Comtech EF Data CDM-570/L Vipersat Parameter Editor - Manual (Page 44)

Vipersat
2-28 CDM-570/L, CDD-56X Parameter Editor User Guide
unit demod to operate in SCPC mode and to be available as a resource for dedi-
cated communications with the other end of the satellite link.
Enable VFS
To allow the use of the Vipersat File Streamer with this unit, select the Enable
VFS check box.
Enable Heart Beat
Active for Hub units only.
The Heart Beat feature is a redundancy heart beat message for primary Hub
units that provides the option for a periodic communications check message to
be sent from the Hub modem to the VMS for backup recovery in N:M redun-
dancy (protected) configurations.
Enable SOTM
Active for Hub units only.
The SOTM (Satellite On The Move) feature enables RIPv2 (Routing Informa-
tion Protocol) in forward routes, providing dynamic updates to the routing table.
This allows routing configurations for Remotes to be written by the VMS via
the Hub TDM. When the VMS writes the routes, the TDM unit will generate a
RIPv2 routing update to its default gateway, specifying the new hop router for
the Remote. This will ensure that the edge router has a current table of routes to
all of the remote sites.
In applications utilizing SOTM where multiple TDMs share one router, this
option should be enabled because of the potential that the Hub TDM may
change, and thus the path to the default gateway to the Remote will change as
well. It is not necessary to enable this option when each TDM has its own
router.
Table 2-3 Vipersat unit Network Functions and Roles
Modem/Router Network Function Hub Remote Expansion
Hub Burst Controller providing STDMA Timing
Maps
X
Hub Switched Demodulator X X
Remote STDMA Modem X
Remote Mesh Demodulator X X