Installation Procedures 53
OC3/STM-1 LEDs In addition to the common LEDs described earlier in this
chapter, the following LEDs indicate the status of the OC3/STM-1 port. (See
Figure 24.)
OC3/STM-1 Alert (red)—Powers up in the “off” state and illuminates when a
Loss of Signal (LOS), Loss of Frame (LOF), Loss of Pointer (LOP), or Loss of ATM
Frame (LOAF) condition is detected on the incoming OC3/STM-1. If none of these
conditions is present, the OC3/STM-1 ALARM LED is off.
OC3/STM-1 Active (green)—Powers up in the “off” state and illuminates when
the OC3/STM-1 is online.
Figure 24 OC3/STM-1 Port LEDs
Connecting to the CBR Module
The CBR 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 CBR DSX Configuration Menu. See “Configuring the CBR 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 19 lists the CBR T1-DSX/E1
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).
The serial port of the PathBuilder S330/S310 CBR module has two types of
interface: V.35 for video data and RS-366 for video dial. These interfaces are
broken out from a 50-pin connector on the S330/S310 via a Y cable. Use the
V.35/RS-366 serial CBR connector to connect directly to H.320 video codec devices
such as PictureTel, Vtel, and CLI.
Table 19 CBR 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
Alert
Active
