T1 CAS and MGCP. Anything other than E&M?

[jaywydra]

Is it possible to to anything other than E&M on a T1 CAS port plugged into a 3845 MGCP gateway? CCM is 4.2(3). I need to talk to a legacy IVR via loop-start. The only option I'm given on the CCM gateway config page is E&M.

Regards,

Jason

[gogasca]

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_chapter09186a00801ec5cc.html#37839

With MGCP we only support T1 CAS using E&M wink start or delay dial.

You need to change to H323

[jaywydra]

Thanks. So if I can only do loop-start with T1-CAS when using H323 then how can I use the hookflash feature? As far as I can tell hookflash is not supposrted on T1-CAS while using H323.

Thanks,

Jason

[gogasca]

E&M is a signaling type listed under T1 CAS. Anything that can run T1 CAS MGCP should be

able to use hookflash. If it is an H323 gateway it will use hookflash relay. So

everything in that list that is MGCP and T1 CAS supports hookflash. The only exception

would be the Catalyst 4000 and 6000. It must use E&M.

http://www.cisco.com/en/US/customer/tech/tk1077/technologies_configuration_example09186a008009431b.shtml

For hookflash to work in the IOS, h450 call transfer script:

app-h450-transfer.2.0.0.1.zip is needed and the script can be downloaded

from CCO:

http://www.cisco.com/cgi-bin/tablebuild.pl/ip-iostsp

Cisco CallManager 4.2.1 and upper supports hookflash transfer on the T1 CAS ports of all Media Gateway Control Protocol (MGCP) gateways (both IOS and non-IOS gateways).

The only exception would be the Catalyst 4000 and 6000. It must use E&M.