Configuration | Meo (Mid-Earth Orbit); Figure 6-32. Configuration | Ant | Sntp Page - Comtech EF Data CDM-625 Installation And Operation Manual

CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.12

Configuration | MEO (Mid-Earth Orbit)

MEO is non-functional when the optional CnC card is installed.
CDM-625 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-625'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
delay).
MEO
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.
• Differential Path Delay – Enter a DPD limit value from -30 to +30.

Figure 6-32. Configuration | ANT | SNTP page

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