[Asterisk-Users] Re: Asterisk compatible E1 cards

[Marcelo Pacheco]

First there's Analog R2 and digital R2. I'm concerned with digital R2 (R2D) 
only.

R2 is equivalent to the american robbed bit signalling used in the US.
Q.421 is the ITU document number. It costs money to download the 
specification. And it is only the generic part of it, it doesn't cover the 
country-to-country specifics.
I have a document in Portuguese for the Brazilian R2D specification, meaning 
the specifics for our country.
I'm intending to write it, but I'll only have the hardware about 1 month from 
now.

For India, you would need to contact the Indian telephony regulatory agent, 
maybe they have it available over the Internet, I got the Brazilian document 
through our national agency's site.

Also, before you can plug a Digium card to any Indian telco provided E1, you 
need to get the card certified, otherwise it can get you jail time/fines, at 
least in other countries. Here in Brazil I'm planning to plug it into a 
Brazilian certified PBX to avoid any legal trouble.

Marcelo Pacheco

Em Sex 27 Ago 2004 11:22, Vikram Rangnekar escreveu:
> +++ Marcelo Pacheco [27/08/04 11:06 -0300]:
> > It's not the card's fault, it's the lack of a software driver fault.
> > R2 has a country dependent implementation. Some countries even have two
> > incompatible standards internally.
> >
> > Em Sex 27 Ago 2004 11:03, Vikram Rangnekar escreveu:
> > > After days of searching i've finally figured out that E1 lines in india
> > > use multiple types of signalling from EuroISDN to R2. Digium E1 cards
> > > dont work for R2 type signalling. Can anyone suggest me asterisk
> > > compatible E1 cards which would work on R2. Also if anyone on this list
> > > is from INDIA and uses asterisk and E1 lines please let me know what
> > > type of cards (which vendor) do you use and what type of signally your
> > > E1 line uses.