Comtech EF Data Vipersat Circuit Scheduler v3.7.x ArrangeLink - Manual (Page 58)

Schedule Setup
3-16 ArrangeLink User Guide
InBand Circuit
An InBand circuit refers to a circuit which has its control channel within the
same band as the communication channels. In figure 3-16, SCPC and STDMA
In-Band circuits are shown for a Vipersat network using CDM-570L modem/
routers.
Figure 3-16 InBand Circuit diagram
This type of connection applies to circuits which utilize Comtech EF Data
modem devices containing an integral IP router (Viperized).
Out-of-Band Circuit
An Out-of-Band circuit applies when a configuration similar to the one shown
in figure 3-17 is used to establish a high-speed data link between non-Vipersat
units such as the CDM-600L and its companion CiM-25 IP module. The
management and control commands from the VMS are transmitted and received
InBand by the CDM-570L circuit. These commands are then routed by the
CDM-570L over Ethernet to the CDM-600L modem.
Since the management and control signals are handled by the CDM-570L
within its allocated bandwidth and do not occupy any of the CDM-600L’s band-
width, these command circuits are considered Out-of-Band with respect to the
CDM-600L circuit.