TelephoneStuff.com Avaya SBM24 Button Module - Key Expansion Module 700426737

The SBM24 Expansion Module is supported on the 9630, 9640 and 9650 telephones. This module provides 24 additional programmable buttons, which may be configured as call appearances, bridged appearances, or feature keys. The SBM24 Expansion Module is powered from the telephone via the module interface port, so the expansion module does not require a separate power supply.