|RAD T1 Fiber Optic Modem|
The FOM-E1/T1 fiber optic modem converts an E1/T1 electrical signal into an optical signal. After the conversion, the signal is transmitted over fiber optic cable, extending the E1/T1 service range up to 100 km (62 miles).
The FOM-E1/T1 is transparent to E1/T1 framing (G.704), which enables it to transmit framed or unframed E1/T1 signals.
Using the FOM-E1/T1 opposite the DXC cross connect system, Megaplex access multiplexer or FCD access unit reduces the cost of the fiber optic link when accessing the SDH/SONET network.
The FOM-E1/T1 supports various optical interfaces: - 850 nm for multimode fiber - 1310 nm for single mode or multimode fiber - 1550 nm laser diode for extended range over single mode fiber.
FOM-E1/T1 operation complies with ITU G.703, G.921 and G.956 standards. The modem supports activation of local and remote loopbacks in compliance with the ITU V.54 standard.
||T1 Fiber Modem - FOM-T1|
The FOM-T1/E1 T1 fiber modem extends the range of a T1 or E1 circuit over fiber.
•Fiber optic modem, extending the range of E1/T1
services over fiber optic cables up to 100 km (62 miles)
•Transparent to E1/T1 framing (G.704)
Operates opposite RAD's DXC cross-connect system,
•Available with laser diode option for extended ranges
•Conforms to all relevant ITU series standards, including
V.54 diagnostics support
•Operates over single mode or multimode fibers
•Relays minor and major alarm conditions
•Includes front panel LED indicators for status monitoring
•The FOM-E1/T1 fiber optic modem converts an E1/T1 electrical signal into an optical signal. After the conversion, the signal is transmitted over fiber optic cable, extending the E1/T1 service range up to 100 km (62 miles).
•FOM-E1/T1 supports various optical interfaces:
850 nm for multimode fiber
1310 nm for single or multimode fiber
1550 nm for extended range over single mode fiber.
•FOM-E1/T1 operation complies with ITU G.703 and G.955 standards.
•The modem supports activation of local and remote loopbacks in compliance with ITU V.54.
•Alarm relay port transmits the following alarm conditions:
Major alarm . Low level of E1/T1 electrical input or high bit error rate at the fiber optic interface Minor alarm . AIS received at electrical or fiber optic interface.
•Front panel LEDs indicate system faults in the electrical and fiber optic circuits.
•FOM-E1/T1 is also available as a plug-in card for RAD.s ASM-MN-214, 19-inch card cage.
E1/T1 ELECTRICAL INTERFACE
E1: 2.048 Mbps
T1: 1.544 Mbps
E1: 75. unbalanced or 120. balanced
T1: 100. balanced
Balanced: 15-pin D-type, female
Unbalanced: two BNC
FIBER OPTIC INTERFACE
Specifications and Ranges
See Table 1
ST, SC or FC/PC (see Ordering)
Complies with ITU V.54; local and remote loopbacks activated via front panel slide switch
PWR . ON when the unit is powered up
OPTICAL AIS . ON when "all 1s"
string is received at fiber optic
OPTICAL ERR . ON when bit
error rate is 10-6 or worse
ELECTRICAL LOW . ON when
electrical interface input is
below G.703 level
ELECTRICAL AIS . ON when
"all 1s" string is received at
Alarm Relay Port
Dry contact via 15-pin, D-type,
Operates as Normally Open and
Normally Closed, using different
AC: 115 or 230 VAC (±10%),
47 to 63 Hz, 6W
DC: 24 VDC (±10%) or
-48 VDC (-36 to -72 VDC)
Height: 4.4 cm / 1.7 in
Width: 17.9 cm / 7.0 in
Depth: 20.3 cm / 8.0 in
Weight: 1.1 kg / 3.0 lb
Humidity: Up to 90%,
|E1/T1 fiber optic modem|
|E1/T1 fiber optic modem, card version for ASM-MN-214 card cage|
|*||Specify power supply:|
|115 for 115 VAC|
|230 for 230 VAC|
|24 for 24 VDC|
|48 for -48 VDC|
|#||Specify fiber optic interface type|
|(# for connector type, followed by & for optical wavelength):|
|ST for ST type connector|
|SC for SC type connector|
|FC for FC/PC type connector|
|&||85 for 850 nm, multimode, VCSEL|
|13 for 1310 nm, single mode, LED|
|13L for 1310 nm, single mode, laser diode|
|15L for 1550 nm, single mode, laser diode|
|Special hardware for mounting one or two FOM-E1/T1 units in a 19-inch rack|
see part numbers for ordering
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