[Asterisk-Users] Re: Asterisk-Users Digest, Vol 21, Issue 38

[Paul Davidson]

>Date: Thu, 06 Apr 2006 12:47:00 -0700
>From: Jeremy McNamara <jj at nufone.net>
>Subject: Re: [Asterisk-Users] Pickup() h323
>To: Asterisk Users Mailing List - Non-Commercial Discussion
>      <asterisk-users at lists.digium.com>
>Message-ID: <44357034.5090802 at nufone.net>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>Dan Austin wrote:
>
>>Chan_h323 did not work with CCM, and a query/bug report was dismissed,
>>basically stating that Cisco was F'd up and the channel would not be
>>updated to work with it unless funded. (fair, but not helpful)
>>
>>
>
>
>chan_h323 most certainly does work with CCM.   I have customers using it
>all day (and night) long.
>
>
>
>
>Jeremy McNamara

I second Jeremy's comment- but will shim in a few caveats.  chan_h323, which
I personally love, support, and use daily in production and test
environments, absolutely does work with CCM from at least 3.3.3 on through
4.0.1 (and I hear that 4.1 works too, but I haven't personally seen that
one).  HOWEVER- I strongly recommend using the latest versions of Asterisk,
chan_h323, and CCM- and I have one really ugly hack in my Asterisk code
which I haven't submitted because it is definitely a CCM issue (essentially,
729 and 729a negotiation isn't handled properly between the two, causing 729
to be selected in one direction, and 729a to be selected in the other- while
supposedly equivalent, CCM doesn't like it and provides one-way audio as a
result.  My hack chops 729a out of the h323 channel driver entirely, forcing
it to say it's 729 in both directions)  Over the two years I've used
chan_h323 to get to CCM, I've put in quite a few debugging hours- and it
took until the 1.2 release before I was entirely happy with it.  CCM doesn't
seem to have as many version-related changes, but it's definitely quirky.
And I strongly recommend use of a stable gatekeeper- some versions of gnuGK
don't hold up to stress well in this type of use.

I'm happy to discuss how I'm doing it, and work with you to get a stable
configuration.

-pbd
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