GENERAL DESCRIPTION
Further, the Framer IC is also designed to receive an “inbound” DS3/E3 Data Stream (from the Remote Terminal Equipment) and extract out the “User Data”. The XRT72L52 DS3/E3 Framer IC consists of two Transmit sections, two Receiver sections, two 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 XRT72L52 the local terminal equipment to receive data from remote terminal equipment. The Microprocessor Interface is used to configure the Framer IC in different operating modes and monitor the performance of the Framer.
Exar Corporation
