VOIP call Failed (Error Code 15) in Prime Event log.

[Jacob Snyder]

I'm seeing the following events in Prime Infrastructure related to Cisco 7925 phones.

VOIP Call Failed for "(Error Code 15) occurred on client "xx:xx:xx:xx:xx:xx' which was associated to AP <APName> on interface 802.11b/g.

I can't seem to find where this error code 15 is defined.  The closest I was able to find was error code 15 under gatekeeper codes in the following document which may or may not be relavent.

http://www.cisco.com/en/US/docs/ios/voice/monitor/configuration/guide/vt_voip_err_cds_ps6350_TSD_Products_Configuration_Guide_Chapter.html

Any insight into this would be appreciated.

Jake

P.S. No voip call jokes on 802.11b/g please

[whilenski]

Were you able to find a resolution for this?  I have the same issue.

[Jacob Snyder]

It was funny settings under the Adv WLAN profile on the phone. Reset the offending handsets and reconfigured and they were fine.

Sent from Cisco Technical Support iPhone App

[whilenski]

Now I'm curious what the funny settings were.  I set mine to use non-overlapping channels for the A and G radios, however, this doesn't appear to resolve it.  I am wondering what settings you found worked.

[Jacob Snyder]

It had 18Mbps set as the min phy rate.  I also think it has to do with CAC issues at 18Mbps that are pretty well noted and differeing mandatory rates across the 802.11b/g/n and 802.11a/n networks on the controller.  When the phone would roam onto a radio with 18Mbps was the min mandatory rate, it would drop and give this error.

[whilenski]

Thanks for the reply!  Mine are set to the default PHY rate, however, it gives me something to double check on the wireless side to make sure it is enabled.