[Asterisk-Users] DTMF digits lost on TDM400 card

[Can2002]

I've been having ongoing problems with my TDM400 FXS ports occasionally
not picking up all digits dialled from my analogue handsets.  There
appears to be no set pattern to it, although number 1 seems to be
slightly more frequently missed than other numbers.

I've played around with RX Gain settings and used ztmonitor to arrange
the input signal between 50 and 75% of the maximum value (around -3 to
-5), but it still seems to make little difference.

It's a cordless base station (I have two of them each plugged into a FXS
port) and if I move them to a spare grandstream ATA, it seems to be
consistently fine.

I'm running * 1.2.4 (via AAH 2.5) in case this makes a difference, but
I've been experiencing these issues with every version of Asterisk I've
tried from 1.0.9 upwards.  I'm in the UK, if this makes a difference.

Cheers,
Chris
-- 
  Chris Notley
  chris at notley.org