[Asterisk-Users] Asterisk/Cisco Call Manager 3.3

[Greg Oliver]

I would have to agree - your easiest route is to upgrade to CCM 4.0+
with SIP trunk support..  

On Fri, 2005-10-14 at 16:55 -0500, Paul Davidson wrote:
>         
>         Message: 13
>         Date: Fri, 14 Oct 2005 09:58:37 -0500 (CDT)
>         From: <gorand at dvvti.com>
>         Subject: [Asterisk-Users] Asterisk/Cisco Call Manager 3.3
>         To: <asterisk-users at lists.digium.com>
>         Message-ID:
>         <4408.69.215.189.2.1129301917.squirrel at www.dvvti.com>
>         Content-Type: text/plain; charset=iso-8859-1
>         
>         I need to pick all the Asterisk and Cisco People a little.
>         
>         My company has a Cisco Call Manager 3.3, configured via h323
>         gateways. I 
>         have remote users that I want to place a SIP Server on the
>         external WAN
>         and be able to connect their phones to the system and be able
>         to get calls
>         and call people in the office going through the Cisco Call
>         Manager and the 
>         h323 router. My only problem is that Cisco Call Manager 3.3
>         does not
>         support sip trunking. Is there anyway this can be done.
>         
>         Please shed some light on this topic.
>         
>         Thanks.
>         
>         Goran
>         
> Goran-
> 
> Speaking from experience, you have a tough road ahead of you.  The
> only way to accomplish this is via h.323 trunks under Cisco and
> Asterisk.  There are a few known good configurations- I can really
> only speak to one, as it eventually worked for me- but others may have
> different and perfectly reasonable advice.
> 
> First, some prerequisites:
> 1. Asterisk 1.2 or CVS HEAD.  Do NOT try this with any of the 1.0X
> series- you will be able to call from CCM to Asterisk, but not from
> Asterisk to CCM.
> 2. An H323 Gatekeeper.  GnuGK works, but does occasionally bonk out.
> CCM will send RRQ requests to the gatekeeper at a rate of 10x per
> second, and eventually, GnuGK loses it.  An IOS gatekeeper seems to be
> much better.
> 3. chan_h323 set up and running properly.  There's whole readme files
> on the prerequisites for this- read them, follow the directions
> closely- and call on JerJer *LAST* if you value your life.
> 4. A Gatekeeper controlled Trunk on CCM.  The tricky bits here are the
> significant digits, and the technology prefix.  CCM does *NOT*
> register the tech prefix or it's extensions with the gatekeeper- so
> you'll have to config the gatekeeper to know where to send the call,
> and you'll have to configure your CCM dialplan to act accordingly.
> 
> Set this up slowly.  Get a working Asterisk box that's able to handle
> softphones or hardphones as an island PBX, then configure the H323
> trunk- you'll save some frustration of trying to configure both
> simultaneously.
> 
> Find me on the IRC channel if you need specific questions answered- or
> email me directly.  I can optionally configure it for you for a fee-
> I'm based in the US, and judging from your accent, I'd say you aren't-
> I can do this remotely if needed.  I won't charge you for questions
> answered. :)
> 
> -pbd
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