• Provides 24 additional lines for incoming calls, outgoing calls, and calling features
• No separate power supply needed. However, using more than one button module changes the power class of the phone to Class 3

• 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

The Avaya SBM24 Button Module extends the amount of call appearances and feature buttons on your telephone. Typical uses for the Avaya SBM24 Button Module are providing additional lines for bridging, abbreviated dialing buttons, and access to features like call forwarding.