XRT72L58

www.DataSheet4U.com áç JANUARY 2001 PRELIMINARY XRT72L58 REV. P1.1.2 EIGHT CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER GENERAL DESCRIPTION The XRT72L58 Octal DS3/E3 Framer is designed to accept “User Data” from the Terminal Equipment and insert this data into the “payload” bit-fields within an “outbound” DS3/E3 Data Stream. Further, the Framer is also designed to receive an “inbound” DS3/E3 Data Stream (from the Remote Terminal Equipment) and extract out the “User Data”. The XRT72L58 DS3/E3 Framer is designed to support full-duplex data flow between Terminal Equipment and an LIU (Line Interface Unit) IC. The Framer will transmit, receive and process data in the DS3-Cbit Parity, DS3-M13, E3-ITU-T G.751 and E3-ITU-T G.832 Framing Formats. The XRT72L58 DS3/E3 Framer consists of Eight Transmit sections, Eight Receiver sections, Eight Performance Monitor Sections and a Microprocessor interface. The Transmit Sections, include a Transmit Payload Data Input Interface, a Transmit Overhead data Input Interface Section, a Transmit HDLC Controller, a Transmit DS3/E3 Framer block and a Transmit LIU Interface Block which permits the Terminal Equipment to transmit data to a remote terminal. The Receive Sections, consist of a Receive LIU Interface, a Receive DS3/E3 Framer, a Receive HDLC Controller, a Receive Payload Data Output Interface, and a Receive Overhead Data Interface which allows FIGURE 1. BLOCK DIAGRAM OF THE XRT72L58 the local terminal equipment to receive data from remot...