AT&T MERLIN LEGEND Release 2.0 System Programming Manual page 102

Programming Procedures
Mode of Operation
The system mode — Key, Behind Switch, or Hybrid/PBX — determines how the
system operates, More specifically, the system mode determines:
how lines 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 re-enter system programming to program other features.
NOTE:
The Hybrid/PBX option is not available if the control unit processor module
has been modified with the hardware strap in place to operate in Key mode
only. See Equipment and Operations Reference.
These options cannot be programmed for Behind Switch or Key systems:
Automatic Route Selection (ARS)
P o o l s
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 trunks option cannot be programmed if the processor module
has been modified for Key mode-only operation.
Entering Programming
Console: Select Menu
PC/SPM: Type SPM
Exiting Without Changes
To exit from any screen without making changes, select Exit on the console or
[ F5 ]
press
Sys Program
press any key
on the PC before saving your entry or menu selection.
Exit
[ F1 ] [ F5 ]
Mode of Operation
3-11