Most Avaya phones have buttons to which functions can be assigned. For some phones, additional buttons can also be added by attaching a button module to the phone.
Default Buttons and Button Numbering
The default button assignment depends on whether the system's Mode is set as Key or PBX.
•Key Mode
•01-02: Intercom Buttons
The first two buttons are used as Intercom 1 and Intercom 2 buttons for internal calls. This function is automatically assigned to the buttons by the system and cannot be overridden by the system administrator or extension user.
•03+: Line Buttons
Buttons 03 and upwards up to the system's Number of Lines setting are used as line appearance buttons for external calls. These cannot be overridden by the extension user.
•Other Buttons
Any additional buttons can be used for additional functions. These buttons can be programmed by the system administrator and, for some functions, the extension user.
•Button Numbering
All buttons are numbered from 01, from left to right, starting from the bottom row up.
•PBX Mode
•01-03 (ETR 01-02): Call Appearance Buttons
The first three buttons (two only on ETR phones) are used call appearance buttons for making and answering calls. They can be used for both internal and external calls. This function is automatically assigned to the buttons by the system and cannot be overridden by the system administrator or extension user.
•Other Buttons
Any additional buttons can be used for additional functions. These buttons can be programmed by the system administrator and, for some functions, the extension user.
•Button Numbering
All buttons are numbered from 01, from left to right, starting from the bottom row up. However for 1400, 9400 and 9500 Series telephones, buttons are numbered from 01 from left to right, starting from the top row downwards.
Programming a User's Buttons
1.From the menu bar, click User.
2.In the Phone User List, locate the user who you want to edit and click on the View Details link adjacent to their details.
3.On the right is a panel labeled Button Programming. Click on the 
edit icon in the panel.
4.The Program Buttons panel can work in either of two modes. To use it in photo mode, ensure that the Select Handset option is set to the type of telephone the user has. To use it in list mode, set the Select Handset option to Default.
5.Select the button you want to program:
•In photo mode, click on the button in the telephone picture.
•In list mode, click on the button in the list of buttons.
6.The Button Specification panel shows the current settings of the button. You can use this panel to change the button's settings or to change its function.
a.To change the buttons function, click Assign Feature. From the menu that is displayed, select the required function. Some functions require additional information, a menu to enter that information displayed when then is the case.
•Intercom buttons are automatically programmed by the telephone system and cannot be overridden.
•To remove the existing function from a button select Blank.
b.Click OK.
7.After making any changes, select any other button that you want to program.
8.When you have completed programming the user's buttons, click Save.
9.Click << Back to return to the user list and program the buttons for other users.