[Asterisk-Users] Incoming voicemail and dialtone

[Scott Laird]

I have a problem with voicemail recording dialtone on hangups.  From 
time to time, callers hang up without leaving a massage, so Asterisk 
records around 100 seconds worth of dialtone instead.  I've seen this 
off and on for almost 9 months now, it's currently happening with 1.0.2 
on Linux 2.6.9.  My Asterisk box has a X100P connected to Verizon and 
IAX service through NuFone.

I have call-forward-on-busy enabled on my Verizon line, forwarding 
calls to a NuFone 800-number.  Verizon also triggers the forwarding 
after around 20 seconds of ringing without an answer.  Quite 
frequently, Asterisk will send the POTS call to VM at the same time 
that Verizon is forwarding it to NuFone; when this happens, I usually 
end up with a voicemail message full of dialtone.

I see that this was discussed in 2003, with a few suggested code fixes, 
but I don't see anything obvious on the list since then.  Does anyone 
have any suggestions?


Scott