TADM SONET/SDH Interface
  • Provides a versatile solution for quad OC-3, quad OC-12, and for single OC-48 linear and ring datacom/telecom applications
  • Incorporates integrated SONET/SDH framing, section/line/path termination, pointer processing, cross connect, and data engine blocks
  • Provides complete encapsulation and de-encapsulation for packet and ATM streams into and out of SONET/SDH payloads
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Features

  • Mix Transmission convergence and SONET/SDH terminal/ADM functionality for linear and ring networks
  • Virtual concatenation with dynamic pipe-sizing
  • Versatile IC supports 155/622/2488 Mbits/s SONET/SDH interface solutions for packet over
  • SONET (POS), packet over fiber (POF), or asynchronous transfer mode (ATM) applications
  • Low-power 1.6/3.3 V operation

SONET/SDH Interface

  • Termination of quad STS-3/STM-1, quad STS-12/STM-4, or single STS-48/STM-16
  • Supports overhead processing for transport
    and path overhead bytes

Data Processing

  • Provisionable data engine supports payload
    insertion/extraction for PPP, ATM, or HDLC streams
  • Extraction and insertion of DS3 frames containing HDLC or ATM datastreams for up to 16 channels

Interfaces

  • Enhanced UTOPIA interface for cell and packet
    transfer (PLATO)
  • Built-in redundant STS/STM backplane interface
    using 622 MHz LVDS technology

Microprocessor Interface

  • Up to 66 MHz synchronous
  • 16-bit address and 16-bit data interface

Benefits

  • Enables dramatic system cost reduction and the ease of development of competitive solutions through its support for different types of applications for OC-3/OC-12/OC-48 data equipment
  • Virtual Concatenation benefits include:
    — Dynamic resizing channels to payloads that may not
         efficiently fit in a conventional SONET contiguous 
         concatenation structure
    — A dynamic bandwidth allocation (DBA) mechanism 
         that hitlessly resizes the channels of traffic using
         the H4 byte                                                                       —  Flexibility of channel selection for concatenation; 
          any STS-1 in any time slot of a server signal can 
          be concatenated with any other STS-1 in any 
          arbitrary time slot of that transport channel  
  • General Framing Procedure benefits include:
    — Equips SONET/SDH with flexible/efficient data 
         transport capabilities
    — More robust frame delineation than flag- based 
         mechanisms such as HDLC                                       — No payload dependent frame expansion 
         (no HDLC type byte stuffing)
Product Brief (1)

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