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PM5344 (SPTX)
SONET/SDH Path overhead Terminating Transceiver
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Features
GENERAL
- Monolithic SONET/SDH Path overhead Terminating Transceiver for use in STS-1, STS-3 or STM-1 applications, operating at rates up to 155.52 Mbit/s.
- Maps one or three STS-1 (AU3) payloads or a single STS-3c (AU4) payload to the system timing reference, accommodating timing offsets through pointer processing.
- Operates at 19.44 MHz or 6.48 MHz, processing a duplex 19.44 Mbyte/s or 6.48 Mbyte/s data stream.
- Provides parallel bus interface which indicates/accepts the location of the STS identification byte (C1), the path trace byte(s) (J1), the first tributary overhead byte(s) (V1), and all bytes in the byte serial stream.
- Supports line loopback from receive stream to transmit stream and diagnostic loopback from ADD bus interface to DROP bus interface.
- Inserts and extracts the 64 (or 16) byte path trace (J1) and the path signal label (C2). Detects path trace/signal label unstable and indicates mismatch condition with the expected downloaded value.
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- Operates in conjunction with the PM5312 STTX or the PM5343 STXC to form a complete physical interface up to photonics.
- Provides a generic 8-bit interface bus for microprocessor configuration, control, and status monitoring.
- SATURN-Compatible (TM) - ensures interoperability with the full SATURN family of ATM, SDH, SONET and PDH broadband networking devices.
- Low power, +5 Volt, CMOS technology, TTL compatible I/O.
- Available in a 160 pin PQFP (28x28 mm) package.
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RECEIVE SECTION
- Interprets the line side STS (AU) pointer bytes (H1, H2, and H3), and extracts and inserts the synchronous payload envelope(s) into a byte serial DROP bus referenced to system timing. Accommodates phase and frequency differences between the received
- stream and the DROP bus via pointer adjustments.
- Extracts and serializes the entire path overhead from the three STS-1 (AU3) or single STS-3c (AU4) stream to enable external overhead processing.
- Detects loss of pointer (LOP), loss of tributary multiframe (LOM), path alarm indication signal (AIS) and path FERF alarm.
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- Detects and counts received path BIP-8 errors and counts received path far end block errors (FEBEs).
- Supports tandem connection origination by sourcing a new Z5 byte, reporting received BIP-8 errors and the data link message and correcting subsequent path BIP-8 bytes (B3) to reflect the change in Z5.
- Supports tandem connection termination by accumulating the incoming error count (IEC) and extracting the Z5 byte tandem connection data link.
- Provides a serial alarm port for communication of FEBE and path FERF alarms to the reverse direction for ring applications.
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TRANSMIT SECTION
- Inserts the transmit stream path overhead bytes. Path overhead insertion may be sourced from internal registers or from a bit serial input stream. Phase and frequency differences between the ADD bus and the line are accommodated via pointer adjustments.
- Optionally inserts STS path AIS and STS path FERF alarm.
- Optionally calculates and inserts path BIP-8 error detection codes.
- Optionally inserts the path FEBE count into the path status byte (G1) based on receive path BIP-8 errors.
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- Diagnostic errors may be inserted in the path BIP8 byte (B3).
- Optionally inserts all-ones payload data for unequipped operations.
- Optionally generates cyclical tributary multiframe pattern.
- Supports in-band error reporting of BIP-8 and path alarms in the path status byte (G1).
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Applications
- SONET/SDH Add Drop Multiplexers
- SONET/SDH Terminal Multiplexers
- SONET/SDH Cross Connects
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- SONET/SDH Tandem Path Termination Equipment
- SONET/SDH Test Equipment
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SPTX Short Form Data Sheet [109 kB] PMC-1940309 