I’m about to deploy Polycom SoundPoint 335 phones in to a call center. This phone does not have a dedicated DND button like other Polycoms models do. On those if one wants to disable DND all that is required is to map the key to something else in sip.cfg.
On this model the approach seems to be to enable DND as a server side feature. The phone them seems to pass information back up to Asterisk. With that enabled Asterisk (1.4.25 in this case) appears to get flooded with these as-feature-event SUBSCRIBE dialogues which it does not know how to handle.
SUBSCRIBE sip:0004F22FB652@10.0.3.214:5060 SIP/2.0
Via: SIP/2.0/UDP 10.0.3.60;branch=z9hG4bK5a0ba5cf6C4D26C6
From: “Lab x4502” sip:0004F22FB652@10.0.3.214;tag=C12F3C2E-D6A9051D
CSeq: 2 SUBSCRIBE
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER
Authorization: Digest username=“0004F22FB652”, realm=“lab”, nonce=“41aa0e8e”, uri=“sip:0004F22FB652@10.0.3.214:5060”, response=“bcaca3e1c143a351f73213a4800de2a2”, algorithm=MD5
Is this feature supported in more recent versions of Asterisk?
Anyone know another method to disable DND on a IP335 other than to toss it in to server mode and bombard Asterisk?