FCD-E1L, FCD-T1L
E1/T1 or Fractional E1/T1 Managed Access
Units• FCD-E1L and FCD-T1L also operate
opposite RAD's modular DXC(DACS) products, as well as othervendors' E1/T1 equipment, tosupport multilink star applications,such as access to SDH networks.
The DXC and the FCD units
operate together with a centralized
SNMP network management.

• The E1 interface is compatible withFEATURES• Managed access units forE1/T1 or Fractional E1/T1• E1/T1 main link interfaces
support both framed andunframed signals• Provide one or two dataports with selectable sync
data rates of n x 64 kbps
• Serial data port interfaces:
V.35, RS-530, V.36/RS-449,
V.24 or X.21
• Optional Ethernet or Fast
Ethernet bridge (with orwithout VLAN support) or IProuter• Autoconfiguration function

for plug-and-play operability• SNMP agent• Management:
Out-of-band via V.24
supervisory port
Inband via TS0 or
dedicated timeslot overFrame Relay• Dial-in option for remote
out-of-band management• Dial-out for alarm report• Enhanced diagnostics

include:User activated local andremote loopbacks
Integrated BER tester
Fractional E1/T1 inbandloop• Stores 24 hours of E1
network performancemonitoring and last
100 alarms• Alarm mask configurable forany alarm

DESCRIPTION• FCD-E1L and FCD-T1L aremanaged access units, which can beused as rate and interface
converters for E1/T1 and Fractional
E1/T1 services.

• FCD-E1L and FCD-T1L support asingle or dual serial n x 64 kbps data
user interface. Instead of serial datainterface port, an Ethernet LANinterface can be ordered, allowing
LAN-to-LAN connectivity over TDM
media.

virtually all carrier-provided E1services 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. It
can also accept a 2048 kbps data
stream and convert it to an ITU-T
Rec. G.703 unframed signal fortransport over the E1 main link. Linecode is HDB3. The integral LTU
ensures a range of up to2 km/1.2 miles and is soft-selectable.

• The T1 interface is compatible with

virtually all carrier provided T1
services, including ASDS from AT&Tand complies withTR-62421. The T1 interface supports
D4 and ESF framing formats. Zerosuppression over the line is selectablefor either transparent, B7ZS or B8ZS.
The user-selectable integral CSU
ensures a range of up to 1.3 mile.

• Timeslot assignment is

programmable, allowing data fromeach data port to be placed
automatically into consecutive
timeslots. Alternatively, timeslots
can be assigned manually at user
discretion.

• FCD-E1L and FCD-T1L feature

autoconfiguration for plug-and-playconnectivity. Upon connection tothe E1/T1 link, the units detect theE1/T1 parameters and performautoconfiguration accordingly. ThisE1/T1 learning process can be
activated via either a push-buttonon the FCD-E1L/FCD-T1L front
panel or a terminal command. The
state of the learning process isFCD-E1L, FCD-T1L
E1/T1 or Fractional E1/T1 Managed Access Units
monitored by a dedicated LED
indicator and/or supervision
terminal messages.

• Multiple clock source selection

ensures maximum flexibility forsupporting different applications.
The E1/T1 main link may be timed
from the recovered receive clock,from an internal oscillator, or fromone of the data ports.

• FCD-E1L and FCD-T1L feature

front panel LEDs to indicate alarms,
E1/T1 signal loss condition anddiagnostic loopback operation. The
rear panel LEDs of the Ethernet
interface modules indicate the LANstatus and activity.

• FCD-E1L and FCD-T1L areavailable as standalone units. A rack
mount adapter kit enables
installation of one or two (side byside) standalone units in a 19" rack(see Ordering).

USER INTERFACES• FCD-E1L and FCD-T1L support thefollowing types of user interfaces:
Serial data interfaces: RS-530,
V.35, X.21, V.24, V.36/RS-449
Ethernet LAN interface modules
with a built-in bridge (IR-ETH,IR-ETH/Q, IR-ETH/QN) or an IP
router (IR-IP).

• The synchronous data ports canoperate in the following clock
modes:
DCE: FCD-E1L/FCD-T1L
provides both transmit andreceive clocks to the user
equipment, with optional
sampling of the incoming datawith an inverted clock
DTE1: FCD-E1L/FCD-T1L
provides the transmit clock, theattached user equipment
provides the receive clock
DTE2: the attached user
equipment provides bothtransmit and receive clocks.

