The addition of button modules allows the phone to support additional programmable buttons.
•Do not connect or disconnect a button module yourself. Your system administrator will arrange this if necessary. Failure to connect and restart the equipment in the correct order may cause the phone and or the button module to function incorrectly.
9508 Phones
These phones support BM12 button modules. Each button module provides the phone with an additional 24 buttons (2 pages of 12) which can be used as appearance buttons and or feature buttons.
Up to three button modules can be attached to each phone. However, the number of button modules supported by the telephone system may be limited by the total number of button modules attached to other phones on the telephone system.
9504 Phones
Phones These phones do not support any additional button modules