Connecting To The Voice Compression Module - 3Com SuperStack II PathBuilder S330 Reference Manual

Connecting to the Voice Compression Module

The voice compression module provides an RJ48 DSX interface for T1-DSX/E1
traffic. Line Build Outs (LBOs) to DSX of up to 655 feet are supported. You must
configure the LBOs in the VCM Port Configuration Menu. See "Configuring the
Voice Compression Module" in Chapter 4, for details. You can typically make local
connections to DTE equipment without DSU/CSUs, as long as the equipment
supports a direct T1-DSX/E1 interface and can recover a T1-DSX/E1 signal.
If you are using a G703 coax physical connection to connect the E1 line to the
interface, you must use the E1 Balun Adapter (part number 3C63904).
Voice Compression Module LEDs In addition to the common LEDs described
earlier in this chapter, the following LEDs indicate the status of the voice
compression module. (See Figure 31.)
PWR — Illuminates when the VCM is receiving power
FAIL — Illuminates when the VCM card fails
TEST — Illuminates during powerup, as internal diagnostics are being
performed and during loopbacks
STS 0 (Status 0) — Blinks green during normal operation
STS 1 (Status 1) — Illuminates when the VCM port is in service
INS — Illuminates when the VCM card is in service
ALM — Illuminates when there is an alarm present on the VCM card
Figure 31 Voice Compression Module LEDS
Installation Procedures
ALM
INS
STS 1
STS 0
TEST
FAIL
PWR
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