AT&T MERLIN LEGEND Release 3.1 System Programming Manual page 379

Basic System Operating Conditions
Mode of Operation
The system mode
system operates and directly affects the following operations:
How lines and/or trunks are provided to users
Types of operator consoles allowed
Features available
Changing this option causes a system restart and terminates the programming
session. You must enter system programming again to program other features.
NOTE:
The Hybrid/PBX option is not available if the control unit processor module has
been modified to operate in Permanent Key mode only. See the Equipment and
Operations Reference .
The following options cannot be programmed for Behind Switch or Key systems:
Automatic Route Selection (ARS)
Pools
Queued Call Consoles (QCCs) and associated features
Direct Inward Dialing (DID) Trunks
System Access buttons
Dial Plan Routing (PRI)
Call by Call Services (PRI)
The Ground-Start lines/trunks option cannot be programmed if the processor
module has been modified for Permanent Key mode operation only.
Summary: Mode of Operation
Programmable by
Mode
Idle Condition
Planning Form
Factory Setting
Valid Entries
Inspect
Copy Option
Console Procedure
PC Procedure
¾
Key, Behind Switch, or Hybrid/PBX
System manager
All
System idle
Form 1, System Planning
Hybrid/PBX
Key, Behind Switch, Hybrid/PBX
No
No
System Mode
Select mode
Select mode
¾
determines how the
Enter
Programming Procedures
4–7