Avaya X330WAN manual Troubleshooting X330W-2USP, Using Loopbacks

Troubleshooting X330W-2USP

Corrective Actions:

•Call the administrator of the remote module.

•Wait for the signal to return.

Troubleshooting X330W-2USP

You can obtain statistical information regarding module performance, error rates, and DTE/DCE signal statuses using the show interfaces command. X330W-2USP does not indicate a failure via alarm LEDs.

X330W-2USP provides error messages in the following situations:

•Cable connection fault - When there is a fault with the cable connections or when a DCE cable is connected. Check the cables and connections.

•Host communication fault - When the X330WAN can not establish a connection with the host P330 switch. In this case, verify that the appropriate software versions are installed in the host P330 switch.

If X330WAN (or the connected DCE) reports data errors (CRC, etc.), there might exist a phase shift between the data and the accompanying clock. In this case use the invert txclock command to invert the transmit clock signal (TxC) from the DCE.

Using Loopbacks

The X330W-2DS1 module supports the following loopback types:

•Diag Loopback (E1/T1) - The X330W-2DS1 CPU instructs the Line Framer to create a loop towards the CPU. A Blue Alarm (AIS) is sent on the line to the peer module. The Diag Loopback is illustrated in Figure 5.1.

Figure 5.1 Diag Loopback

X330WAN

CPU

Tx

Rx

Line

Framer

Blue Alarm WAN

•Local Line Loopback (E1/T1) - The X330W-2DS1 Line Framer creates a loop on the line towards the peer module. The Local Line Loopback is illustrated in Figure 5.2.

Avaya X330WAN User’s Guide 83