Hello, I have the "no ringback tone" problem when I call from a SIP softphone (Linphone) to the PSTN (through a cisco 5300 with PRI connection to telco).

Linphone --> SER --> c5300 --> POTS

My conf on c5300:- ! dial-peer voice 1001 pots destination-pattern 210....... no digit-strip port 0:D !

I used also the following commands on pots dial-peer with no success. progress_ind setup enable 3 progress_ind connect enable 8

any ideas ? thank you, Kostas