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

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

CFA and ISDN channel usage

Hi,

If an external caller was redirected (CFA) at another external user, how many ISDN channels are needed?

And what happen if voice gateway uses MGCP and CM went down? Assuming no SRST as well.

Thanks,

1 REPLY
Cisco Employee

Re: CFA and ISDN channel usage

2 channels, one for the incoming call and one for the outgoing call

call should stay up because of call preservation, SRST is used for phones after failover and to make new calls so it's really out of the picture at that point.

HTH

javalenc

if this helps, please rate

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
126
Views
5
Helpful
1
Replies