Table of Contents
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Configuring Voice over IP
Command
Step 8
music-threshold number
Step 9
description string
Step 10
comfort-noise
Validation Tips
You can check the validity of your voice-port configuration by performing the following tasks:
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Troubleshooting Tips
If you are having trouble connecting a call and you suspect the problem is associated with voice-port
configuration, you can try to resolve the problem by performing the following tasks:
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Fine-Tune FXO and FXS Voice Ports
Depending on the specifics of your particular network, you might need to adjust voice parameters
involving timing, input gain, and output attenuation for FXO or FXS voice ports. Collectively, these
commands are referred to as voice-port tuning commands.
In most cases, the default values for voice-port tuning commands are sufficient.
Note
To configure voice-port tuning for FXO and FXS voice ports, perform the following steps:
Step 1
Identify the voice port and enter the voice-port configuration mode using the voice-port command.
For each of the following parameters, select the appropriate value using the commands indicated:
Step 2
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T1/E1 Digital Voice Port Adapter Installation and Configuration
4-24
Pick up the handset of an attached telephony device and check for a dial tone.
If you have dial tone, check for dual tone multifrequency (DTMF) detection. If the dial tone stops
when you dial a digit, then the voice port is most likely configured properly.
Use the show voice-port command to verify that the data configured is correct.
Ping the associated IP address to confirm connectivity.
Use the show voice-port command to make sure that the port is enabled. If the port is offline, use
the no shutdown command.
If you have configured E&M interfaces, make sure that the values pertaining to your specific PBX
setup, such as timing or type, are correct.
Check to see if the voice network module has been correctly installed. For more information, refer
to the installation document Voice Network Module and Voice Interface Card Configuration Note
that came with your voice network module.
Input gain using the input gain command
Output attenuation using the output attenuation command
Echo cancel coverage using the echo-cancel enable and echo-cancel coverage commands
Chapter 4
Purpose
(Optional.) Specify the threshold (in decibels) for on-hold music.
Valid entries are from –70 dB to –30 dB.
(Optional.) Attach descriptive text about this voice-port
connection.
(Optional.) Specify that background noise will be generated.
Configuring the PA-VXA, PA-VXB, and PA-VXC
OL-3592-02
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Table of Contents
Troubleshooting
