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

[Mike Taylor]

Good point, thanks,

But, RFC2833 I've found to be unreliable, broken, patchy, scratchyŠ.

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)Š

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 tonesŠ
> 
> 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 DTMFŠ
> 
> 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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