I've got CME 3.3 up and running with some SCCP phones. I've also got
a AT&T CallVantage TA. The one I have does MGCP. They have another
that does SIP. I am currently connect the TA to CME via an analog FXS
to FXO connection. Yuck, but it works.

1. The MGCP seems like pretty standard MGCP/SDP/RTP/RTCP which only
know a little about. The TA does have a funky authentication sequence
when it first boots up. Assuming I can port map or hack my way around
the authentication sequence and send the MGCP/SDP/RTP/RTCP packets to
my CME router, will it be able to accept the MGCP call? If so I
assume I will I be able to use a dial-peer to get it to a cisco phone
running SCCP? The MGCP commands seem to be in the version of IOS I'm
using which is IOS 12.3(14)T3 image c3640-is-mz.123-14.T3.bin.

2. Same question for SIP?

3. The closest MGCP config example I can find that looks promising in
the "How to Configure Network Access Server Package for Media Gateway
Control Protocol" seems to be "Cisco 2600 Series as a Residential
Gateway Example -- This example shows a cisco 2620 router being
configured as an analog residential gateway". That manual page 45,
pdf page 61.
http://www.cisco.com/application/pd...a008020bd2c.pdf

Is that example on the right path?

4. Does anyone know what hardware AT&T (now SBC) is using on the
other end? Are the cisco routers? Any telltales?

5. Has anyone else tried this?

Best,

leb

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