Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 243)

Chapter 4 - Configuring Network Modems 4-25
MN/22156, rev 12 Network
Network | WAN | QoS
This menu item appears for CDM-800 and CDM-840 units.
Note: If the Quality of Service feature (FAST code) has not been purchased for
this modem, the QoS menu item will not be displayed.
The QoS menu item is not displayed for receive-only network units such
as the CDD-880 Multi-Receiver Router.
The modulation and coding (ModCod) for the Hub DVB-S2 outbound
carrier groups is specified from the QoS Groups dialog for the CDM-800,
even when the QoS function for the network group is disabled. See
“Network | WAN | QoS | Groups” on page 4-28.
Quality of Service is an optional modem/router feature. The optional QoS capa-
bilities available in each modem/router may be utilized whenever a modem will
be handling high-priority traffic, such as video or voice.
Figure 4-18 Quality of Service dialog, CDM-840
Selecting the QoS (Quality of Service) menu item displays the dialog shown in
figure 4-18. The user may select one of four Modes of QoS operation:
• Off – QoS function is disabled (default).
NOTE