56 I Service ModesService ModesUsing Service Mode!., you can control how the Norstar systemresponds to calls, depending on the time of day. Up to threedifferent Service Modes can be programmed, each with uniqueringing arrangements.Control telephonesControl telephones are assigned to each external line and areused to control the S e T i c e Mode by allowing you to turn theService Mode ON’& OFF for that line.Use the [I button, the CHRNGE display button, and the dialpad to program the internal number of the Control telephone fore a c h l i n e .P r o g r a m m i n g h i n t sOnly the external lines programmed with a Control telephone canb e p l a c e d i n t o a S e r v i c e M o d e .Modular DR5.1 System Coordinator Guide P O 8 4 2 6 4 7 0 2Service Modes I57You can assign a Control telephone to more than one exteirklline, but a line cannot be assigned to more than one Control’t e l e p h o n e . ,.Only &e Service Mode applies at any one time to all externall i n e s c o n t r o l l e d b y a g i v e n C o n t r o l t e l e p h o n e .T h e d e f a u l t C o n t r o l t e l e p h o n e f o r a l l l i n e s i s 2 2 1Service ModesThe three Service Modes are programmed in the same way.S e r v i c e M o d e N a m eThe Service Mode Name identifies the active Service Mode; andis shown on the display of the Control telephone when the ?Service Mode is turned ON. dUse the [I button, the CHpNGE display button, and the dialpad to program the Service Mode name. For information onentering names, see the information in this chapter entitledEnteringTfiames.Programming hintsThe default names of the three possible Service Modes are onlysuggestions, and may be changed to any other name.A Service Mode name can be one to seven characters.‘Service Mode setting -if-The Service Mode setting controls how the Service Mod&turned ON and OFF. Use the CHFINGE display button to select thesettttg: Manual, Automatic, or OFF.P O 8 4 2 6 4 7 0 2 Modular DR5.1 System Coordinator buide