[Freeswitch-dev] TDM questions: OZ, signaling on digital spans

[Michael Collins]

> I have never worked on T1 but just E1 in México, but have read several
> times different books about CAS. AFAIK you are correct, except I
> cannot confirm your  SF vs ESF statement. In the E1 world RBS is not
> used to implement CAS, but rather channel 16 is used to multiplex the
> ABCD bits for all the other channels, so ABCD update per channel
> arrives each 2 ms in channel 16.
> 
> Moisés Silva ( moy )

Muchas gracias!  I appreciate your input.  I know nothing about E1's so it's good to hear from someone who's worked with them.

-MC