• When equipped with IR-ETH,

IR-ETH/Q or IR-ETH/QN interface
modules, FCD-E1L and FCD-T1L
transparently connect remote LANs
over E1/T1 links. They filter Ethernetframes, forwarding only frames thatare destined to the WAN. The
IR-ETH/QN port supports
autonegotiation and VLAN frames.

• FCD-E1L and FCD-T1L equippedwith the IR-IP interface module
operate as IP gateways, forwarding
IP packets that are destined to theIP network. This prevents broadcast
to the WAN and enables LAN users
to register for IP multicast groups.

• FCD-E1L and FCD-T1L with theIR-IP interface module also connect
local IP networks to public networks
at full E1/T1 speed, in contrast withconnection over statistical protocols,such as Frame Relay.

• The IR-ETH/QN port is available

APPLICATION

with a 10/100BaseT interface.
Other Ethernet ports are available
with 10BaseT (UTP) or 10Base2(BNC) interfaces.

MANAGEMENT & MAINTENANCE• Setup, control and monitoring ofstatus and diagnostics information
can be activated via:
ASCII terminal connected to theasync control port
SNMP management connectedto the async control port.

• FCD-E1L and FCD-T1L have aninternal SNMP agent and can be
managed by any generic SNMP
station or by the user-friendly,
GUI-based RADview SNMP
network management application.

• FCD-E1L and FCD-T1L support

both dial-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 for remote
out-of-band configuration andmonitoring, as well as for sending
callout alarm messages.

• Inband management can be

performed either via a dedicatedtimeslot with the standard Frame
Relay (RFC 1490), or by using thespare bits (Sa bits) on Timeslot 0(FCD-E1L) or FDL bits (FCD-T1L).
This allows setup, monitoring anddiagnostics of the remote unit.
Inband access by using spare bits onTS0 or FDL bits is possible only ifthese bits are passed transparentlyend-to-end.

FCD-E1L, FCD-T1L
E1/T1 or Fractional E1/T1 Managed Access Units• Maintenance capabilities include

user activated local and remoteloopbacks at the E1/T1 main link anddata ports. Local loopbacks can be
activated either from the terminal orvia the DIP switch. The user canactivate a BER test on the data port.
Additionally, the data port responds
to an ANSI FT1 RDL (T1E1.2/93-003)
inband loop code, generated by theremote FCD-E1L, FCD-T1L or DXC
in a specific bundle of timeslots
allocated only to that port.

• E1 network statistics are stored in•memory, according to RFC 1406.
The statistic information may beretrieved locally, through the control
port.
T1 network statistics are stored inmemory, according to ANSI andAT&T standards. The statisticalinformation may be retrieved bythe service provider (ANSI only) or
locally through the control port.

SPECIFICATIONS
E1 MAIN LINK

• 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• Jitter Performance

As per ITU G.823, ETSI TBR-12 andTBR-13• Connectors
RJ-45, 8-pin, balanced
Two BNC coaxial, unbalanced• Compliance

ITU G.703, G.704, G.706, G.732,G.823, G.826• Performance Monitoring

Local support of CRC-4
Full statistical diagnostics according
to RFC-1406

T1 MAIN LINK

• 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 (main linkonly)
Transmit:
0, -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• Transmit Timing• Compliance• Signal Level• Performance Monitoring

Locked to the system clock
Receive:
0 to -10 dB without LTU
0 to -36 dB with LTU (mainlink only)
Transmit:±3V (±10%), balanced±2.37V (±10%), unbalanced

AT&T TR-62411, AT&T 54016,
AT&T TR-62421, ANSI T1.403
Local support of ESF diagnostics
according to AT&T PUB 54016
Full statistical diagnostics according
to ANSI T1.403-198

DATA PORTS• Connectors
D-type 25-pin RS-530, female,converted to V.35, X.21, orV.36/RS-449 via adapter cables
D-type 25-pin V.24, female• Data Raten x 64 kbps (n=1,2...,31)• Clock Modes

DCE: RX and TX clock to userdevice
DTE1: RX clock to user device;
TX clock from user device (notfor X.21, V.24)
DTE2: RX and TX clock from userdevice (not for X.21, V.24)• Control Signals

CTS follows RTS or constantly ON,
soft-selectable
DSR constantly ON, unless in testmode
DCD constantly ON, unless in sync
loss

ETHERNET BRIDGE/ROUTER PORT
Refer to Table 1 below.

