Version 5.2/5.4 3 January 2009
Troubleshooting Guide Contents
Contents
1 Introduction ......................................................................................................... 7
2 IP Connectivity .................................................................................................... 9
2.1 I Cannot Access Web or Ping the Device ................................................................ 9
2.2 How Do I Pi
ng a Network Entity from the Device ................................................... 10
3 TDM (PSTN) Connectivity ................................................................................ 13
3.1 How Do I Clear Trunk Alarms ................................................................................. 13
3.2 How Do I Check a Trun
k's Physical Integrity .......................................................... 15
3.3 How Do I Check for E1/
T1 Clock Slips ................................................................... 15
3.4 How Do I Switch Between E1 and T1 Trunk Protocol Types
................................. 16
3.5 Why Can't I
Stop an Active Trunk ........................................................................... 17
3.6 How Do I Configure PSTN Clock Synchronizatio
n ................................................. 17
4 Call Setup .......................................................................................................... 19
4.1 How Do I Troubleshoot IP-to-Tel Call Setup .......................................................... 19
4.1.1 Initial IP-to-Tel Troubleshooting .............................................................................. 20
4.1.2 Advanced IP-to-Tel Troubleshooting for Digital Interfaces ..................................... 23
4.1.3 Advanced IP-to-Tel Troubleshooting for FXS Interfaces ........................................ 24
4.1.4 Advanced IP-to-Tel Troubleshooting for FXO Interfaces (1-Stage Dialing) ........... 25
4.1.5 Advanced IP-to-Tel Troubleshooting for FXO Interfaces (2-Stage Dialing) ........... 27
4.2 How Do I Troubleshoot Tel-to-IP Call Setup .......................................................... 28
4.2.1 How Do I Check Device (Tel-to-IP) Connectivity .................................................... 28
4.2.2 Initial Call Setup Troubleshooting ........................................................................... 28
4.2.3 Advanced Tel-to-IP Troubleshooting for Digital Interfaces ..................................... 32
4.2.4 Advanced Tel-to-IP Troubleshooting for FXO Interfaces ........................................ 34
4.2.5 Advanced Tel-to-IP Troubleshooting ...................................................................... 36
5 Caller ID ............................................................................................................. 39
5.1 Why Doesn't the FXO Device Detect Caller ID ...................................................... 39
5.2 Why Doesn't the Phone Detect Caller ID (F
XS) ..................................................... 41
5.3 Why Doesn't Digital Device Detect T
el-to-IP Caller ID ........................................... 42
5.4 Why Doesn't Digital Device Generate Caller ID to Tel
........................................... 42
6 Voice Quality ..................................................................................................... 43
6.1 How Do I Troubleshoot Distorted Voice ................................................................. 43
6.2 How Do I Troubleshoot
Voice Echo ....................................................................... 44
6.3 How Do I Troubleshoot
Voice Delay ...................................................................... 46
7 Call Disconnect ................................................................................................. 47
7.1 Why Doesn't the FXO End a PBX/PSTN Call ........................................................ 47
7.2 Why Do Call
s Randomly Disconnect? .................................................................... 49
7.3 Why Don't Calls Disconn
ect Upon ISDN Disconnect Message .............................. 50
7.4 Why Does the PBX
Disconnect IP-to-Tel Calls ...................................................... 50
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