[asterisk-dev] SIP ghost calls

[Hans Petter Selasky]

Hi,

I'm playing around with a new SIP phone connected to Asterisk 1.2.13. I am 
performing some tests, and one of them is the "cable unplug" test.

During a call I unplugged the ethernet cable, and to my surprise, the call was 
not disconnected. Even after 20 minutes. This is very bad!

Can anyone explain why Asterisk does not ping the SIP phone regularly, and if 
there is no reply, disconnect all associated calls?

Just imagine what happens if two persons call eachother, using SIP phones over 
the PSTN network, and both disconnect their phones. Who is going to pay for 
the ghost call, which might last forever?

--HPS