Hi, we already have the MWI protocol to notify the number of read and unread
messages to a subscriber, but AFAIK there is not a integrated protocol to
manage the voicemail remotely (via SIP).
All the solutions I've seen are based on a voice IVR ("press 1 to listen the
message, press 2 to delete it...").
There are also web pages accessing to the voice messages and showing info and
actions for them.
But I really expect the existence of a real protocol for this task.
Advantages:
- A user could browse him voice messages via the screen and buttons of him
deskphone (instead of calling an extension to manage them via poor DTMF).
- The phone could show a detailed list of stored messages by showing the
origin, date... (MWI just shows the number or read and unread messages).
Not sure how could be the SIP specification for this, perhaps something as the
following:
- A more complete MWI notification specification, showing more data about
messages. This would envolve the typicall SUBSCRIBE/NOTIFY mechanism.
- A SIP method type to request Actions in the server. It could be an already
existing method (INFO?, MESSAGE?) or maybe a new one (ACTION?). For example:
ACTION sip:[EMAIL PROTECTED] SIP/2.0
From: <[EMAIL PROTECTED]>;tag=qweqweqwe
Class: vmm <-- Voice Mail Management
Content-Type: application/vmm-action.xml
<?xml version="1.0" encoding="UTF-8"?>
<vmmAction xmlns="urn:ietf:params:xml:ns:vmm-action">
<action>delete</action>
<param>new/1</param>
</vmmAction>
- Also, when the user browses the voice messages list in him phone and press
the buttom "Listen" over one of them, an INVITE could be generated (the
voicemail URI must be previously configured of course):
INVITE sip:[EMAIL PROTECTED];message=new/1 SIP/2.0
Is it feasible? does it already exist something like this (probably better
xD)?
Thanks a lot.
--
Iñaki Baz Castillo
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