CTC Union ETU-01A - Page 18

Chapter 1. Introduction
12
November 2001
E1 link line coding
The ETU-01A supports two E1 line codes:
AMI coding.
HDB3 coding.
E1 framing formats
The ETU-01A supports three frame formats:
Unframed format.
FAS (CCS, PCM-31) format.
MFAS (CAS, PCM-30) format.