[Asterisk-Users] Sangoma A104D is dropping DTMF digits during IVR

[whois wes]

We had a similar issue pop up last week with our A104D's, and we ended
up putting the older TE410P's back in as a workaround.

We are running Asterisk 1.2.4, Zaptel 1.2.5, and the wanpipe 2.3.4
beta drivers.  only three of the 8 servers we have in production were
affected, and we are nearing our conversion to PRI, which leads me to
believe it might be something with the telco.

There is a DTMF debug utility for the A104D - you might try that and
see what happens.

http://wiki.sangoma.com/wanpipe-linux-asterisk-debugging#a104d_echo_debug

I'd be interested in hearing what you end up with, and will try to let
you know should anything develop on our end.

wes


On 6/29/06, Jay Dutt <jdutt at softelinc.com> wrote:
> I have the following pbx setup: asterisk 1.2.9.1, IVR setup, Sangoma
> A104D PRI card with HW echo cancel, hw dtmf detect. When calling inbound
> (from a cell phone or wired home phone) I can get the pbx to recognize
> the digits I type in for my extensions 100% of the time. However, when
> dialing inbound from a cordless home phone, the pbx drops the first
> digit or the first two digits (eg. I dial "1201" but the asterisk
> monitor indicates that only "201" or "01" gets detected). This is more
> acute when the Background voice has speech going (not pausing) but less
> so when the Background voice has pauses (ie. if I dial digits at the
> pause at the end of the Backround voice's sentence, I have a better
> chance of getting my digits recognized). Outbound digits seem to be
> recognized (when inside operators dial to external IVR systems). Dial
> plan is pretty standard, starts like this:
>
> exten => 6100,1,Answer
> exten => 6100,2,Wait(1)
> exten => 6100,3,Background(mainmenu)
> exten => 6100,4,WaitExten(${WAITEXTEN_TIME})
> ... etc
>
> On zapata.conf, current rxgain/txgain settings are 0.0. I've messed with
> many combinations of gain parameters both positive and negative. I had
> better results when I had positive rxgain value of 16 and negative
> txgain value of -8. But my customer reported dropped calls, so I quickly
> set back to 0.0/0.0.
> Per Sangoma tech support recommmendation, I also turned OFF the HW echo
> canceller in the wanpipe congig files. This had no effect. I am on
> latest Sangoma beta4-2.3.4, btw.
>
> Has anyone usnig Sangoma A104D experienced this issue, and is there a
> way to get rid of it? If I cannot find the proper solution, I will
> likely swap out and try new Digium TE212P as replacement. I have
> reported to Sangoma that this is occurring on another pbx installation
> as well with the same card.
>
>
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