FEATURES
The TUPP+622 chip offers the following features:

• A configurable, multi-channel, payload processor for alignment of SONET Virtual Tributaries or SDH Tributary Units in an STS-12/STM-4 or four STS-3/STM-1 byte serial data streams. Configurable to process any legal mix of tributaries.
• Provides independently-configurable AU3/AU4 frame format on incoming and outgoing directions.
• Compensates for pleisiochronous relationships between incoming and outgoing higher level (STS-1 to AU3) synchronous payload envelope frame rates through processing of the lower level (VT6 to TU11) tributary pointers.
• Provides for multiframe synchronization or ring closure at the head-end node in a SONET/SDH ring.
• Optionally frames to the H4 byte in the Path overhead to determine tributary multiframe boundaries.
• Inserts valid pointers, and all-zeros transport overhead bytes on the outgoing stream with valid “Telecombus” control signals.
• Independently-configurable incoming and outgoing interfaces that operate in 19.44 MHz or 77.76 MHz byte interface modes.
• Provides a standard JTAG test port for boundary scan board test purposes.
• Provides a generic 8-bit microprocessor bus interface.
• Low power 2.5V CMOS core logic/3.3V TTL compatible inputs and outputs
• Available in a 304-pin SBGA package.
• Supports industrial temperature range (-40°C to 85°C) operation.
• Extracts and serializes the entire tributary Path overhead of each tributary.
• Detects tributary elastic store underflow and overflow errors.
• Stores and processes 16-byte or 64-byte format tributary Path trace messages (tributary trail trace identifiers). Detects tributary Path Trace Mismatch and unstable alarms.
• Detects tributary Path Signal Label Mismatch and unstable alarms.
• Extracts tributary Path signal label into internal registers and detects Change of Tributary Path Signal Label events for each tributary.
• Detects tributary unequipped defect, tributary Path Defect Indication, and the assertion and removal of tributary extended Remote Defect Indications.
• Extracts and stores tributary size bits.
• Calculates and compares the tributary Path BIP-2 error detection code.
  Accumulates the BIP-2 errors and tributary Path Remote Error Indications on a block or bit basis.

APPLICATIONS
Use the TUPP+622 chip in the following applications:

• SONET/SDH Add/Drop and Terminal Multiplexers
• SONET/SDH Broadband Cross-Connects
• SONET/SDH and ATM Test Equipment