Installation and initial configuration of an IP Telephony node Page 347 of 910
IP Line Description, Installation and Maintenance
Figure 76
Delete VGW channels window
End of Procedure

Configure virtual superloops for IP Phones

One or more virtual superloops must be configured to support IP Phone
Virtual TNs (VTNs) in LD 97 or in Element Manager. To create the virtual
superloop in Element Manager, click System > Superloops in the Element
Manager navigator.
Large Systems and CS 1000E
In Large Systems and CS 1000E, virtual superloops contend for the same
range of loops with phantom, standard and remote superloops, digital trunk
loops, and all service loops. Virtual superloops can reside in
physically-equipped network groups or in virtual network groups.