Zhone Technologies IMACS-200 - Manual (Page 147)

WAN Ports 5-17
WAN ports WAN port Error Messages
5.4 WAN port Error Messages
Refer to Appendix B in this Guide for further information on Error Messages regarding this
port.
5.5 WAN port Troubleshooting
The WAN port may be faulty if a CGA-Red alarm is in progress on either port of the port. This
alarm occurs if the incoming network signal is lost, or if the WAN port is out of frame with
that signal. To isolate the trouble, proceed as follows:
1. See if similar alarms are also present on any other T1 or E1 lines and WAN ports in the
system. If so, the trouble may be with the Interface port, which connects the T1 or E1
signals from the WAN ports to the external network. If the trouble is only on one T1 or
E1 line connected to the WAN port, continue with step 2.
2. Perform a local T1 or E1 signal loopback toward the CPE, and see if the CGA alarm
clears after about 10 to 30 seconds. If it does, the WAN port is good; go to step 3.
Otherwise, go to step 4.
3. Check the local network equipment receiver, cabling to the Interface port at the local
system, and the far-end system or network transmitter.
4. Move the WAN port with another WAN port., for example wan-1 to wan-3.
5. If the WAN port is determined to be faulty, return the faulty unit for repair to the
location specified by your distributor.