
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
36
8
Description
The PM5317 SONET/SDH Payload Extractor/Aligner (SPECTRA-9953) device terminates the
transport and path overhead of a single STS-192 (STM-64/AU4-16c/AU4-4c/AU4/AU3)
stream, a single STS-192c (STM-64/AU4-64c) stream, quad STS-48 (STM-16/AU4-
4c/AU4/AU3) streams or quad STS-48c (STM-16-16c) data streams at 9953 Mbit/s. The
SPECTRA-9953 device implements significant functions for a SONET/SDH-compliant line
interface.
In single STS-192/STM-64 mode, the SPECTRA-9953 receives SONET/SDH frames via a 16-
bit LVDS interface at 622.08 Mbit/s. In quad STS-48/STM-16 mode, the SPECTRA-9953
receives SONET/SDH frames via four 4-bit LVDS interfaces at 622.08 Mbit/s. The SPECTRA-
9953 terminates the SONET section, line and path or the SDH regenerator section, multiplexer
section and high order path overhead. It performs framing (A1, A2), descrambling, detects
section and line alarm conditions, and monitors section and line bit interleaved parity (BIP) (B1,
B2), accumulating error counts at each level for performance monitoring purposes. B2 errors
are also monitored to detect signal fail and signal degrade threshold crossing alarms. Line
remote error indications (M1) are also accumulated. A 16 or 64-byte section trace (J0) message
may be buffered and compared against an expected message. In addition, the SPECTRA-9953
interprets the received payload pointers (H1, H2), detects path alarm conditions, detects and
accumulates path BIPs (B3), monitors and accumulates path Remote Error Indications (REIs),
accumulates and compares the 16 or 64-byte path trace (J1) message against an expected
message, and extracts the synchronous payload envelope (SPE) (virtual container). All transport
overhead bytes are extracted and serialized on lower rate interfaces, allowing additional external
processing of overhead, if desired.
The extracted SPE (VC) is placed on a 16-bit LVDS, 8B/10B encoded, Serial Telecom Drop bus
at 777.6 MHz. For TelecomBus applications, frequency offsets (e.g., due to plesiochronous
network boundaries, or the loss of a primary reference timing source) and phase differences
(due to normal network operation) between the received data stream and the Drop bus are
accommodated by pointer adjustments in the Drop bus.
In STS-192/STM-64 mode, the SPECTRA-9953 device transmits SONET/SDH frames via a
16-bit LVDS interface at 622.08 Mbit/s. In quad STS-48/STM-4 mode, the SPECTRA-9953
device transmits SONET/SDH frames via four 4-bit LVDS interfaces at 622.08 Mbit/s. The
SPECTRA-9953 device formats the SONET section, line and path or the SDH regenerator
section, multiplexer section and high order path overhead. It performs framing pattern insertion
(A1, A2), scrambling, section and line alarm insertion, and section and line BIPs (B1, B2)
calculation as required to allow performance monitoring at the far end. Line remote error
indications (M1) are optionally inserted. A 16 or 64-byte section trace (J0) message may be
inserted. In addition, the SPECTRA-9953 generates the transmit payload pointers (H1, H2),
creates and inserts the path BIPs (B3), optionally inserts a 16 or 64-byte path trace (J1)
message, and optionally inserts the path status byte (G1). In addition to its basic processing of
the transmit SONET/SDH overhead, the SPECTRA-9953 provides convenient access to all
overhead bytes. The SPECTRA-9953 also allows a variety of diagnostic errors to be inserted
into the transmit stream, such as framing pattern errors, pointer errors, and BIP errors. These are
useful for system diagnostics and tester applications.