[Asterisk-Dev] libpri ISDN features

[Peter Svensson]

On Wed, 24 Nov 2004, Andrew Kohlsmith wrote:

> I found the ITU's documents completely and totally worthless.  There was *no* 
> actual protocol layout, just highlevel hand-waving in all the documents I 
> downloaded.

There is a lot of cross referencing, but everything is specified down to 
the very last bit and even to the voltage levels and waveforms. Some 
things are implmentation extensions and these are not listed, but that is 
usually implementational choises.

You probably need a lot of the standards though.

Peter