Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 509)

Appendix F - Northbound Interface F-11
MN/22156, rev 12 Operational Procedures
receiving Hub demodulator as well. This variable operates much like one of the
cached modem parameters.
To determine the value for this parameter, the VMS searches for an allocation
associated with the specified unit's modulator. If the modulator has an associ-
ated allocation, it queries the first allocated demodulator (which is always at the
Hub) for its last known Eb/No value. If the module does not have an associated
allocation, the value returned is null.
Figure F-6 Demodulator Eb/No Value
The example above shows a single instance of an In-banded Remote switched
into dSCPC with the correlated Hub demodulator's signal link quality.
This next set of OID queries will further demonstrate caching through device
MIB interception, where we step through the objects that represent the dynamic
switch state. Note that, for VMS managed (switched) devices “CDM-840” and
“CDD-880”, there is a separate set of objects that provide the current dynamic
switched state, not to be confused with static state objects. All dynamic OIDs
are labeled with “VS” which signifies Vipersat Switched. An example of this is
shown below in figure F-7.