On Tue, Feb 4, 2014 at 10:56 AM, Olivier <[email protected]> wrote: > Hello, > > On a Asterisk 1.6.1 powered system, I've just discovered that using > Busy() application in dialplan was no enough to send a Busy signal on > incoming Dahdi channel. > > On this specific install, adding an Answer()) and a Playtone() statement > in dialplan triggered sending of busy tone but I'm still surprised by my > findings. > > Should I expect public switch to send a Busy tone to caller whenever > Asterisk triggers Busy app or did I miss something ? >
It depends upon what kind of DAHDI channel. If it is an analog FXS/FXO port then you have to answer for the busy tone to be heard by the caller because as far as the telco is concerned it delivered a call to a non-busy line. If it is an ISDN channel then it depends upon what you have the priindication option set to. With priindication=outofband then a busy cause code is sent to the network and the call is hung up. With priindication=inband then a busy tone is sent after a possible PROGRESS message. Richard
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