<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>Message: 13<br>Date: Fri, 14 Oct 2005 09:58:37 -0500 (CDT)<br>From: <<a href="mailto:gorand@dvvti.com">
gorand@dvvti.com</a>><br>Subject: [Asterisk-Users] Asterisk/Cisco Call Manager 3.3<br>To: <<a href="mailto:asterisk-users@lists.digium.com">asterisk-users@lists.digium.com</a>><br>Message-ID: <<a href="mailto:4408.69.215.189.2.1129301917.squirrel@www.dvvti.com">
4408.69.215.189.2.1129301917.squirrel@www.dvvti.com</a>><br>Content-Type: text/plain; charset=iso-8859-1<br><br>I need to pick all the Asterisk and Cisco People a little.<br><br>My company has a Cisco Call Manager 3.3, configured via h323 gateways. I
<br>have remote users that I want to place a SIP Server on the external WAN<br>and be able to connect their phones to the system and be able to get calls<br>and call people in the office going through the Cisco Call Manager and the
<br>h323 router. My only problem is that Cisco Call Manager 3.3 does not<br>support sip trunking. Is there anyway this can be done.<br><br>Please shed some light on this topic.<br><br>Thanks.<br><br>Goran<br><br></blockquote>
</div>Goran-<br>
<br>
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.<br>
<br>
First, some prerequisites:<br>
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.<br>
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.<br>
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.<br>
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.<br>
<br>
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.<br>
<br>
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. :)<br>
<br>
-pbd<br>