Troubleshooting Vtl Calls - 3Com SuperStack 3 NBX Administrator's Manual

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HAPTER IAL
Troubleshooting VTL
Calls
Table 21 VTL Errors and Corrections
Error Condition
Long pause after dialing. Telephone display contains
"VTL" during the pause. Busy signal is then heard.
After you finish dialing a VTL call, you get a busy
signal and the message "All ports busy" appears in
the telephone display panel.
After you finish dialing a VTL call, you get a busy
signal and the message "Invalid Number" appears in
the telephone display panel.
No audio
Caller ID information does not appear correctly in
the telephone display panel.
P
LAN
Table 21 contains a list of error situations, the possible causes and the
action to take in each case.
Possible Causes
Remote server does not
respond
1. No VTL license installed.
2. VTL device extensions not
added to Extension List
*0006.
3. All local VTL connections
are currently in use.
4. All VTL connections at the
remote site are currently in
use.
1. Local dial plan is not
properly configured.
2. Dial plan on the remote
(target) system in not properly
configured.
3. You are trying to use
hop-off without the necessary
password.
1. Telephones are not
configured to use either IP
On-the-Fly or Standard IP.
2. VTL Audio compression is
supported on only one of the
two NBX systems.
1. Invalid local pretranslator.
2. VTL extensions are not in
the VTL pretranslator "Devices
Using" table.
Actions
Test the connection to the
remote system using the
Query Remote function.
1. Verify that the licenses
appear when you access the
tab.
2. Verify that the *0006
extension contains the VTL
device extensions.
3. On the Virtual Tie Line tab,
verify that there is at least one
idle VTL connection.
4. Use the Query Remote
function to verify that there is
at least one idle VTL
connection.
1. Examine the local dial plan
for errors.
2. Examine the dial plan on
the remote system for errors.
3.Verify that the password for
the remote system is used in
both dial plans.
1. Verify that the IP setting in
the System Settings,
System-wide dialog box is "IP
On-the-Fly" or "Standard IP."
Install a license and change
the setting, if necessary.
2. Verify that audio
compression is enabled on
both systems.
1. Examine the local dial plan
for pretranslator errors.
2. Verify that VTL extensions
appear in the left-hand table
for the pretranslator.