This feature should only be used during initial system configuration before any other button programming has been performed. If used at any other time, it will override that other button programming.
Use this feature to determine the number of outside lines that should be automatically assigned to buttons on all extensions. For example, entering 06 means that all extensions are assigned lines 01 through 06. For DS and ETR phones, the lines are assigned to the buttons after the intercom (key system mode) or call appearance buttons (PBX system mode). For BST phones the buttons used will depend on the phone model.
•By default the system will assign either 5 lines or, if installed, the number of analog trunks installed when the system is first started.
•You can use this procedure to limit the number of lines that are automatically assigned to all extensions. For example, if there are ten lines connected to the system, you can use this procedure to set the number of lines to eight, so that only the first eight lines are assigned to all system extensions. You can then use Line Assignment to assign lines 9 and 10 to specific extensions.
•To change line assignments without affecting other extensions and settings, use Line Assignment.
•On systems running in key system mode, Automatic Line Selection for all extensions is updated to match the same set of lines in sequence followed by the intercom lines.
•If an extension is assigned as a doorphone extension, its automatic line selection is reset to select intercom buttons first.
•Key System Mode Only
IP Office Basic Edition systems can be installed in either key or PBX system mode. This feature is only supported by systems running in key system mode. The setting is ignored by systems running in PBX system mode.
1408/1416/9504/9508 Phone
1.At either of the first two extensions on the system, press Admin.
•To do the above during a call, you may need to press the 
PHONE button to display the Admin soft key option. If you access phone administration during a call, only the 
SPEAKER, 
MUTE and 
HEADSET buttons still affect the connected call.
2.Use the 
up or down 
arrow buttons to scroll the display to System Administration. When highlighted, press Select.
3.Use the up or down arrow buttons to scroll the display to System Parameters. When highlighted, press Select.
•Alternatively, dial # and the system administration code.
4.Use the up or down arrow buttons to scroll the display to Number of Lines. When highlighted, press Select.
5.The current setting is displayed.
6.Enter two digits for the number of lines.
•Alternatively use the 
left or right 
arrow icons to toggle through the settings or Default to return to the default setting.
•Exit programming by pressing PHONE. Alternatively use the Back button to move to another menu.
M7324/M7324N/M7310/M7310N/T7316/T7316E Phone
1.At either of the first two extensions on the system, press 
Feature **config (ie. Feature **266344).
•If the system has a system password set, it is requested. Enter the password.
2.The phone displays System Admin.
3.Dial #104.
4.Enter two digits for the number of lines.
•Alternatively use the Next Data or Previous Data buttons to change the setting or press Remove to return to the default setting.
•To exit phone based administration at any time, press the Release button. To select a different process use the Next Procedure or Previous Procedure buttons or dial another feature code.
ETR 18D/ETR 34D Phone
1.At either or the first two extensions on the system, press Feature 0 0 followed by two presses of the first intercom or call appearance button.
2.System Administration: is shown on the display.
3.Dial #104.
4.Enter two digits for the number of outside lines in the system to assign to all extensions.
•Exit programming by pressing Feature 00. You can also exit programming mode by lifting the handset, then placing it back in the cradle.