Avaya SBM24-BUTTON avaya 9600 sbm24 button expansion module 700462518 ( - )

Compatibility: IP Office 6.0 to 8.1 - Compatible with Avaya 9630, 9630G, 9640, 9640G, 9650, an 9650C IP telephones. Can add up to 3 SBM24 modules per phone; up to 42 SBM24s per system. IP Office 9.0 or higher - Compatible with Avaya 9608, 9611G, 9630, 9630G, 9640, 9640G, 9641G, 9650, and 9650C IP telephones. Can add up to 3 SBM24 modules per phone; up to 42 SBM24s per system. Avaya Communication Manager R4.0 or higher - Can add up to 3 SBM24 modules per phone Avaya Communication Manager below R4.0 - Support for one SBM24 per phone