I have an issue with my phone 7980 when I try to make a call throught the PRI it is only ring once then busy tone.
My VGW is 2811 and the PRI configuration as below:
no ip address
isdn switch-type primary-net5
isdn incoming-voice voice
isdn bchan-number-order ascending
no cdp enable
And I configure a voice calss codec with G711 and g729 codecs and applied it to the Voip dial peer.
PLZ note that the calls therougt VGW 3825 are working fine.