 MF, CAS) with CRC-4
Unframed
Bit Rate
2.048 Mbps
Line CodeAMI
Zero Suppression
HDB3
Line Impedance
120Ω, balanced75Ω, unbalanced
Transmit Timing
Locked to the system clock
Signal Level
Receive:
0 to –10 dB without LTU
0 to –36 dB with LTU
Transmit:±3V (±10%), balanced±2.37V (±10%), unbalanced
Jitter Performance
As per ITU G.823, ETSI TBR-12 and TBR-13
Connectors
RJ-45, 8-pin, balanced
Two BNC coaxial, unbalanced, using
adapter cableCompliance
ITU G.703, G.704, G.706, G.732, G.823,G.826
Performance Monitoring
Local support of CRC-4Full statistical diagnostics according toRFC-1406
T1 MAIN LINK AND SUBLINK
Framing
D4ESF
Unframed (main link only)
Bit Rate
1.544 Mbps
Line CodeAMI
Zero Suppression
Transparent, B7ZS, B8ZS
Line Impedance
100Ω, balanced
Transmit Timing
Locked to the system clock
Signal Level
Receive:
0 to –10 dB without CSU
0 to –36 dB with CSU
Transmit:–7.5, –15, –22.5 dB with CSU±3V, ±10% soft adjustable at 0 to 655
ft without CSU
T1 Jitter Performance
As per AT&T TR-62411

Connector
RJ-45, 8-pin, balanced
Compliance
AT&T TR-62411, AT&T 54016, AT&T
TR-62421, ANSI T1.403
Performance Monitoring
Local support of ESF diagnostics according
to AT&T PUB 54016
Full statistical diagnostics according toANSI T1.403-198
DATA PORTSConnectors
D-type, 25-pin, RS-530, female(converted via adapter cables to V.35,X.21, V.36/RS-449)
Additional connectors for second user
port: D-type, 25-pin, female for V.24,
RJ-45 for ETH
Data Raten × 56/64 kbps (n=1 to 24) for T1
n × 64 kbps (n=1 to 31) for E1
n × 64 kbps (n=1 to 2) for V.24 port
Clock Modes
DCE: Rx and Tx clock to user device
DTE1: Rx clock to user device;
Tx clock from user device (not for X.21and V.24)
DTE2: Rx and Tx clock from user device(not for X.21 and V.24)
Control Signals
CTS follows RTS or constantly ON, softselectable
DSR constantly ON, unless in test mode
DCD constantly ON, unless in sync loss

Data SheetETHERNET BRIDGE PORTDIAGNOSTICS

GENERAL

Interface and Connector
10/100BaseT (UTP) with shielded RJ-45

Main E1/T1 link
Local loopback
Remote loopback
BER test

System ClockInternal clock: ±50 ppm
Loopback timing: ±130 ppm
External timing from data port: ±130 ppm

Code-activated inband loopback per dataport
Code-activated T1 network loopback(FCD-T1LC only)

Management PortInterface: RS-232, 9-pin D-type, female
Format: asynchronous
Baud rate: 1.2–115.2 kbps, autobaud
Character: 8-bit no parity, 7-bit odd oreven parity

Maximum Frame Length
1536 bytes
LAN Table
2048 MAC addresses
Throughput
4,000 pps

Buffer120 frames

SublinkLocal loopback
Remote loopback
Code-activated T1 network loopback(FCD-T1LC only)Line Code10BaseT: Manchester
100BaseT: MLT3

Data Port
Local loopback
Remote loopback

Latency
300 μsec (64-byte frame size, 2M LAN rate)

WAN Protocol
HDLC

Timeslot Allocation
Consecutive (bundled)
User-defined
Indicators
General: PWR (green), TST (yellow), ALM(red)Main/sub-E1: LOC SYNC LOSS (red), REM
SYNC LOSS (red)Main/sub-T1: RED ALARM (red), YEL
ALARM (yellow)
PhysicalHeight: 4.4 cm (1.7 in)
Width: 21.7 cm (8.5 in)
Depth: 17.0 cm (6.7 in)
Weight: 0.8 kg (1.8 lb)
PowerAC/DC: 100 to 240 VAC, -48 to -60 VDC,nominal
Power consumption: 5W max.
Environment
Temperature: 0°C to 50°C (32°F to 122°F)
Humidity: Up to 90%, non–condensing

