The RCC 521 STS/3 Synchronizer and Framer provides all the frame recognition and
synchronization functions required of a SONET/SDH line interface. It performs
on-chip clock recovery and clock synthesis
PECL I/O for direct interface to fiber-optic modules
Receives 19.44 MHz byte clock and byte data from terminal and provides
serial data to network
Scrambling/descrambling and BIP 8 calculation/checking with optional bypass
mode