MWI SUBSCRIBE Settings

Hello list members,

We’re trying to get MWI notifications on our ATA device and we set it to
send SUBSCRIBE messages to Asterisk, but it gets UNAUTHORIZED messages,
despite the fact that we set the following lines in its settings in
sip.conf:

subscribemwi=yes
mailbox=21@from-extensions

We need help in understanding how this works and what we are doing wrong.

This is the SIP debug we get:

<--- SIP read from UDP:10.0.0.4:5090 --->
SUBSCRIBE sip:21@10.0.0.10 SIP/2.0
Via: SIP/2.0/UDP 10.0.0.4:5090;rport;branch=z9hG4bK3663664e35
From: ;tag=6d8c6ac6
To:
Call-ID: href=”mailto:055f7edd4081e1ec0f176e0a4b395a43@10.0.0.4″>055f7edd4081e1ec0f176e0a4b395a43@10.0.0.4
Contact:
CSeq: 1 SUBSCRIBE
Max-Forwards: 70
Expires: 60
Accept: application/simple-message-summary
Event: message-summary
User-Agent: CM5K-TA2S (810170)
Content-Length: 0

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