CTI Products EXB Network Manager - Manual (Page 43)

Hot-Standby EXB / Network Manager Software Manual Network Manager
CTI Products, Inc. Program Operation
39
68-11707-100
6.8.9 Standby (Central) EXB Failed
Figure 35 Standby (Central) EXB Failed
The program cannot talk to the Central Standby EXB unit.
In this condition, the program can talk to the units as follows:
EXB Forward
(Clockwise) Reverse
(Counter-Clockwise)
Main (Central) Yes No
Remote Main Yes No
Remote Standby Yes No
Standby (Central) No No
Based upon this, the program determines that the Central Standby EXB unit is
bad.
Other possible causes for this display could be:
1. No power to the Central Standby EXB Unit
2. A bad cable Central Tie Line AND Standby WAN line
(Unlikely double failure)
3. A bad cable Central Tie Line AND Remote Standby EXB WAN problem
(Bad internal modem or RS-232 port)
(Unlikely double failure)