[asterisk-users] DAHDI DTMF problem?

[Tim Nelson]

----- Original Message -----
> I have an Asterisk server configured to run as voicemail with a T1
> and SMDI.
> It has 1.6.1.6 (dahdi 2.1.0.4) and Centos 5.6 and has worked great
> for a few
> years. I am configuring a new server with Asterisk 1.8.13 (dahdi
> 2.6.1) on
> Centos 5.8
> 
> The problem I am having appears to be related to DTMF detection. When
> the
> test phone number is called (2704083000) Asterisk only receives a
> portion of
> the dialed number. It varies as to what numbers are detected.
> Sometimes it
> sees a single digit, sometimes 3 or 4 of the digits of the dialed
> number.
> 
> When I compare this to the old server the debug below is similar but
> there
> isn't any mention of the "sig_analog.c" lines shown below.
> 
> I am told the T1's on the old server and the new server are
> configured the
> same. I can make outgoing calls on the T1 from Asterisk.
> 
> Can someone give me a clue as to what could be causing this?
> 

What kind of hardware are you using to interface with the T1? Is there any chance a HWEC or other DSP is interfering with DTMF?

--Tim