The Panasonic KX-TD185 adds 4 DID (Direct Inward Dialing) lines.
In order for the card to work, you will require Direct Inward Dialing service from the phone company.
The KX-TD185 works with "dash-three" or later 816 and 1232 phone systems. Only one is used per phone system.
The card is a large module that attaches to the front door, with a flat ribbon cable that goes through the door and plugs into a connector on the front panel of the phone system. Features four-wire jack for connection to the phone company circuit. Three or four-digit extension numbers - Wink or immediate start.
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