[Asterisk-Users] R2-Digital (Q.421)

[Steve Underwood]

Hi,

I tried hunting for a little more info. I think all that happens with 
this is they use the Q.421 spec for handling the ABCD bits, and then 
simply send the DNIS through as DTMF after the seize if acknowledged. 
That means they loose some of the functionality of real R2 signalling - 
e.g. no busy, NU, or congestion detection. It wouldn't take a lot of 
work to implement that.

Regards,
Steve


Steve Underwood wrote:

> Hi Jesus,
>
> The Cisco kit, and one or two other products, offer an R2 digital 
> using DTMF mode, but this is the first time I have heard of it being 
> used. The spec for this is definitely not Q.421. That spec does not 
> mention DTMF at all. R2 using DTMF doesn't appear to be in the ITU 
> specs, as far as I can tell. Without a spec, or any equipment to play 
> with, there isn't a lot I can do right now.
>
> Steve
>
>
> Jesus Mogollon wrote:
>
>> Hi Steve:
>>
>>  Thanks for your help. I really appreciate it..
>>
>>   My provider is CANTV in Venezuela. There's a venezuelan variant in 
>> the code and I'm using that. Incoming works perfectly, outgoing is 
>> not working. I'm being told that incoming is MFCR2 but outgoing is 
>> R2-Digital with DNIS DTMF. There is a Cisco router working and it's 
>> using the following:
>>
>> r2-digital-dtmf-dnis R2 ITU Q421 DTMF tone signaling with DNIS
>>
>>
>> What's the equivalent in libmfcr2 and Unicall?
>>
>> Again, thank you for your help and your code!
>>
>> Jesus Mogollon
>>
>> 2005/11/5, Steve Underwood <steveu at coppice.org 
>> <mailto:steveu at coppice.org>>:
>>
>>     Hi Jesus,
>>
>>     FX is not a variant of R2. It is a completely different signalling
>>     protocol. This means your service provider is using R2 for some of
>>     your
>>     channels, and providing all your incoming calls on those channels.
>>     It is
>>     use FX signalling for other channels, and you must make your 
>> outgoing
>>     calls there. Someone else told be about a similar configuration. I
>>     think
>>     they were able to use chan_zap for the other channels, and make
>>     use of
>>     its FX signalling features. I am not sure how that works, as FX
>>     signalling over E1s is far from standardised.
>>
>>     Regards,
>>     Steve
>>
>>
>>     Jesus Mogollon wrote:
>>
>>     > Steve:
>>     >
>>     >   That's exactly what I'm using. Incoming calls work like a
>>     charm but
>>     > when I try calling I get a protocol error. My provider says 
>> that for
>>     > outgoing I need to use fx signalling. I see that in unicall.conf
>>     > there's such a thing as protocolvariant=fx but if I uncomment that
>>     > line, unicall gives me an error. Any ideas? Thanks for your 
>> help...
>>     >
>>     > 2005/11/4, Steve Underwood <steveu at coppice.org
>>     <mailto:steveu at coppice.org>
>>     > <mailto: steveu at coppice.org <mailto:steveu at coppice.org>>>:
>>     >
>>     >     Jesus Mogollon wrote:
>>     >
>>     >     >Does anyone know how to make this work with Asterisk?
>>     (R2-Digital
>>     >     >(Q.421)) I have MFCR2 configured but I'm told that outgoing
>>     calls are
>>     >     >to use Q421 R2 Digital signalling. Any help is appreciated.
>>     >     >
>>     >     >Jesus Mogollon
>>     >     >
>>     >     >
>>     >     See http://www.soft-switch.org <http://www.soft-switch.org>
>>     >
>>     >     Steve
>>
>
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