[asterisk-dev] Developing VM App for Astrisk running on Linksys SPA400

[Philipp Kempgen]

Steve Wofford schrieb:

> Linksys/Cisco has not produced any API or documentation
> on how to subscribe for VM notification or how to retrieve them. I have
> full use of a complete SIP stack so it is a matter of sending the
> correct SIP messages to the SPA400 and processing the SIP messages.

> I figure I am going to have to reverse engineer this, but since Asterisk
> is open-source, should not be too hard, but need some guidance.

Maybe they use the method from RFC 3842
(Message Summary and MWI Event Package)
http://tools.ietf.org/html/rfc3842

For examples in Asterisk see chan_sip.c.
MWI_NOTIFICATION, application/simple-message-summary, ...


   Philipp Kempgen

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