Comtech EF Data MIDAS Version 4.X Basic Configuration - Manual (Page 20)

MIDAS 4.2 Basic Configuration, Rev. 1
1–6 Getting
Started
If a failure is detected in the active Controller Server or the RF chain, the
backup Controller Server assumes the active role. If required, the operator can
command a switch-over manually.
Active and backup Controller Server(s) synchronize the databases on the LAN
over a dedicated circuit.
Optional 1:1 redundancy for the Network Control Modem or the LinkSync™
Modem is provided via Comtech EF Data's SMS-301 Redundancy Switch.
Within 20 milliseconds of a detection of a fault in the online modem, the
SMS-301 switches to the backup modem.
The SMS-301 switch must be configured as remote address 1 running at
19.2 kbit/s. Modem A and Modem B must have remote addresses 2 and 3,
respectively. Those modems must be configured at 9600 bit/s.
For detailed information on the SMS-301 switch, refer to the SMS-301
Redundancy Switch Installation and Operation Manual.
LAN