XRT73L03 unit equivalent, 3 channel e3/ds3/sts-1 line interfce unit.
* Meets E3/DS3/STS-1 Jitter Tolerance Requirements
* Full Loop-Back Capability
* Transmit and Receive Power Down Modes
* Full Redundancy Support
* Con.
and consists of three independent line transmitters and receivers integrated on a single chip. Each channel of the XRT73.
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