Bt8370/8375/8376
2.0 Circuit Description
2.8 Transmitter
Fully Integrated T1/E1 Framer and Line Interface
UMC forces DS0 channels containing eight 0s to be replaced with the
10011000 code, per Bellcore TA-TSY-000278.
NOTE: RCVR's ZCS decoder cannot recover original data content from a UMC or
B7ZS encoded signal, or from a PDV-enforced one.
The TPOSO/TNEGO output pins provide access to the P and N rail unipolar
data before it is sent to the TLIU. The output on TPOSO/TNEGO can be changed
from dual rail unipolar to NRZ unipolar data (TNRZO) and to multiframe sync
clock (MSYNCO), using the Transmit NRZ Data (TNRZ) bit in TCR1[addr 071].
The TNRZ setting does not affect the XTIP/XRING output.
N8370DSE
Conexant
2-67