[SIPForum-discussion] What is MWI

[Vikas Singhal]

Hi,

There are 2 types of MWI : Solicited and Unsolicited.

Solicited means Subscribe/200 then Notify/200.

Unsolicited means only Notify/200. No need to Subscribe.


VMWI : Visual Message Waiting Indicator. LED on phone will be on/off as per "message-summary" Event "Message-Waiting" header in Notify is "yes/no".

MWI: Stutter tone will be heard when phone will be picked. This tone will be on/off as per "message-summary" Event "Message-Waiting" header in Notify is "yes/no".

Regards,
Vikas


Message: 5

Date: Wed, 6 Feb 2013 10:53:28 +0100 (CET)
From: "Henning Christiansen" <hc at stollmann.de>
Subject: [SIPForum-discussion] WG:  What is MWI ?
To: <discussion at sipforum.org>
Message-ID: <bc5290a1.00000df0.00000028 at HCH-WXP.stollmann.net>
Content-Type: text/plain; charset="us-ascii"

In SIP, MWI is typically implemented using "event Notifications" according
to RFC 3265.



To receive MWI notifications you send out a SUBSCRIBE request with
"message summary" request, and you will hopefully receive a NOTIFY
whenever a new message is available in your voice box. You can then call
this voice box and listen to the recording, delete the message (probably
leading to a new NOTY), etc.



This specific application for SUBSCRIBE/NOTIFY is described in RFC 3842.



Von: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] Im Auftrag von Khoa Pham
Gesendet: Samstag, 2. Februar 2013 06:25
An: discussion at sipforum.org
Betreff: [SIPForum-discussion] What is MWI ?



Hi all,



I search google for WMI, and know that 



"A message-waiting indicator (MWI) in telephony is a feature that
illuminates an LED on select telephones to notify a telephone user of
waiting voicemail messages on most North American public telephone
networks and PBXs."



What is MWI used in SIP ?



-- 
Khoa Pham
HCMC University of Science
Faculty of Information Technology

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