[asterisk-users] TDM 400P in the UK - doesn't see ringing calls hanging up before answer

[Stephen Bosch]

Ed W wrote:
> Using a TDM400P in the UK nearly works fine, but I have a last remaining
> problem in that if the incoming is ringing and then the caller hangs up,
> asterisk takes another couple of rings before it spots the hangup.
> 
> This is annoying in that I sometimes get phantom calls late at night
> (possibly due to call waiting or the exchange doing a half ring to see
> if we are live).  Also I get phantom calls on either the voicemail or
> when I answer there is just dial-tone because the caller hungup before
> the call was answered
> 
> I have fiddled with a number of settings relating to polarity reversal
> because I believe that might be relevant to BT's implementation, but
> it's not made any difference from the default config.
> Any suggestions on how to fix this from UK users?  I have tried most of
> the suggestions in the voip wiki to no effect (haven't tried calling BT
> and asking them to change any settings yet)

Did you end up calling BT?

I'm curious.

-Stephen-