Dial status question

When making sip or iax2 calls yesterday I noticed that all calls from the manager interface to a busy number exited with dial status = busy.
However today, the same busy number, the same voip providers, I see dial status = cancel.
I tried all 3 of my voip providers and got the same response.

Is there some variability in what the local teleco will give in response to a busy phone number? Clearly asterisk can detect busy dial status.

asterisk 1.2.24

Hi

The simple answer is no, a Busy call should be busy a eqipmnent busy call should be congestion. it may be your carriers are routing calls differently depending on time of day hence th e diffeent reasons

Ian

Hi

One thought is on the IAX calls see what he iax cause code is, you may need iax debug on. as this is far more accurate as it uses ISDN cause codes.

Ian

thanks again.
I'll see if there is a pattern.