
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
25
2.2
SONET Section and Line / SDH Regenerator and Multiplexer
Section
Frames to the SONET/SDH receive stream and inserts the framing bytes (A1, A2) and the
section trace byte (J0) into the transmit stream; descrambles the received stream and
scrambles the transmit stream.
Calculates and compares the bit interleaved parity (BIP) error detection codes (B1, B2) for
the receive stream. Calculates and inserts B1 and B2 in the transmit stream. Accumulates
near end errors (B1, B2) and far end errors (M1) and inserts line remote error indications
(REI) into the M1 byte based on received B2 errors.
Detects signal degrade (SD) and signal fail (SF) threshold crossing alarms based on
received B2 errors.
The entire SONET/SDH transport overhead (used and unused bytes) is extracted to and
inserted from dedicated pins.
Extracts and serializes on dedicated pins the data communication channels (D1-D3,
D4-D12) and inserts the corresponding signals into the transmit stream.
Extracts and filters the automatic protection switch (APS) channel (K1, K2) bytes into
internal registers. Inserts the APS channel into the transmit stream.
Extracts and filters the synchronization status message (S1) byte into an internal register for
the receive stream. Inserts the synchronization status message (S1) byte into the transmit
stream.
Extracts a 64-byte (Telcordia-compatible) or 16-byte (ITU-compatible) section trace (J0)
message using an internal register bank for the receive stream. Detects an unstable message
or mismatch message with an expected message. Inserts a 64-byte or 16-byte section trace
(J0) message using an internal register bank for the transmit stream. Provides access to the
accepted message via the microprocessor port.
Detects loss of signal (LOS), out of frame (OOF), loss of frame (LOF), line remote defect
indication (RDI), line alarm indication signal (AIS), and protection switching byte failure
alarms on the receive stream.
Provides a transmit and receive ring control port, allowing alarm and maintenance signal
control and status to be passed between mate SPECTRA-9953 devices for ring-based Add/
Drop multiplexer and line multiplexer applications.
Configurable to force Line AIS in the transmit stream.
Provides automatic transmit line RDI insertion following detection of various received
alarms (LOS, LOF, LAIS, SD, SF, STIM, STIU). Registers are provided to individually
enable/disable each alarm.
Provides automatic Drop bus path AIS insertion following detection of various received
alarms (LOS, LOF, LAIS, SD, SF, STIM, STIU). Registers are provided to individually
enable/disable each alarm.