Cisco Systems H.323/SIP Manual De Usuario

Verify that the E.164 Address and H.323 ID fields are correct for H.323 outdials. 

Verify that the Display Name, User Name, and Session Name fields are correct for SIP outdials.

If Release 5.2.1 is installed on a gateway with multiple IP addresses, verify that Cisco Unified 
CallManager has an H.323 gateway configuration for each address.

Verify that the gateway settings created for Release 5.2.1 allow dialing out.

See the following sections for information about troubleshooting audio problems:

Possible Cause—The caller is using a low-quality headset with the Cisco IP phone.

Corrective Action—Reduce the speaker volume to a volume that is comfortable but not loud enough to 
cause feedback from the microphone back to the other end of the call.

Corrective Action—Use a headset that is approved by Cisco Systems.

Possible Cause—Cisco IP phone audio settings need adjustment.

Corrective Action—During a meeting, on a Cisco 7960, press the blue i button twice to obtain network 
settings. The information that you receive provides statistics needed to optimize your network for VoIP.

Corrective Action—Lower the volume. Voice quality degrades if the volume on a Cisco IP phone is set 
to maximum. 

Possible Cause—Network settings may need to be modified.

Corrective Action—Consider the CoS/QoS setting on your network. If the CoS setting is IP Precedence 
5, you should hear considerable improvement in audio quality.

Corrective Action—Establish locations on your network. Locations enable you to regulate voice 
quality by limiting the amount of bandwidth that is available for calls. 

For more information, refer to the Location Configuration section in the appropriate

for your release.