[Asterisk-Users] does not implement 'PUBLISH'

[Hall, Eric M.]

Not sure what this is.
When I call my own ext the call will ring for 10 sec and goto the
voicemail. However the phone will keep ringing and I see this on the
asterisk CLI
 Jul 27 11:17:48 WARNING[3563]: chan_sip.c:8666 handle_response: Host
'192.168.0.200' does not implement 'PUBLISH'


Have no idea what this is talking about 
192.168.0.200 is a cisco 7960G