DK3-33c Economy Elegant design, European which will satisfy all demands of the business office. The DK3-33c is absolute economy. Ideal as an entry level phone the DK3-33c offers the basic features as hook dial, intercom handsfree only, and 10 system keys and can offer the off Hook dial integration with “Dial Off PC” Applications. The DK3-33c series Digital Key phone can used at all Gx Series telephone systems and Hybrid IP Communication systems on a DK port interface. As with all other DK series handsets the DK2-21c utilises single pair wiring making deployment over existing installed cabling simple and painless.