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Comtech EF Data MIDAS Version 4.X NMS Configuration User Manual

Page 18

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MIDAS 4.X NMS Configuration , Rev. 6
1–6

Introduction to MIDAS NMS

Controller Server

Redundancy

In an optional 1:1 redundant configuration, the backup Controller Server
monitors the active Controller Server and the RF chain.

If a failure is detected in the active Controller Server or the RF chain, the
backup NMS assumes the active role. If required, the Controller Server
operator can command a switchover 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 EFData'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 EIA-
232, 19.2 kbps. Modem A and Modem B must have remote addresses 2 and 3,
respectively. Those modems must be configured at 9600 bit/s. (EIA-485, 2-
wire, Even). For detailed information on the SMS-301 switch, refer to the
SMS-301 Redundancy Switch Installation and Operation Manual.