3Com SuperStack II PathBuilder S330 Reference Manual page 147

2 Select [2] Add Virtual Circuit. The Add Virtual Circuit screen appears as shown in
Figure 104.
Figure 104 Initial Add Virtual Circuit Screen
3 Enter a description for the virtual circuit you are defining.
We recommend that you do not use the description <366 call>. This is the
default description that the system assigns to video virtual circuits when they are
activated.
A second screen appears. As shown in Figure 105, the description you entered
appears at the top of the screen, and a prompt at the bottom of the screen asks
you to select the virtual circuit class: PVC, RS366 Template, VCM VCC, or VCM
Subchannel. For descriptions of the available VC classes, see "Supported Classes
of Virtual Circuits" earlier in this section.
Figure 105 Selecting the Virtual Circuit Class:
Configuring Virtual Circuits 135