Poly Adapter APS-11. Adapter type: EHS Adapter. RJ-45 - RJ-11. Base color: Black. For Unify, Funkwerk, Aastra, Agfeo, Auerswald, elmeg, Swyx, Tiptel. Electronic Hook Switch cable for call control of landline phones (answer/end calls). This cable eliminates the need for an HL10 handset lifter. It works with a variety of landline phones (Siemens, Funkwerk, Auerswald, Agfeo, Aastra, DTeWe) and may also be compatible with devices from other manufacturers. Replacement note: The APS-11 EHS cable replaces the APS-10 cable, and the functions are compatible with Plantronics' Online Indicator accessory. Mobile and flexible thanks to EHS connection. Connect the headset to a phone using Electronic Hook Switch (EHS): This allows you to handle calls solely with the headset without needing to stay close to the phone. Calls will also be signaled directly on the headset. If you are near your phone, you can transfer the ongoing conversation to the regular handset. You do not need mechanical aids, such as a handset lifter, for this.