[cisco-voip] MGCP and SIP with CCE

[Lawrence E. Bakst]

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/pdf/en/us/guest/products/ps5761/c2001/ccmigration_09186a008020bd2c.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