Sennheiser Electronic Hookswitch for Siemens, Unify, & Aastra Phones

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The Sennheiser Electronic Hookswitch for Siemens Phones connects any Sennheiser wireless office headset to certain Siemens phone models (see below), allowing for remote answering a nd ending of calls without the use of a handset lifter. Call us at 1-800-HEADSETS (1-800-432-3738) to check for compatibility with your phone. Compatible Siemens & Unify phone models: Open Stage 40, 60, and 80, as well as Optipoint 410 (advance, economy, entry), 420, 500, and 600 Compatible Aastra phone models: 5370, 5380, 5370, 5380, 6739i, 6771, 6773, 6775, 6773 IP, 6775 IP, 6867i Show more