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Community Member

VoIP over ISDN

We are in a situation of realizing a back-up ISDN based solution for primary data links transporting also VoIP. The architecture is HUB and Spoke like so all distant sites are calling the central one.

Anyone realized that configuration before? We are encountering problems in determining the central router to interleave VoIP packets on Dialer interfaces with MPP using dialer profiles.

Thanks in advance

Cisco Employee

Re: VoIP over ISDN

You can configure QoS for VoIP over isdn lines..Here is the url which discuss "Designing and Deploying VoIP over ISDN" with QoS too.

Community Member

Re: VoIP over ISDN

Thanks a lot!

Excellent document!

I just found I hit CSCdw82424.

That is why I was not able (always...) to make the LFI working on Dialer interface.

Issue solved.

Cisco Employee

Re: VoIP over ISDN

There you go..I was about to mention that to you but i can't unless i see the debugs which verify that. Just run the ios which has fix for CSCdw82424

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