Zhone Technologies 900 - Manual (Page 97)

Data Cards IMACS System Release 5.1.6 3-9
OCU-DP Card OCU-DP Card User Screens and Settings
Figure 3-4. OCU Local Loopback (net-a option)
Figure 3-5. OCU Local Loopback (net-d option)
LB GEN
The Loopback Generate settings initiate various in-band diagnostic codes sent to the remote
equipment. These codes are compatible with DDS networks and allow users to command a
latching loopback at remote DDS equipment. The ds0-n loopback loops the analog interface
of the remote OCU-DP device back towards the network for circuits using the 64K Rate. The
ocu-n loopback loops the analog interface of the remote OCU-DP device back towards the
network for circuits using the 56K or less Rates. The csu-n loopback loops the 4-wire interface
of the remote CSU/DSU device back towards the network. A 48V converter is required for
this loopback.
The csu-u loopback loops the 4-wire interface of the local CSU/DSU device towards the
network. Figure 3-6 through Figure 3-8 show the loopback locations. You can also turn all
remote loopbacks off.
Loop-up or loop-down commands cannot be implemented for two ports on the same card
simultaneously. You must finish all loopback operations on one port before trying to perform
any loopbacks on another port.
OCU-DP Card OCU-DP Card
CSU/DSU CSU/DSU Local
DTE
Remote
DTE
Carrier's DDS
Network
Local System
Local Site Remote Site
Remote System
OCU-DP Card OCU-DP Card
CSU/DSU CSU/DSU Local
DTE
Remote
DTE
Carrier's DDS
Network
Local System
Local Site Remote Site
Remote System