[Asterisk-Dev] PROGRESS messages with Cause 17 (User Busy) - Bug #4250

[Klaus Darilion]

Paul Cadach wrote:
> Hello,
> 
> Clint Guillot wrote:
> [skipped]
> 
>>Is it a violation of Q.931 for a PROGRESS message to contain a cause 
>>code 17 (User busy), AND for this to be the only indication that a call 
>>has failed with a busy condition?
>>Is a HANGUP message not required in this instance?
> 
> 
> Try to enable call progress detection to have workaround for this situation.

Does progress detection also work on PRIs?

klaus