Configuration | Meo (Medium Earth Orbit) - Comtech EF Data CDM-625A Installation And Operation Manual

Advanced satellite modem (18 kbps – 25 mbps)

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CDM-625A Advanced Satellite Modem

Ethernet-based Remote Product Management

Configuration | MEO (Medium Earth Orbit)

MEO is non-functional when the optional CnC feature is enabled.

CDM-625A modems are configurable for continuous pairing as Primary and non-Primary

Modems in an Antenna Handover System when the MEO (Medium Earth Orbit) feature is

enabled. Ethernet data traffic is transmitted and received via the Primary and Non-Primary

CDM-625A's four 10/100 Ethernet ports. The Antenna Handover signal received from the user-

provided IF/RF switch determines which modem is the ONLINE or OFFLINE unit:

The ONLINE unit transmits traffic only to the WAN side while, at the same time, the

OFFLINE unit's Tx is muted.

Both the ONLINE and OFFLINE units receive the satellite traffic, but only the ONLINE unit

forwards traffic to the LAN side while the OFFLINE unit drops the packets.

Any time a unit switches from the OFFLINE to ONLINE state, the traffic destined for the

WAN is buffered, preconfigured in milliseconds (base modem → Antenna Handover

Use the drop-down list to select the MEO Feature operation as Disabled or Enabled, and then

click [Submit] to save this setting.

Antenna Handover

Feature – Use the drop-down list to select the Antenna Handover Feature operation as

Disabled or Enabled.

Mode – Use the drop-down list to select the enabled Antenna Handover Feature switching

operation as Manual or Automatic.

Figure 7-31. Configuration | ANT | SNTP page

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