Inter-Tel Model 8560 Digital Speakerphone

Inter-Tel Model 8520 Digital Speakerphone

Inter-Tel Model 8500 Digital Speakerphone

Inter-Tel Model 8450 50 Button DSS/BLF (Direct Station Selection/Busy Lamp Field)

Inter-Tel Model 8416 Mini DSS/BLF (Direct Station Selection/Busy Lamp Field) attached to a Model 8560