[asterisk-users] Lots of warnings: SUBSCRIBE failure: no Accept header: pvt

[Doug]

Does anyone know how to get rid of these warnings?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[Jan 24 18:10:04] WARNING[2629]: chan_sip.c:15898 
handle_request_subscribe: SUBSCRIBE failure: no Accept header: pvt: 
stateid: -1, laststate: 0, dialogver: 0, subscribecont: 
'local-extensions', subscribeuri: ''
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Version: Asterisk 1.4.26.1

Using Polycom phones primarily.

Any ideas?