Specifications

Installation and Operation Manual Chapter 1 Introduction
FOM-E1/T1 Ver. 2.0 Physical Description 1-3
E1/T1 Interface
• The electrical interface meets requirements of ITU G.703 standard for E1 and
T1.
• FOM-E1/T1 supports both balanced and unbalanced interfaces.
When FOM-E1/T1 detects electrical interface levels below G.703 electrical levels,
the modem transmits an “All 1 signal” (AIS) to the optical interface.
Test and Diagnostics Capabilities
• FOM-E1/T1 supports local and remote loopback activation.
• FOM-E1/T1 features a dry contact alarm port (DB-9) for attaching an external
alert device.
• When an AIS is detected at the optical or electrical interface, the modem
transparently converts the signal and alerts the user via front panel LEDs.
1.2 Physical Description
FOM-E1/T1 is a compact unit, intended for installation on desktops or shelves.
FOM-E1/T1 can be installed in a 19-inch rack using an optional rack-mount
adapter kit.
Figure 1-2 shows FOM-E1/T1.
Figure 1-2 FOM-E1/T1 3D View
The front panel LEDs indicate the modem status. Front panel indicators and
controls are described in C
hapter 3.
The rear panel connectors and internal jumpers are described in C
hapter 2 .