Zhone Technologies Network Device manual

Zhone Technologies, Inc. IMACS Product Book, Version 4

All three remote loop backs are latching loop backs. These latching loop backs are:

•Loop back of the analog interface of the remote OCU-DP device back towards the network

•Loop back of the 4-wire interface of the remote CSU device back towards the network

•Loop backs of the 4-wire interface of the local CSU device towards the network.

An OCU-DP port may be programmed to detect and respond to both latching and non-latching (i.e., alternating) DDS-format OCU loop back codes that are initiated from the remote end of the circuit. A time-out option authorizes the OCU-DP port to automatically release the loop back after ten minutes.

March 2001 Page 55