Symptoms: A Cisco IOS VoIP gateway may experience audio issues such as dead- air or one-way audio for VoIP call present on the gateway. When this occurs, the following error message will be displayed on the gateway: %C5510-1-NO_RING_DESCRIPTORS: No more ring descriptors available
Conditions: The symptom is observed on a Cisco 2801 VoIP gateway that is running Cisco IOS Release 12.4(20)T or Release 12.4(15)XZ1.
Workaround: There is no known workaround to prevent this issue while using Cisco IOS Release 12.4(20)T or 12.4(15)XZ1 while using the Cisco 2801 router. Use an earlier release to avoid this issue.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...