Overview 1-1
Chapter 1 Introduction 1.1 Overview
This manual provides information on the technical characteristics, installation and
operation of the FOM-E1/T1 fiber optic modem as a standalone unit, and as
FOM-E1/T1/R rack-mount card for the ASM-MN-214 modem rack.
FOM-E1/T1 is a fiber optic modem for transmission of E1 (2.048 Mbps) or T1
(1.544 Mbps) over multimode or single-mode fiber optic media. The
communication equipment is connected to FOM-E1/T1 according to the ITU
G.703 standard. The modem is designed to operate with several types of fiber
optic cables and connectors. The electrical signals are connected through BNC
connectors or a DB-15 connector. LED indicators show the operational status of
the modem on the front panel. Alarms indicating faults in modem operation are
provided to a supervisory port. Local and remote loopback tests are available for
diagnostics.
Versions
The following versions of the FOM-E1/T1 modem are available:
• FOM-E1/T1 – standalone unit
• FOM-E1/T1/R – a plug-in card for installation in the ASM-MN-214, 19-inch
modem rack, holding up to 14 cards (see Chapter 5 for the FOM-E1/T1/R
description).
Power Supply Options
The following power supply options are available:
• AC source: 115 VAC or 230 VAC
• DC source: 24 VDC or -48 VDC.