Instruction Manual

Hot-Standby EXB / Network Manager
Software Manual Network Manager
CTI Products, Inc. Program Operation
33
68-11707-100
6.8.3 Main WAN Line Disconnected
Figure 29 Main WAN Line Disconnected
Since the loop is not complete, the Standby EXB turns on its network switch to
pass traffic over the Standby WAN line.
In this condition, the program can talk to the units as follows:
EXB Forward
(Clockwise)
Reverse
(Counter-Clockwise)
Main (Central) Yes No
Standby (Central) No Yes
Remote Standby No Yes
Remote Main No Yes
Based upon this, the program determines that the Main WAN Line is bad.
Other possible causes for this display could be:
1. A bad cable from one of the EXBs to the Main WAN line.
2. Bad Main Central or Main Remote EXB Module.
Possibly a bad modem in an Analog / Telco EXB unit
Possibly a bad serial port on a Serial EXB unit.