[Asterisk-Users] DTMF Digits

[Brian J. Schrock]

Hello

The option relaxdtmf=yes improved the accuracy of received DTMF digits 
on cell phones but did not make DTMF detection 100%. Increasing the 
rxgain to 15 does improve the accuracy almost to 100%, as long as you 
let the first few milliseconds of the recording play. The problem now 
is that once a call finds it's way to my handset the received audio is 
distorted and too loud to carry on a conversation without some 
discomfort to the listener. I have tried setting the rxgain to a 
negative db setting for my S100U and that does not seem to have any 
affect on how loud the signal is (if it worked it still wouldn't do 
anything for the distortion though). Is this information helpful to 
anyone? Is there a way I can get more information that would be helpful 
to someone who can code a solution?

[channels]

txgain=0
rxgain=15.0
context = default
language = en
callwaiting = yes
callwaitingcallerid = no
threewaycalling = yes
transfer = yes
cancelforward = yes
callreturn = no
usecallerid = yes
hidecallerid = no
echocancel = yes
echocancelwhenbridged = yes
immediate = yes

relaxdtmf=yes
group = 1
;use with FXO PCI card
signalling = fxs_ks
channel => 1-3

echocancel = yes
echocancelwhenbridged = yes
context = local
immediate = no
group = 2
txgain=15.0
rxgain=-6.0
;use with FXS USB card
signalling = fxo_ks
callerid = "Brian Schrock" <(614) 798-9106>
mailbox=2244,2245,2246
channel => 4

On Wednesday, March 12, 2003, at 03:46 PM, James Hines wrote:

> On Wed, 2003-03-12 at 14:32, Martin Pycko wrote:
>> You may try to add
>> relaxdtmf=yes
>> just before channel => 4 in zapata.conf
>
>
> Thanks! This has solved the problem for the test phone! I will try my
> cell phone from home tonight, but I suspect the problem has been 
> solved.
> Just out of curiosity, is the relaxed mode looser than the DTMF spec or
> is it just the outside limits of the spec, and the normal mode is more
> restrictive than the DTMF spec?
>
> jwsh
>
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>
Brian J. Schrock
Network Engineer, RHCE, CCNA
Anistone Technologies
Phone: 614-798-9106
FAX: 614-573-7165
6926 Avery Rd.
Dublin, OH 43017