Plantronics EHS Cable APP-51 38439-11 Polycom for CS500 + Savi - Electronic Hook Switches EHS communicate electronically with your phone giving your wireless headset answer/end and ring alerts remotely. The use of an EHS cable eliminates the need for an HL10 handset lifter. (Formerly 38439-01 - APP-50). Compatible with: CS500 Series (CS510 CS520 CS540) Savi Office (WO100 WO200 WO300 WO350) Savi 700 Series (W710 W720 W730 W730M W740 W740M W745)
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