Asterisk Guide - Books, Training and elearning about VoIP and Asterisk

1. New GSM Card for open source telephony
(News/Asterisk)

... E1 MFC/R2 card with echo cancellation targeted to Latin America and China, where MFC/R2 is very common. The GSM card will be available in early march for the brazilian market.  ...

2. MFC/R2 Nightmare
(Tutorials/Tutorials - Asterisk)

Introduction In the first five months of the year we have decided to check all solutions for MFC/R2 signaling at V.Office. Below is our findings. Background information R2 signaling is in use at several ...