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PRELIMINARY
LINE INTERFACE U NIT
XRT79L73
REV. P1.0.0
3 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
JUNE 2004
HARDWARE MANUAL
The XRT79L73 is a three channel, ATM UNI/PPP Physical Layer Processor with integrated DS3/E3 framing controllers and Line Interface Units with Jitter Attenuators that are designed to support ATM direct mapping and cell delineation as well as PPP mapping and Frame processing. For ATM UNI applications, this device provides the ATM Physical Layer (Physical Medium Dependent and Transmission Convergence sub-layers) interface for the public and private networks at DS3/E3 rates. For Clear-Channel Framer applications, this device supports the transmission and reception of “user data” via the DS3/E3 payload.