[Asterisk-Users] Can I tell if it hung up due to busydetect or disconnect supervision?

[Warren Burstein]

The FXO lines on my TDM400 are connected to PSTN lines in Israel.  As far as
I know, the lines around here have disconnect supervision (I've seen some
other Israelis on this list, anyone know for sure?), because it's worked on
Dialogic cards, which reported hangup, not busy detect (while when I connect
a Dialogic card to a PBX, I have to measure the busy signal's
frequency/cadence or it doesn't disconnect).  I couldn't tell for sure - I
don't have a phone with a light, and the only voltmeters I have are digital,
no way to see if there is a drop to zero between the several volts when the
line is offhook to the 47 volts when it is onhook.

But * would only recognize hangup if I unplugged the PSTN line.  Otherwise
it would play my voicemail menu over and over if I hung up without choosing
an extension, good thing I put in a counter and did Hangup after a few
tries.

So, I turned on busydetect, and now disconnect works (I was surprised that
it worked right away, I didn't even need to find out where the busy signal
is defined, maybe the busy here is the same or close enough to the US tone),
but I was wondering, is there any way I can get the console to let me know
whether it disconnected due to voltage drop or busy detection?