[Asterisk-Users] Cisco Call Manager and H323 trunk correction (MTP)

[Dan Austin]

I posted a couple weeks back about our experiences with H323 trunks on
CCM.
As of version 4.0, the Cisco documents state that a 3rd party H323
gateway
requires a Media Termination Point..

At the time I said that I have Asterisk working with the ooH323c version
of
chan_h323 with out an MTP.  I just found that another engineer had been
twiddling with the CCM config, and we were using a MTP.

I retested chan_h323 without the MTP, and indeed per the Cisco docs,
when a phone connected to CCM puts a call placed through chan_h323 on
hold, the call is disconnected.  This IS NOT a bug with asterisk or the
chan_h323, but a known Cisco quirk.

Cisco's own H323 gateways are capable of dynamically creating/connecting
to a MTP.  Which permits calls to/through them to allow rtp re-invites
and
still preserve a call during media transitions.

I thought I should post this for the archives in case anyone searching
for
details about connecting CCM to Asterisk found my earlier
misinformation.

Dan
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