ATM Transmitter/Receiver with UTOPIA Interface
1.0 Product Description
1.3 Line Framing Functions
1.3.3 BIP-8 Code
The octet Bit Interleaved Parity (BIP-8) code is checked and error status
generated for the Far End Block Error (FEBE) function and yellow alarm. BIP-8
code violations and framing-octet errors are counted. OOF events are detected
and counted. The transmitter output can be looped to the receiver input for test
purposes and to perform startup self-tests and diagnostics.
In all PHY modes, an OOF input from the internal or external framer can be
used to indicate that the received signal is not being received correctly. This input
inhibits cell validation functions and initiates cycle stuffing, when required.
1.3.4 Alarm Detection/Generation
All line alarm and error conditions including BIP codes are monitored and
reported in status registers and event counters. Alarms and errors can be
configured to generate an interrupt to the microprocessor. The CN8223 can
transmit alarm and error conditions under microprocessor control.