[cisco-voip] unable to call a certian number from my system

[Robert Kulagowski]

Wes Sisk wrote:
> You get a bit of a hint here:
> 013986: *Oct 26 16:06:00.632: ISDN Se0/1/1:23 Q931: CALL_PROC pd = 8  
> callref =
> call_proc technically indicates the destination switch has accepted the 
> call and is looking for the next hop destination. This could loosely be 
> interpreted as your CO accepting and properly routing the call.  
> However, the next carrier they hand off to does not route the call.

Is there a good place to learn what the various ISDN messages mean?