Telephone handset interface. Allows you to connect the Duet EXE, Quattro2 DTI, or MT400-DTI, to the Handset Jack of your telephone
The Phoenix Audio Technologies Multi44 Headset and Handset Adapter is an accessory for use with the Duet Executive or Quattro2 DTI. The Multi44 provides a headset input for telephones without one. The buttons allow for switching between Pheonix Audio and telephone signals, and a mute button is also provided.