Extend call coverage and capabilities with the AT&T Synapse- Optimizes call handling for those attendants who manage and monitor several simultaneously- Pairs with compatible AT&T Synapse Desksets: SB67030, SB67031, and SB67020- Up to 2 per Deskset, 10 per system- 24 Feature key assignments per expansion module- Busy lamp field BLF – expansion monitoring and/or quick dial up to 48 per deskset- Deskset or wall mounting