[Freeswitch-users] Conceptual/design question - per gateway/DTMF & PSQL

[Steven Ayre]

The dtmf_type channel variable can be used to override the profile's dtmf
setting. Valid settings are rf2833, info and none. Inband would be more
complex, as you'd need to call the start_dtmf_generate application, not sure
how you could easily integrate that with mod_lcr. Possibly using the
execute_on_x family of channel variables. mod_lcr would need to use custom
sql to get the additional dtmf variable.

As David pointed out, mod_lcr already lets you set the codec list for a
gateway. late-negotiation isn't *required*, but could be useful. Without it
the aleg will pick a codec, then you'll dial out with the codec list to the
gateway and transcode if needed. With it, the aleg doesn't pick the codec
until the bleg has picked one - which may make transcoding less likely.

You could also setup the gateways as sofia gateways, set the codec/dtmf
variables on the gateway and have mod_lcr return the sofia/gateway/gwname/
prefix.

A lot of the behaviour in terms of mod_lcr, execute_on_x etc has changed
since 1.0.6 so you might find you have to upgrade to get some of the newer
features.

-Steve


On 8 June 2011 02:46, Mike Taylor <mtaylor at employees.org> wrote:

> Hi,
>
> I hope that I've taught myself enough over the last few weeks that this
> isn't a blindingly stupid question…
>
> I am providing services to multiple customers on FS 1.0.6
>
> I have a basic setup; (which I have inherited, hence the basic questions);
>
> AS5350--------<external>----- FS-----<internal>------customer GW(s)
> (No Registration) (No Registration)
>
> All of the GW info is pulled from a PSWL database. Carriers, carrier_id,
> lcr table etc.
>
> The bit I am missing is;
>
> If all of my GW config is in the PSQL database, and that's all accessed by
> mod_lcr before routing the call, how do I allow for different DTMF types,
> codecs etc, PER CUSTOMER GW ?
>
> Am I stuck with actually defining the gateways statically under
> /etc/freeswitch/conf/sip_profiles/ (or I see I can doit in the dialplan, but
> that won't achieve what I need)
>
> I was hoping to be able to pull the DTMF (and other misc info) from the
> database, but the more I look into it,  the less likely it is that this will
> work I think. (mod_lcr is already at the routing stage, can't modify DTMF at
> that point AFAIK)
>
> Like I said, hope the question isn't so obvious that it's crazy…
>
> Regards,
> Mike
>
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