FCD-E1LC, FCD-T1LC
Managed E1/T1 or Fractional E1/T1 Access Units

Table 1. FCD Comparison TableFeatures

Total user ports
Interface types

E1/T1 line type
LCD panel
Auto-configuration
SNMP management
Interoperability
ETH out-of-band
for management
E1 bypass
ETH performance

FCD-E1FCD-E1L

32
RS-530, V.35,
RS-530, V.35, V.36,V.36, X.21, Sub-E1X.21, Ethernet
bridge(10/100BaseT with
VLAN support)
CopperCopper–9–
9

FCD-E1LC/T1LC

FCD-E1E

FCD-E1A

323RS-530, V.35,
RS-530, V.35,
RS-530, V.24, V.35,V.36, X.21, Ethernet
V.36/RS-449, X.21,
V.36/RS-449, X.21,Bridge (10/100BaseTSub-E1
V.24/RS-232, Ethernetwith VLAN support), Bridge (10/100BaseT with
Sub-E1/T1
VLAN support), Sub-E1
CopperCopperCopper–99–––

9Megaplex, DXC

9Megaplex, DXC

9Megaplex, DXC

9Megaplex, DXC

9Megaplex, DXC

999999–––9VLAN priority tagging(802.1p/Q)

9VLAN transparent

VLAN transparent

VLAN transparent

Data Sheet
FCD-E1LC, FCD-T1LC
Managed E1/T1 or Fractional E1/T1 Access Units

SUPPLIED ACCESSORIESSTANDARD CONFIGURATIONS

The following cables are supplied for eachdata port interface specified for operatingin DCE clock mode:
CBL-HS2/V/1 for 34-pin V.35
CBL-HS2/R/1 for 37-pin V.36/RS-449
CBL-HS2/X/1 for 15-pin X.21

389-100-06/11 (1.0) Specifications are subject to change without prior notice. © 1991–2011 RAD Data Communications Ltd. The RAD name, logo, logotype, and the terms EtherAccess, TDMoIP and TDMoIP Driven,and the product names Optimux and IPmux, are registered trademarks of RAD Data Communications Ltd. All other trademarks are the property of their respective holders.

Ordering

Power cord and AC/DC adaptor plug

FCD-E1LC/X21/ETQN
FCD-E1LC/X21/S/ETQN
FCD-E1LC/V35/S/ETQN
FCD-E1LC/X21
FCD-E1LC/V35
FCD-T1LC/X21/S

OPTIONAL ACCESSORIESFCD-T1LC/530/530

RM-33-2
Hardware for mounting one or two units
in a 19-inch rack

FCD-T1LC/V35/ETQN
FCD-T1LC/530FCD-T1LC/V35

CBL-DB9F-DB9M-STR
Control port cable

SPECIAL CONFIGURATIONSFCD-E1LC/&/*/%
E1 or fractional E1 access unit

CBL-RJ45/2BNC/E1/X
RJ-45 to BNC adaptor cable(for unbalanced main link interface)

FCD-T1LC/&/*/%
T1 or fractional T1 access unit

CBL-RJ45/2BNC/E1
RJ-45 to BNC adaptor cable(for unbalanced sublink interface)

Legend& Data port interface:
530 RS-530
V35 V.35
X21 X.21
V36 V.36/RS-449*S

Optional drop-and-insert E1/T1sublink% Optional second data port interface:
530 RS-530
V35 V.35
X21 X.21
V36 V.36/RS-449
V24 for V.24
ETQN 10/100BaseT Ethernet bridgewith VLAN support

International Headquarters
24 Raoul Wallenberg Street
Tel Aviv 69719, Israel
Tel. 972-3-6458181
Fax 972-3-6498250, 6474436
E-mail market@rad.com

www.rad.com

CBL-HS2/*/#
Adaptor cables for DB-25 channel
connectors, for operation in the DTE1 andDTE2 clock modes

Legend*#Interface, clock mode:
V/2 34-pin V.35, DTE1
V/3 34-pin V.35, DTE2
R/2 37-pin V.36/RS-449, DTE1
R/3 37-pin V.36/RS-449, DTE2Cable connector typeFfemale
Mmale

North America Headquarters
900 Corporate Drive
Mahwah, NJ 07430, USA
Tel. 201-5291100
Toll free 1-800-4447234
Fax 201-5295777
E-mail market@radusa.com

Order this publication by Catalog No. 803532

The Access Company