Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Attention: The Community will be in read-only mode on 12/14/2017 from 12:00 am pacific to 11:30 am.

During this time you will only be able to see content. Other interactions such as posting, replying to questions, or marking content as helpful will be disabled for few hours.

We apologize for the inconvenience while we perform important updates to the Community.

New Member

PRI Question

We currently have an LD PRI from AT&T off a primary-4ess switch with the Megacom service (AT&T toll free service). The megacom service is specifically defined under the D channel serial interface (isdn nsf-service megacom). All is well.

AT&T has informed us that they are re-homing our PRI onto a primary 5-ess switch. The concern is that the ISDN nsf-service megacom is not an option once we change our switch type to primary 5-ess. I have a call into telco but hoping that somebody here can offer some guidance.

Is there something else on our side that we need to configure (aside from changing switch type from primary-4ess to 5-ess? I know that on the primary 4-ess without the nsf-service megacom specifically defined we were unable to make calls and got Facility Element missing during isdn q931 debug.

Our setup is UCM 6.1 and Cisco voice gateway using h323.

I know under route pattern you can specifically define services, but the Megacom there is also only available when the switch type is primary-4ess.


New Member

Re: PRI Question

Any help???

CreatePlease to create content