TNETA1600
SONET/SDH ATM RECEIVER/TRANSMITTER
FOR 622.08-MBIT/S OR 155.52-MBIT/S OPERATION

SDNS036 - FEBRUARY 1996

features

• Termination/Generation of 155.52-Mbit/s or 622.08-Mbit/s SONET/SDH Frames Carrying ATM Cells; Including:
  • Frame Scrambling/Descrambling
  • Pointer Processing
  • ATM-Cell Delineation
  • ATM-Cell Extraction/Insertion
  • ATM-Cell Payload Scrambling/Descrambling
  • Cell-Rate Decoupling
• Access to Receive and Transmit Transport-Overhead (TOH) and Path-Overhead (POH) Bytes Through the Controller Interface
• Detects Multiple-Bit Errors and Corrects Single-Bit Errors in the 5-Byte ATM Headers of Incoming ATM Cells
• Separate Serial Receive- and Transmit-Data Communication Ports Allow Access to Data Communications and Orderwire-Overhead Bytes
• Alarm Generation/Checking in Accordance With BellCore, ANSI, and ITU-T Specifications
• Performance Monitors/Counters Provide Statistics on B1/B2/B3 Coding Violations, B1/B2/B3 Block Errors, Line and Path Far-End Block Errors (Line FEBEs and Path FEBEs) and Other Status Data
• Supports Boundary Scan Through a 5-Wire JTAG Interface in Accordance With IEEE Std 1149.1-1990 (Includes IEEE Std 1149.1a-1993) IEEE Standard Test-Access Port and Boundary-Scan Architecture

description

The synchronous optical network (SONET)/synchronous digital hierarchy (SDH) asynchronous transport mode (ATM) line-interface receiver/transmitter provides a versatile solution for transporting ATM cells over the SONET/SDH network at 155.52 Mbit/s or 622.08 Mbit/s.

On the receive side, the TNETA1600 accepts byte-wide data aligned to proper SONET- /SDH-byte boundaries, performs frame alignment and descrambling, and extracts SONET/SDH payload and overhead. The overhead is placed in the receive-overhead RAM where each byte can be accessed through the controller interface. Cell boundaries are established in the payload and ATM cells are extracted, descrambled, and passed to the receive output FIFO for output to the ATM-layer device (i.e., a reassembly device).

On the transmit side, complete ATM cells are scrambled and placed in a SONET/SDH synchronous payload envelope (SPE). Transport- and path- overhead bytes are programmable through the transmit-overhead RAM. The overhead and payload are scrambled and sent out as a byte-wide data stream.

The TNETA1600 is characterized for operation over a temperature range of -40°C to 85°C.