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Plantronics Electronic Hook Switch (EHS) Cord Compatibility Guide for Polycom

Polycom SoundPoint IP 320, 321, 330, 331, 335, 430, 450, 550, 560, 650, 670


Polycom VVX 150, 250, 300, 301, 310, 311, 350, 400, 401, 410, 411, 450, 500, 501, 600, 601, 1500