Specifications

T D M N T U S
112
RAD Data Communications 2009 Catalog
The FCD-2L is a single port access unit for full
or fractional E1 services. Data port rates are
selectable for any multiple of 56 kbps or
64 kbps up to 1,984 kbps. Alternatively, the
data port can be replaced by an Ethernet bridge,
providing direct connection to the LAN. User
data is placed into the E1 frame, using only the
required number of timeslots. Timeslot
assignment is according to the data port speed
and is consecutive, starting from any timeslot.
The FCD-2L can be ordered with or without an
LTU (line termination unit). The integral LTU
ensures a range of up to 2 km (1.2 miles).
The FCD-2L meets all requirements of ITU for
G.703, G.704, G.706, G.732 and G.823. It
supports both two and 16 frames per
multiframe, with or without CRC-4. Zero
suppression over the line is HDB3.
The unit may be clocked from the recovered
receive clock (LBT) of the main E1 link or from
an internal oscillator.
The data channel interface is RS-530. Adapter
cables are available for V.35, V.36/RS-422 or X.21.
The unit also supports an optional UTP bridge
port.
FCD-2L setup and control is by internal jumpers.
Front panel switches control all diagnostic
options.
Diagnostics include user-activated local
loopbacks on the main E1 link and DCE data
port. A pseudo-random data pattern (BERT) can
be used to check the transmission path and the
local and remote units. The FCD-2L can display
major and minor alarms, and indicate bit error
rate on the E1 line in excess of 1 x 10
-3
.
The FCD-2L is available as a standalone unit or
as a card for a 19-inch rack. An adapter kit
enables installation of one or two standalone
units in a 19-inch rack.
FCD-2L
E1 or Fractional E1 Access Unit
The FCD-24 is an integrating multiplexer for full
and fractional E1 services. Two or four
synchronous data channels and one E1 sub-link
can be connected over the public E1 network.
The E1 sub-link enables connection of user-
defined timeslots from a PBX link to the main
E1 interface.
The FCD-24 interface connections are modular,
supporting two or four channels with or without
an E1 sub-link.
Data rates are selectable for any multiple of
64 kbps. Selectable timeslot allocation places
data into timeslots either consecutively or user-
defined, without restriction.
Channel interface is V.35, RS-530 or X.21. An
interface for V.36/RS-422 is also available using
an adapter cable.
The FCD-24 is compatible with virtually all
carrier-provided E1 services, meeting all
requirements of ITU recommendations G.703,
G.704 and G.732. It supports both two and 16
frames per multiframe. Zero suppression over
the line is HDB3. An optional integral LTU (line
termination unit) supports a range of up to 2 km
(1.2 miles).
Flexible clock source selection on the main link
and data channels allows support for most
applications.
Setup, control and monitoring of status and
diagnostic information can be activated via the
front panel or via a terminal or PC, or remotely
via dial-up modems.
Maintenance capabilities include local and remote
loopbacks, as well as a built-in BER tester.
For dial-out operation, the FCD-24 automatically
dials a pre-programmed number whenever an
alarm event occurs.
FCD-24
Integrating E1 Multiplexer
• Single port access to E1 or fractional E1
services
• Optional built-in LTU
• Selectable sync data rates: n x 56 kbps,
n x 64 kbps
• Data interfaces: V.35, RS-530,
V.36/RS-422, X.21
• Integrated Ethernet bridge option
• E1 interface complies with ITU G.703,
G.704, G.706, G.732, and G.823
• Main link diagnostics include loopbacks,
BER test and data port monitoring
• DTE2 support
• Integrates high speed data and an E1
link into E1 or fractional E1 services
• Two or four data channels
• Data interfaces: V.35, RS-530/V.36 or X.21
• Selectable data rates: n x 64 kbps
• Setup and control via front panel or
supervisory port
• Complies with ITU G.703, G.704 and G.732
• Dial-out on alarm events
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For latest updates visit www.rad.com