[asterisk-users] Asterisk hangs up after 10-15 minutes when SIP Phone is on mute

Mike list at virtutel.ca
Thu Sep 7 08:31:56 MST 2006

I have a Polycom 501 connected to Asterisk 1.2.4 (and then connected to a
VOIP provider, Unlimitel in my case).  My job requires me to attend
conference calls regularly, and I am usually there as a silent listener.
Therefore, I mute my phone.
I`ve noticed that if I mute my phone, after 10-15 of being muted, the line
hangs up.  I had the same problem with my GXP-2000 before, so I dismissed
the phone as being the problem.  If I unmute regularly (or the entire time),
the line doesnt hang up (until it reaches max timeout of course, which is
much more than 15 minutes).  So the problem is my phone is muted. I have
observed that about 6 times (out of 6 tries) in the last 4 months.  It`s a
reccuring issue for sure.
What I am left with is Asterisk (or my VoIP provider) as the issue.  Since I
only have control on my own Asterisk server, I thought I should start there.
What setting could cause this? I have a fairly fancy dialplan, but I havent
changed anything else than the diaplan.  All system-wide Asterisk settings
are default as far as I know.
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