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The TCI 01 - Telephone Interface Box by Sennheiser electronically takes your phone on and off the hook when using a BW or DW series wireless headset system with a phone featuring an electronic hook switch. It is to be used in place of the manual HSL 10 handset lifter.
Electronically takes your phone on and off the hook
Compatible with the BW 900, DW Office and DW Pro1/Pro2
Used as an alternative to the manual HSL 10 handset lifter