Troubleshooting guide

Contents
vii
Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
Version 1
Troubleshooting Serial Lines 8-10
Optical Signal Input/Output Problems 8-10
Using Bit Error Rate Tests 8-13
Using Loopback Tests 8-16
CHAPTER 9 Troubleshooting Cisco Media Gateways 9-1
Media Gateway Management 9-1
MGCP on Cisco IOS Software 9-2
DHCP on Cisco IOS Software 9-2
Cisco MGX8850 9-2
MGX 8850 Diagnostics 9-3
Command Line Interface 9-4
Diagnostic Troubleshooting 9-7
Troubleshooting Alarms 9-8
Viewing and Responding to Alarms 9-8
AXSM Card Controls 9-11
RPM-PR Card Controls 9-12
Displaying Alarm Reports in the CLI 9-13
PXM45x Alarm Issues 9-17
Displaying Log File Information 9-20
Troubleshooting the Gateways 9-20
D-Channel 9-20
Data Path Troubleshooting 9-23
There Is No Voice 9-23
Fax/Modem Fails 9-26
COT/Testline Fails 9-26
Tone Detection/Play Fails 9-26
Line Interface and Switching Path Troubleshooting 9-27
Call Control 9-28
Debugging Commands 9-28
Turning on Trace Debugging 9-29
Media Gateway Errors 9-30
System Redundancy 9-30
Troubleshooting VISM Cards 9-31
VISM Card LEDs 9-32
VISM and PXM Display, Log, and Diagnostic Loopback Path CLI Commands 9-34