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Cell phones can't hear ringback

When certain cell phones (Nextel at least) dial into the voice gateway (vg200), they do not hear ringback. It seems to be limited to a few Nextel phones, but what is really going on? Shouldn't the telco send the ringback tone? Why only a few phones?

Thanks

1 REPLY
New Member

Re: Cell phones can't hear ringback

In your voip dial-peer, you may need a "progree indication" command line in order for the VG200 and the PSTN to be in synch with the state of the setup of the call.

This is an example of one of my dial-peers:

dial-peer voice 10 voip

preference 1

incoming called-number .

destination-pattern 8...

progress_ind setup enable 3 <------------------------------------ this

voice-class codec 1

voice-class h323 1

session target ipv4:10.146.124.10

dtmf-relay h245-alphanumeric

fax-relay ecm disable

fax rate disable

ip precedence 5

no vad

Mike Shintani

Cap Gemini Ernst & Young

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