E1, T1 Fiber Optic Modem

• User selectable data rates from 56 kbps to 2.048 Mbps
• Transparent to framing (ITU G.704)
• Conforms to all relevant ITU standards, including V.54 loopback diagnostic testing and V.52 BER testing
• Large variety of data interfaces supported
• Supports balanced and unbalanced interfaces
• Operates over multimode or single mode fiber
• Available as a standalone, single modem card, or dual modem card suitable to be installed in an ASM-MN-214 chassis

• Extends the range of equipment with electrical E1 or T1 interfaces over fiber optics; up to 144 kilometers (89.4 miles)
• WDM supported, reducing access costs

Electrical to optical signal conversion

The FOM-E1 or T1 fiber optic modem converts an E1 or T1 electrical signal into an optical signal. After the conversion, the signal is transmitted over fiber optic cable, extending the E1 or T1 service range up to 144 km (89.4 miles).

The FOM-E1 or T1 is transparent to E1 or T1 framing (G.704), which enables it to transmit both framed or unframed E1 or T1 signals.

Using the FOM-E1 or 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 or 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
• WDM for single fiber extension

FOM-E1 or T1operation 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.

Front panel LEDs indicate system faults in the electrical and fiber optic circuits.