[Asterisk-Users] Brazilian Protocol

[Steve Underwood]

Amaury Jacquot wrote:

> Steve Underwood wrote:
>
>> Amaury Jacquot wrote:
>>
>>> Daniel Bichara wrote:
>>>
>>>>
>>>> Hi Alex,
>>>>
>>>>
>>>> Alex G Robertson wrote:
>>>>
>>>>> Hi all,
>>>>>
>>>>> I would like to have some information about your TE410p and TE405p
>>>>> cards compatibility with telephony protocols adopted in Brazil.
>>>>>
>>>>> - When in E1 mode, does it support R2 DIGITAL MFC 5C ?
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> You need a R2 converter. R2lib is "under construction".
>>>>
>>>
>>> but ? what is R2 ?
>>
>>
>>
>> If you don't know, then don't worry. Your life is simpler for it.
>>
>>
>>
>>
>>
>>
>> Oh, OK. Its a trunk signalling system, based on dual tones (not DTMF 
>> - other dual tones). It sucks. It makes no sense in the age of 
>> digital networks. Its heavily used in South America, parts of Asia, 
>> and parts of Eastern Europe for E1s.
>
>
> ah, ok
> it's signaling system 5, aka Q.140...
> /me guesses blue boxing still works there :D

No. Its nothing to do with signalling system 5. That uses a single tone.

Q.462 to Q.478 cover R2. You need to know how it has been modified in 
each country too, as nobody quite implements the ITU specs.

Regards,
Steve