asterisk users - Feb 2006 - Polycom IP501 MWI goes off periodically

I remember seeing something like this on the list a while ago, but I'm 
darned if I can find it.

We have a number of Polycom IP501 phones, some of which have more than 
one registration on them. When a voicemail is left for a phone with 
only one registration, the MWI lights up and stays lit until the 
voicemail is listened to.

However, on our phones with more than one registration, the MWI goes 
out periodically, and then relights a short time later with the 
characteristic Polycom warble tone.

Any ideas what could be wrong here? I have a hunch that it has to do 
with registration expiry, but I'm not sure.

Regards,
-- 
Anthony Rodgers
Business Systems Analyst
District of North Vancouver
Web: http://www.dnv.org
RSS Feed: http://www.dnv.org/rss.asp

OK - to partly answer my own question, this looks like it relates to 
how the VM notifications for multiple registrations get sent to the 
phone. It's basically a case of what the most recent message said. The 
notification messages look like this:

First, for the registration with a waiting message:

12 headers, 3 lines
Reliably Transmitting (no NAT) to 172.16.16.102:5060:
NOTIFY sip:2348-Polycom@172.16.16.102:5060 SIP/2.0
Via: SIP/2.0/UDP 172.16.16.12:5060;branch=z9hG4bK78d78c38;rport
From: "asterisk" <sip:asterisk@172.16.16.12>;tag=as06287858
To: <sip:2348-Polycom@172.16.16.102:5060>
Contact: <sip:asterisk@172.16.16.12>
Call-ID: 7329725567a3f0325717ac555cede8f1@172.16.16.12
CSeq: 102 NOTIFY
User-Agent: Asterisk PBX
Max-Forwards: 70
Event: message-summary
Content-Type: application/simple-message-summary
Content-Length: 89

Messages-Waiting: yes
Message-Account: sip:2348@172.16.16.12
Voice-Message: 1/0 (0/0)

Then for the registration with no messages:

12 headers, 3 lines
Reliably Transmitting (no NAT) to 172.16.16.102:5060:
NOTIFY sip:rodgersa@172.16.16.102:5060 SIP/2.0
Via: SIP/2.0/UDP 172.16.16.12:5060;branch=z9hG4bK76c73b57;rport
From: "asterisk" <sip:asterisk@172.16.16.12>;tag=as49fbf0a7
To: <sip:rodgersa@172.16.16.102:5060>
Contact: <sip:asterisk@172.16.16.12>
Call-ID: 32f6dff829af15b47e68125f4c404ba6@172.16.16.12
CSeq: 102 NOTIFY
User-Agent: Asterisk PBX
Max-Forwards: 70
Event: message-summary
Content-Type: application/simple-message-summary
Content-Length: 92

Messages-Waiting: no
Message-Account: sip:asterisk@172.16.16.12
Voice-Message: 0/0 (0/0)

If this one is the last one received, the MWI goes off until the first 
registration expires, when the first NOTIFY is sent again and the MWI 
lights up again.

Notice that I have even set the Message-Account to be different in each 
case, so that doesn't work either.

Does anyone have any further insight before I log this as a bug?

Regards,
-- 
Anthony Rodgers
Business Systems Analyst
District of North Vancouver
Web: http://www.dnv.org
RSS Feed: http://www.dnv.org/rss.asp


On Feb 8, 2006, at 1:47 PM, Anthony Rodgers wrote:
> I remember seeing something like this on the list a while ago, but I'm
> darned if I can find it.
>
> We have a number of Polycom IP501 phones, some of which have more than
> one registration on them. When a voicemail is left for a phone with
> only one registration, the MWI lights up and stays lit until the
> voicemail is listened to.
>
> However, on our phones with more than one registration, the MWI goes
> out periodically, and then relights a short time later with the
> characteristic Polycom warble tone.
>
> Any ideas what could be wrong here? I have a hunch that it has to do
> with registration expiry, but I'm not sure.
>
> Regards,
> -- 
> Anthony Rodgers
> Business Systems Analyst
> District of North Vancouver
> Web: http://www.dnv.org
> RSS Feed: http://www.dnv.org/rss.asp
>
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