2.7.4 Dial Tone TransferDescriptionAn extension assigned as the manager can change the TRS/Barring level (® 2.7.1 Toll Restriction (TRS)/CallBarring (Barring)) for an extension user temporarily. After that, the extension user can make his call.[Example] An extension user can call a manager to release the restriction on outgoing calls (e.g., internationalcalls).(1) Call(2) ChangeTRS/Barring level(3) Make a trunk callToll Restriction/Call Barring buttonManagerGuest Room(Trunk callrestricted)Conditions• The modified TRS/Barring level only applies to the next one call placed at the user’s extension.• Toll Restriction/Call Barring ButtonA manager extension must store the desired TRS/Barring level in the Toll Restriction/Call Barring button.A flexible button can be customised as the Toll Restriction/Call Barring button.PC Programming Manual References12.1.4 PBX Configuration—[4-1-4] Extension—Wired Extension—Flexible Button→ Type→ Parameter Selection (for TRS Level Change)12.2.3 PBX Configuration—[4-2-3] Extension—Portable Station—Flexible Button→ Type→ Parameter Selection (for TRS Level Change)Feature Guide References2.21.2 Flexible ButtonsUser Manual References2.1.3 Restriction Level Control (Dial Tone Transfer)Feature Guide 1292.7.4 Dial Tone Transfer