Controlling Multiple PRI T-1's with 1 d Channel

[jj94533]

We are connecting a Redcom IGX to three Cisco 3745 routers (12.4(7g) ios) with 13 T-1's using MGCP and a Call manager running 4.1. We just converted to PRI using 4ESS between the two. The redcom has a way to control (span) up to 5 T-1's using one D Channel, is it possible to control (span) multiple T-1's using one D Channel on the call manager?

[teodorgeorgiev]

Hi,

as far as I know, this is not possible.

Protocols like NFAS, R2 and QSIG can not be used on MGCP controlled gateways.

[Rob Huffman]

Hi Justin,

Teodor is correct here (nice one T!) NFAS is only currently supported with h.323 not MGCP.

Here is a Cisco note indicating this as well as a couple of config docs;

From Esteban @ Cisco;

http://www.ciscotaccc.com/kaidara-advisor/voice/showcase?case=K10070486

From Milan;

http://www.cisco.com/warp/public/793/access_dial/quadt1_nfas.html

From Chris;

http://www.cisco.com/warp/public/793/access_dial/quadt1_nfas.html

Hope this helps!

Rob