[Asterisk-Users] Driver for channel SIP/210-7450' does not support indication 3, emulating it

[Jeremy Koski]

All of my phones are Cisco 7960's. Each one of them occasionally show up 
in the logs with the follow message:


messages:Oct 21 09:35:43 DEBUG[25423] channel.c: Driver for channel 
'SIP/210-7450' does not support indication 3, emulating it


What does this mean and how do I fix it? I am using asterisk-1.2.1 with 
Cisco SIP version 7.4.


Thanks.