User manual

Chapter 1
Overview
The Digium TE120 Series cards are a T1/E1 capable card series created
for voice. They support industry standard protocols, including Robbed Bit
Signaling (also known as CAS or Channel Associated Signaling), CCS
(Common Channel Signaling), E&M, and Primary Rate ISDN (PRI). The
TE120 Series cards are capable of running in E1, T1, or J1 modes.
Designed to be fully compatible with existing software applications and
integrate fully with the Asterisk platform, the TE120 Series cards allow
many advanced call features.
Digium, Inc. Page 12