[Asterisk-Users] Cisco Callmanager & Asterisk for Voicemail revisited

[Guillermo Salas M]

El lun, 19-09-2005 a las 14:28 +1000, Shaun Ewing escribió:
> Some of you may remember back in May the thread on using Asterisk as a
> voicemail server for a Cisco Callmanager system.
> 

I'm looking for the same feature, please let me know where can I find
more resources and info about it.

Thank you very much.

> My own Callmanager system is integrated into an Asterisk server for
> voicemail (and other things). Back in May I was using H323 for
> integration, but since I've upgraded to CCM 4.1 I have switched over
> to SIP.
> 
> The integration with H323 required using Call forwarding to send the
> call to an extension on Asterisk. For example, extension 7443 would
> forward to 27443 on Asterisk which looked something like:
> exten => _27XXX,1,Voicemail(u${EXTEN:1})
> 
> Obviously setting this for each and every phone on Callmanager was not
> an option for any wide deployments, and Paul Davidson investigated
> some of the other options. Paul discovered that it was possible to
> setup a voicemail pilot, tick the voicemail box, etc. but you would
> lose the ability to have the caller ID information added to the
> voicemail.
> 
> This wasn't an option for us, as caller ID is quite important.
> 
> Up until now, I have continued with the custom extension option,
> setting up the appropriate call forwarding when new phones were added
> to the system. The trunk between CCM and Asterisk changed to SIP after
> the CCM upgrade, but everything else stayed the same until I revisited
> this today.
> 
> To summarise what I have accomplished:
> 
> Full voicemail integration between CCM and Asterisk with the following features:
> - MWI
> - Voicemail on the CCM side is enabled by selecting Forward to
> 'Voicemail' rather than yucky custom extensions. Allows for wide
> deployment.
> - Messages are accessed by pressing the 'Messages' button on the CCM
> phones, or dialing the VM pilot number.
> - If a CCM user doesn't want to take a call, they can press the
> iDivert softkey to send to voicemail immediately.
> - CCM users can forward all calls to voicemail in the ccmuser pages,
> or by pressing CFwdAll and entering the pilot number or messages.
> - All the standard Asterisk voicemail features work just fine, eg: vm to email.
> - more
> 
> Bugs with the setup:
> - If there's a SIP device registered with the Asterisk machine
> handling the voicemail, and the call path is something like: Sip
> Device -> Asterisk -> CCM. If the call subsequently reaches voicemail,
> Asterisk prompts for proxy authentication and CCM drops the call. This
> problem can be avoided by using usernames that don't match the caller
> id, eg: [sip7345], or having a machine dedicated to Voicemail.
> - That's all I've found
> 
> These options have been tested with Asterisk 1.0.8 and CCM 4.1(2)sr1.
> If this is something that people would be interested (and you made it
> this far), I'd be quite happy to whip up some instructions and add it
> to the wiki.
> 
> -Shaun
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-- 
Guillermo Salas M.
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