[Freeswitch-users] FS - DTMF and Cisco CME/UCE

[Yehavi Bourvine]

Hello,

  I had for a long time a Cisco SIP-E1(with Q.sig) gateway which caused me
much grief with DTMF; it works partially OK with INFO but not with RFC-2833.
I filed a support call with Cisco, as its debug shows that it receives and
detects the RFC2833 but nothing is sent to the E1 side.

The last conslusion of Cisco's support is that I have to enable transcoding
but they coouldn't find how to enable it in my configuration. I now have an
Audioodes Mediant-1000 on loan which does RFC-2833 without any problems...

The only problem I've found so far with the AudioCodes is name passing via
E1/Q.sig at the ringing phase (we use it to connect our Freeswitch to our
Nortel PbX).

                        Regards, __Yehavi:



2011/5/24 Mike Taylor <mtaylor at employees.org>

> Good point, thanks,
>
> But, RFC2833 I've found to be unreliable, broken, patchy, scratchy….
>
> I've got it set to RFC2833 now, and it just ain't working.
>
> Will get more traces, trial and error until I stumble across a good combo,
> or bug(s)…
>
> Thanks again,
> Mike
>
> From: Ognjen Seslija <oseslija at gmail.com>
> Reply-To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> Date: Mon, 23 May 2011 20:46:09 +0200
> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> Subject: Re: [Freeswitch-users] FS - DTMF and Cisco CME/UCE
>
> Why use INFO when it's only method I know Cisco won't speak (2833, kpml,
> sub/notify)?
>
> Here's the CME snippet for FS trunk I have. FS sends 2833 tones to CME btw.
>
> dial-peer voice 100 voip
>  description ** TO FS **
>  destination-pattern .T
>  b2bua
>  session protocol sipv2
>  session target sip-server
>  session transport udp
>  dtmf-relay rtp-nte
>  codec g711alaw
>  no vad
>
>
>
>
> On Mon, May 23, 2011 at 4:07 AM, Mike Taylor <mtaylor at employees.org>wrote:
>
>> Hi,
>>
>> This is driving me nuts.
>> I have a Cisco CME (a few actually) where I cannot get DTMF to work.
>>
>> Does someone happen to have the magic recipe of SIP/Dialplan profiles and
>> Cisco config to make DTMF <relay> work?
>>
>> I spent several very very painful days trying to get RFC2833 to work,
>> using FS to try and generate the tones itself. I ended up with all sorts of
>> codec mismatches, delay,distortion and some really mangled DTMF tones…
>>
>> So, now I'm back to;
>>
>> PSTN----CiscoGW----<external>----FS----<internal>----<CUST PABX>---Phone
>>
>> Where <CUST PABX> is 3 CMEs that won't talk DTMF
>> 30+ other vendor's gateway's that WILL do DTMF…
>>
>> Context External and internal are both set to dtmf-type info (or dtmf_type
>> info)
>>
>> DTMF works FROM the Cisco GW towards our network, doesn't
>>
>>
>> So, does anyone have a magic solution?
>>  Because Cisco TAC say they see DTMF being sent (as rtp-nte), when I need
>> INFO or in-band.
>>
>>
>>
>> Thanks,
>> Mike
>>
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