Installation Procedures 55
CBR Module LEDs The CBR module features the following front panel
indicators:
Inservice (green)—Powers up in the “off” state and illuminates when you set the
administrative status of the T1-DSX/E1 or serial port to In Service. See
“Configuring the CBR Module” in Chapter 4 for details about how to set the
administrative status of the ports on the CBR module.
ALARM (red)—Powers up in the “off” state and illuminates when an alarm
condition is detected on the corresponding T1-DSX/E1 or V.35 line.
Figure 25 PathBuilder S330 CBR Module LEDs
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.
Table 21 lists the VCM T1-DSX pinouts.
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).
Alarm
Inservice
T1-DSX/E1 ports
Serial (RS-366
and V.35/RS-449/
RS-530/X.21) port
Table 21 VCM T1-DSX/E1 Pinouts
PIN 1 RX (ring)
PIN 2 RX (tip)
PIN 3 NC
PIN 4 TX (ring)
PIN 5 TX (tip)
PIN 6 NC
PIN 7 NC
PIN 8 NC
