Zhone Technologies IMACS Network Device - Manual (Page 59)

Zhone Technologies, Inc. IMACS Product Book, Version 4
March 2001 Page 55
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.