• Interface Connectors

IR-ETH, IR-ETH/Q, IR-IP: 10BaseT(UTP) with shielded RJ-45 or
10Base2 (BNC) with two BNC
coaxialIR-ETH/QN: 10/100BaseT (UTP)with shielded RJ-45

GENERAL• System Clock

Internal clock:±50 ppm
Loopback timing:±130 ppm
External timing from data port:±130 ppm• Diagnostics

Main E1/T1 link:
Local and remote loopback
Data port:
Local loopback
Remote loopback
Data port BER test
Inband code activated loopback
per data port
T1 network loopback,code-activated (FCD-T1L only)FCD-E1L, FCD-T1L
E1/T1 or Fractional E1/T1 Managed Access Units
Consecutive (bundled)
User-defined• Management PortInterface and connector:
V.24/RS-232, 9-pin D-type,femaleFormat: Asynchronous
Baud rate: 1.2-19.2 kbps,
autobaud
Character: 8 bit no parity, 7 bit
odd or even parity

FCD-E1L/*/~/&/%
E1/Fractional E1 Access Unit
FCD-T1L/~/&/%
T1/Fractional T1 Access Unit••••

CABLES* Specify E1 main link interfacetype:
B for balanced with RJ-45
connector
U for unbalanced with BNCconnector• Indicators•ETBQ for BNC Ethernet bridge
VLAN (10Base2)
ETUR for UTP Ethernet router(10BaseT)ETBR for BNC Ethernet router(10Base2)

ORDERING• Timeslot Allocation

General: PWR (green), TST(yellow), ALM MAJ, ALM MIN(red), AUTO CONFIGURATION
Main E1: LOC SYNC LOSS (red),REM SYNC LOSS (red)Main T1: RED ALARM (red), YEL
ALARM (yellow)
Front Panel Controls
Single push-button for auto
configuration
AlarmsLast 100 alarms are stored andavailable for retrieval. Each alarm istime stamped.
PhysicalHeight:
4.4 cm / 1.75 in
Width: 21.5 cm / 8.5 in
Depth: 24.3 cm / 9.6 in
Weight0.9 kg / 2.0 lb
PowerAC: 100 to 240 VAC; 47 to 63 Hz
DC: -48 VDC (-40 to -57 VDC)
Power consumption: 5W max.
Environment
Temperature: 0-50°C / 32-122°F
Humidity:
up to 90%,
non condensing

The following cables convert
FCD-E1L’s or FCD-T1’s 25-pin data
port connectors into the respective
interface. Cable length is 2m (6 ft).
CBL-HS2/*/#Adapter cables for DB-25 channelconnectors~ Specify power supply voltage:
AC for 110 VAC to 240 VAC
48 for -48 VDC* 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 data port interface:
530 for RS-530
V35 for V.35
X21 for X.21
449 for V.36/RS-449% Specify optional second data portinterface:
530 for RS-530 interface
V35 for V.35 interface
X21 for X.21 interface
V24 for V.24 interface449 for RS-449 interface# Specify cable connector type:
F for female
M for maleNote: Cables for DCE clock mode
operation are supplied for each data port
according to interface option specified.
Cables for DTE1 and DTE2 mode
operation must be ordered separately.

ETQN for UTP Ethernet bridge
VLAN (10/100BaseT)ETUB for UTP Ethernet bridge(10BaseT)ETBB for BNC Ethernet bridge(10Base2)
ETUQ for UTP Ethernet bridge
VLAN (10BaseT)

RM-28
Hardware for mounting one or twounits in a 19" rackdata communications
www.rad.com

Table 1. Ethernet Interface Modules Characteristics
Line CodeWAN ProtocolInterface
ModuleLAN Table[addresses]

Filtering &Buffer
Forwarding[frames per second] [frames]

IR-ETH

10,00015,000256

Manchester

HDLC

IR-ETH/Q

2,000

2,000

256

Manchester

HDLC

IR-ETH/QN

1,024

150,000

85

IR-IP

––256

10BaseT: Manchester
100BaseT: MLT3
Manchester

HDLC
PPP (PAP/CHAP)
Frame Relay (RFC 1490)
HDLC

Note: All the Ethernet interface modules conform to the IEEE 802.3/Ethernet V2 standard. Additionally, IR-ETH/Q supports IEEE
802.1/q frames, and IR-ETH/QN conforms to IEEE 802.1q (relevant parts), 802.1p and 802.3x.
 1991–2003 RAD Data Communications Ltd.
All other trademarks are the property of their respective holders.

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

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

165-100-10/03

Specifications are subject to change without prior notice.