Summary

This Recommendation covers Physical Layer characteristics for transporting Asynchronous Transfer Mode (ATM) cells at a nominal bit rate of 51 840 kbit/s over Category 3 Unshielded Twisted Pair (UTP) cabling at the S_B reference point of the B-ISDN User Network Interface (UNI). The maximum distance is approximately 100 m. This specification may be used to take advantage of existing building wiring.

Functionality is presented in terms of Physical Media Dependent (PMD) and Transmission Convergence (TC) sublayers, and both Synchronous Digital Hierarchy (SDH)-based and cell-based formats are included.

This Recommendation is part of the I.432-series Recommendations, and includes references to Recommendation I.432.1 on general characteristics, and Recommendation I.432.2 on Transmission Convergence sublayer aspects.