Zhone Technologies 900 - Manual (Page 31)

Data Cards IMACS System Release 5.1.6 1-19
HSU Card HSU Card User Screens and Settings
Figure 1-10. Local DTE Loopback
Choose the net (network) setting to loop the incoming data from the network back toward the
far end. This loopback is shown in Figure 1-11. It tests some of the local HSU Card circuitry,
the local system common cards, the WAN link card, the far-end HSU Card and CPE device,
and the WAN link between the two sites. The net setting also drops the Data Set Ready (DSR)
control signal output on the HSU port.
Figure 1-11. Local Network Loopback
Network
HSU Card
PCM Bus
HSU
Port
T1/E1 DS-0
Network
HSU Card
PCM Bus
HSU
Port
T1/E1 DS-0