
FCD-E1L, FCD-T1L
E1/T1 or Fractional E1/T1 Mana
ed Access
Units
FEATURES
• Managed access units for
E1/T1 or Fractional E1/T1
• E1/T1 main link interfaces
support both framed and
unframed signals
• Provide one or two data
ports 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 or
without VLAN support) or IP
router
• Autoconfiguration function
for plug-and-play operability
• SNMP agent
• Management:
Out-of-band via V.24
supervisory port
Inband via TS0 or
dedicated timeslot over
Frame Relay
• Dial-in option for remote
out-of-band management
• Dial-out for alarm report
• Enhanced diagnostics
include:
User activated local and
remote loopbacks
Integrated BER tester
Fractional E1/T1 inband
loop
• Stores 24 hours of E1
network performance
monitoring and last
100 alarms
• Alarm mask configurable for
any alarm
DESCRIPTION
• FCD-E1L and FCD-T1L are
managed access units, which can be
used as rate and interface
converters for E1/T1 and Fractional
E1/T1 services.
• FCD-E1L and FCD-T1L support a
single or dual serial n x 64 kbps data
user interface. Instead of serial data
interface port, an Ethernet LAN
interface can be ordered, allowing
LAN-to-LAN connectivity over TDM
media.
• FCD-E1L and FCD-T1L also operate
opposite RAD's modular DXC
(DACS) products, as well as other
vendors' E1/T1 equipment, to
support 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 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. It
can also accept a 2048 kbps data
stream and convert it to an ITU-T
Rec. G.703 unframed signal for
transport over the E1 main link. Line
code is HDB3. The integral LTU
ensures a range of up to
2 km/1.2 miles and is soft-selectable.
• The T1 interface is compatible with
virtually all carrier provided T1
services, including ASDS from AT&T
and complies with
TR-62421. The T1 interface supports
D4 and ESF framing formats. Zero
suppression over the line is selectable
for 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 from
each 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-play
connectivity. Upon connection to
the E1/T1 link, the units detect the
E1/T1 parameters and perform
autoconfiguration accordingly. This
E1/T1 learning process can be
activated via either a push-button
on the FCD-E1L/FCD-T1L front
panel or a terminal command. The
state of the learning process is
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