BT8370KPF Conexant Systems, Inc., BT8370KPF Datasheet - Page 94
Manufacturer Part Number
Fully integrated T1/E1 framer and line interface
Conexant Systems, Inc.
Specifications of BT8370KPF
2.0 Circuit Description
The HDB3 line code replaces 4 consecutive 0s by 000V or B00V code, where
B is an AMI pulse and V is a bipolar violation (see
selects the code that forces the BPV output polarity opposite to the prior BPV.
Figure 2-32. Zero Code Substitution Formats
The B8ZS line code replaces strings of 8 consecutive 0s or no pulses with the
B8ZS octet 000VB0VB, where B represents a normal bipolar pulse and V
represents a BPV. A BPV that is not part of B8ZS octet is a BPV error.
B7ZS replaces Bit 7 of all assigned time slots with a 1 if the contents are all 0.
B7ZS encoding is enabled on a per-channel basis in the Transmit Per-Channel
Control register [TPC0 to TPC31; addr 100 to 11F].
PDV enforcer overwrites transmit 0s that would otherwise cause output data
to fail to meet the minimum required pulse density, per ANSI T1.403 sliding
Fully Integrated T1/E1 Framer and Line Interface
Zero Code Substitution Formats
The enforcer never overwrites a framing bit and is not applicable during
2-32). ZCS encoder