PM5361

· Configurable, multi-channel, payload processor for alignment of SONET virtual tributaries (VTs) or SDH tributary units (TUs). Processes an STS-3 or STM-1 byte serial data stream.
· Transfers all incoming tributaries in the three STS-1 synchronous payload envelopes of an STS-3 byte serial stream to the three STS-1 synchronous payload envelopes of an outgoing STS-3 byte serial stream.
· Transfers all incoming tributaries in the single AU4 or three AU3 administrative units of an STM-1 byte serial stream to the single AU4 or three AU3 administrative units of an outgoing STM-1 byte serial stream.
· Compensates for pleisiochronous relationships between incoming and outgoing higher level (STS-1, AU4, AU3) synchronous payload envelope frame rates through processing of the lower level (VT6, VT3, VT2, VT1.5, TU3, TU2, TU12, or TU11) tributary pointers.
· Provides multiframe synchronization for ring closure at the headend node in a SONET/SDH ring.
· Provides independently configurable AU3/AU4 frame format on incoming and outgoing directions.
· Configurable to process any legal mix of tributaries such as VT1.5, VT2, VT3, VT6, TU11, TU12, TU2, or TU3. Each VT group or TUG2 can be configured to carry one of four tributary types. TUG2s can be multiplexed into VC3s or TUG3s. Each TUG3 can also be configured to carry a TU3.
· Optionally frames to the H4 byte in the path overhead to determine tributary multiframe boundaries. Internally generated H4 bytes with leading logic 1 bits are inserted into the outgoing administrative units.
· Verifies parity on the IC1J1 and ISPE signals and on the incoming data stream and generates parity on the outgoing data stream.
· Detects loss of pointer and re-acquisition for each tributary and optionally generates interrupts. Loss of pointer detection can optionally generate tributary path AIS.
· Allows insertion of all zeros or all ones tributary idle code with unequipped indication and valid pointer into any tributary.
· Allows insertion of tributary path AIS into any tributary.
· Operates in conjunction with the PM5323 TSPP Triple SONET/SDH Payload Processor and the PM5344 SONET/SDH Path Terminating Transceiver to align tributaries such that they can be switched by the PM5371 TUDX SONET/SDH Tributary Unit Cross-Connect.
· Operates from a single 19.44 MHz clock.
· Provides a generic 8-bit microprocessor bus interface for configuration, control, and status monitoring.
· Low power, +5 Volt, CMOS technology, TTL compatible inputs and outputs.
· 160 pin plastic quad flat pack (PQFP) package

The PM5361 TUPP SONET/SDH Tributary Unit Payload Processor is a monolithic integrated circuit that implements a configurable, multi-channel, payload processor for alignment of SONET virtual tributaries (VTs) or SDH tributary units (TUs.)

When configured for SONET compatible operation, the TUPP transfers PM5361 all tributaries in the three STS-1 synchronous payload envelopes of an incoming STS-3 byte serial stream to the three STS-1 synchronous payload envelopes of an outgoing STS-3 byte serial stream. Similarly, when configured for SDH compatible operation, the TUPP transfers PM5361  all tributaries in the single AU4 or three AU3 administrative units of an incoming STM-1 byte serial stream to a single AU4 or three AU3 administrative units of an outgoing STM-1 byte serial stream.

The TUPP PM5361 compensates for pleisiochronous relationships between incoming and outgoing higher level (STS-1, AU4, AU3) synchronous payload envelope frame rates through processing of the lower level (VT6, VT3, VT2, VT1.5, TU3, TU2, TU12, TU11) tributary pointers.

The TUPP PM5361 is configurable to process any legal mix of tributaries. Each VT group can be configured to carry any one of the four tributary types (VT1.5, VT2, VT3, or VT6) and each TUG2 can be configured to carry any one of three tributary types (TU11, TU12, or TU2). TUG2s can be multiplexed into a VC3 or a TUG3. Alternatively, each TUG3 can be configured to carry a TU3.

The TUPP PM5361 operates in conjunction with the PM5323 TSPP Triple SONET/SDH Payload Processor and the PM5344 SONET/SDH Path Terminating Transceiver to align tributaries such that they can be switched by the PM5371 TUDX SONET/SDH Tributary Unit Cross-Connect.

The TUPP PM5361 provides useful maintenance functions. They include detection of loss of pointer and pointer re-acquisition for each tributary, and optional generation of interrupts. The TUPP also allows insertion of tributary path AIS or tributary idle (unequipped). The TUPP can also insert inverted new data flag fields that can be used to diagnose downstream pointer processing elements.

No auxiliary high speed clocks are required as the TUPP PM5361 operates from a single 19.44 MHz line rate clock. The TUPP is configured, controlled and monitored via a generic 8-bit microprocessor bus interface.

The TUPP PM5361 is implemented in low power, +5 Volt, CMOS technology. It has TTL compatible inputs and outputs and is packaged in a 160 pin PQFP package.