KX-DT543RU, KX-DT546RU - Panasonic Telephone Service Manual (repair manual). Page 18

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• When connecting a headset

The following headsets can be used with this unit. (Not all operations with the headsets can be guaranteed.)
- Wired headsets
  Panasonic KX-TCA400 or KX-TCA430
- EHS headsets

  Selected Plantronics

®

 -brand headsets

For up-to-date information about headsets that have been tested with this unit, please contact your dealer.

• When connecting cords

Ensure the cords are inserted in the grooves, and are clamped to prevent damage to the connectors.