3Com S330 manual Connecting to the CBR Module, CBR T1-DSX/E1 Pinouts

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

Alert

Active

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.

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

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.