Comtech EF Data SMS-301 - Manual (Page 43)

SMS-301 Redundancy Switch Operation
Rev. 3 3-5
3.2.2.3 Operation Mode
Two modes of operation are available for the 1:1 switch:
AUTOMATIC If the AUTOMATIC mode is selected, the 1:1 switch algorithm
will perform backup operations as defined in the Configuration
menus.
MANUAL When the MANUAL mode is selected, the system provides a
dedicated menu through which the operator may unconditionally
assign backup RX and TX functions to replace the prime
modem.
Note: The 1:1 switch shall be in AUTOMATIC mode to automatically replace the
faulted prime.
The manual configuration may be used when Modem A parameters are to be different
than Modem B. The 1:1 switch is then used as a master switch. Turn automatic verify
off. (The automatic verify is located under the Utility Modem Control menu.)
3.3 Faults
Alerts to modem or 1:1 switch faults are provided in several ways:
•
Indicators on the 1:1 switch control panel, with specific information available in
the Faults/Alarms menu.
•
On demand via the 1:1 switch remote port. Specifics for 1:1 switch and modem
faults are available.
•
Analog status/fault indication signals on the rear of the 1:1 switch (J14).
Note: Refer to Chapter 5 for troubleshooting switch faults, or the respective modem
manual for modem faults.