is it possible to send the ISDN Alerting message in front of the ISDN Connect message with a PRI voice-port when a port is used for a two-stage-dialing? I mean some configuration like the "ring number" with FXO voice interfaces.
I have an issue with some PBX that requires to first receive the Alerting and just then the Connect message.
no ip address
isdn switch-type primary-qsig
isdn incoming-voice voice
no cdp enable