XRT72L71

www.DataSheet4U.com áç AUGUST 2002 XRT72L71 DS3 ATM UNI/CLEAR CHANNEL FRAMER REV. 1.1.0 GENERAL DESCRIPTION The XRT72L71 DS3 ATM User Network Interface (UNI)/Clear-Channel Framer is designed to function as either a DS3 ATM UNI or Clear channel framer. For ATM UNI applications, this device provides the ATM Physical Layer (Physical Medium Dependent and Transmission Convergence sub-layers) interface for both the public and private networks at DS3 rates. For Clear-Channel framer applications, this device supports the transmission and reception of “user data” via the DS3 payload bits. The XRT72L71incorporates Receive, Transmit, Microprocessor Interface, Performance Monitor, Test and Diagnostic and Line Interface Unit Scan Drive sections. APPLICATIONS Private User Network Interfaces ATM Switches ATM Concentrators DSLAM Equipment DS3 Frame Relay Equipment FEATURES Compliant with UTOPIA Level 1 and 2 with 8 or 16 Bit Interface Specification and supports UTOPIA Bus speeds of up to 50 MHz Contains on-chip 16 cell FIFO in both the Transmit (TxFIFO) and Receive Directions (RxFIFO) Contains on-chip 54 byte Transmit OAM Cell buffer and a 108 byte Receive OAM cell buffer, for transmission, reception and processing of OAM cells. Supports PLCP or ATM Direct Mapping modes Supports M13 and C-Bit Parity Framing Formats Supports DS3 Clear Channel Framing Applications Includes PRBS Generator and Receiver Supports Local, Remote-Line, Cell, and PLCP Loop-backs Interfa...