Best Seller | App-51 Ehs For Polycom - Pictured - APP-51 electronic hook switch cable for remote desk phone call control (answer/end)- Eliminates the need for an HL10 handset lifter- Works with Polycom desk phones- Compatible Plantronics headsets include Savi 700 series, CS500 series, and Voyager… ... more App-51 Ehs For Polycom - Pictured - APP-51 electronic hook switch cable for remote desk phone call control (answer/end)- Eliminates the need for an HL10 handset lifter- Works with Polycom desk phones- Compatible Plantronics headsets include Savi 700 series, CS500 series, and Voyager… Bed Bath & Beyond | | $93.07 FREE shipping go to store |