The VB5 Interface
Mick Hale, Alex Gillespie, Keith James · 2001
The VB5 interface is specified similarly to its narrowband cousin V5 in two variants; VB5.1, which supports allocation of resources via the management system; and VB5.2, which adds a mechanism for allocating AN resources under the control of the SN, enabling call-by-call concentration in the AN. Chapter 9 describes the background to the development of VB5, and explains the two variants VB5.1 and VB5.2.