Sennheiser TCI 01 Instructions For Use Manual page 8

Setup
Attention!
Before installing the TCI 01, disconnect your
telephone from the telephone network!
See the diagram below on how to connect the TCI 01 to a
mechanical handset
modular socket is not connected. To power the handset
lifter, either use the mains unit supplied with the handset
lifter or a mains unit from Sennheiser Communications
(available as an accessory).
8
lifter. Please note that the WD Aud