[Asterisk-Users] Re: RES: Working E1 MFC/R2 M?xico !!! (Steve Underwood)

[Steve Underwood]

Hi Julio,

At some point in the past I paste the following into the source code for 
my MFC/R2 library, related to Brazil:

        /* Some switches have a provision for a "reanswer" signal with
           which an inbound terminal equipment can automatically reject
           all collect calls. To do this, the equipment pulses a clear
           back line code, immediately after signaling the answer line
           code to connect a call. If this pulse is sent to the switch,
           and the call is a collect call, the switch clears the call
           back and then clears the line forward. */

I'm not sure where I got that from, but it sounds like it is describing 
the same feature. Right now, I have not implemented this.

Regards,
Steve


Julio Arruda wrote:

> The featuer you describe is one I don't know about. It isn't in the 
> documentation I have, and  don't thing people like Dialogic and NMS 
> have it in their implementations. Can you say more about what is 
> supposed to happen?
>
> I don't have Brazil E1/R2 specs (few years since I worked with that).
> The bottom line is that in Brazil, you can do a collect call with some
> specific prefix dialed before (9?), and the remote end phone would play
> to the called number an announcement "this is a collect call from " (the
> calling person would speak their name them, being given of course the
> proper announcement also)" hangup now if you don't want to accept this
> call".
> The called person would just hangup (or not).
> In E&M trunks, this similar behaviour would be done in PBX with
> "off-hook, on-hook, off-hook" with specific timers. That is how old
> times ISPs would refuse collect calls for their modem banks :-), and PBX
> also. (non-collect calls would not be dropped with this trick if the
> public switches  had the proper configuration).
> Notice that in Brazil calls are charged per minute (even local calls),
> so...(still so I think)
> In E1/R2, the "telebras 1996" standard would have some A/B codes for
> that, where the PBX would refuse calls also with E1/R2 signals (really
> don't remember the specifics).
> The gotcha (at least in 1998 or so) was that many public telco switches
> DIDN'T suppor the E1/R2 1996 feature for that collect call
> 'refusal/acceptance' codes, so, even in E1/R2 you would do the
> off/on/off trick to refuse collect calls.
> Anyone from Brazil would have these details about the E1/R2 specs ? I'm
> sure is part of requirements for any company there the "collect call"
> thing...
> [], <O-O>
>
>
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