Instruction manual

Page 1546 of 3156 Flexible Trunk to Trunk Connections
553-3001-306 Standard 10.00 January 2002
• When FTOP = TBFT, Trunk Barring Flexible Trunk to Trunk
Connections, additional restrictions are applied, depending upon the
set’s Class of Service. Trunk to trunk connections barred by TBAR
always remain restricted. Connections not barred by TBAR utilize the
set’s Class of Service.
• When FTOP = FTTB, Flexible Trunk to Trunk Connections Trunk
Barring, Flexible Trunk to Trunk Connections lifts TBAR restrictions for
routes barred by TBAR, based upon the set’s Class of Service. Flexible
Trunk to Trunk Connections does not apply any new restrictions for non-
barred routes.
• When FTOP = FTLY, Flexible Trunk to Trunk Connections Only, trunk
to trunk connections for Transfer or Conference that are on barred and
non-barred routes are controlled exclusively by the Flexible Trunk to
Trunk Connections feature.
The Flexible Trunk to Trunk Connections feature provides the same Class of
Service options at a set level with or without Trunk Barring configured.
(CLS = FTTU, FTTR, FTTC).
Flexible Trunk to Trunk Connections Options (FTOP) = Trunk
Barring Flexible Trunk to Trunk Connections (TBFT)
Figure 44 illustrates Flexible Trunk to Trunk Connections functionality with
Trunk Barring configured and FTOP set to TBFT in Overlay 15.
In Figure 44, B is established on a call with Trunk Route 1. Trunk Routes 1
and 2 are not barred by TBAR, but Trunk Routes 3 and 4 are barred
connection to any other route. Trunk Routes 1, 2, 3, and 4 are both incoming
and outgoing.
Referring to Figure 44, when Flexible Trunk to Trunk Connections Options
is set to Trunk Barring Flexible Trunk to Trunk Connections (TBFT) and the
Class of Service of B is set to Flexible Trunk to Trunk Connections
Unrestricted (FTTU), the following is true:
• B can complete the Call Transfer between Trunk Routes 1 and 2.