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New Member

No ringback tone when RX <- PROGRESS

Hi, I have a scenario :

ip pnone---ccm---gw---pbx1---pbx2

Using a IP Phone, when i call to pbx1 it works. But if i call to pbx 2 i not ear ringback tone. In the debug isdn q931 only i see a difference in the RX <- PROGRESS. When i receive this param not ear ringback tone.

3 REPLIES
Silver

Re: No ringback tone when RX <- PROGRESS

No Ringback tone issue is commonly caused when the inbound call does not come in to the Cisco gateway/ router with a PI=3. ISDN switches send the PI=3 in the Setup message to inform the gateway that the originating call is non-ISDN and in-band messages are expected.

New Member

Re: No ringback tone when RX <- PROGRESS

Having the same problem. Did you ever find a solution.

Thanks,

Eric

Re: No ringback tone when RX <- PROGRESS

Hi Eric,

Did you try configuring progress_ind alert enable 8 command under the POTS dial peer that matches outbound calls?

Best regards,

- Adrián.

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