... , DPT-32DMITELSuperset 4000 Series, Models 4015, 4025, 4125, 4150 Mitel IP Series, Models 5020, 5020i, 5140, 5220 Siemens/ROLM Optiset E ... Series with CA or HA option modulesPolycom SoundPoint IP Phone Series, Models 500 (rev. 5 or later), 600General Electric ... , S12, S50, T10, T20, T50, T100, T110, SP-04, SP-05, PLX-400, PLX-500 T100 call center headset for Plantronics ...