Nec Dterm Series i PABX phone.

Supports 16 incoming lines. Can be powered off 27V DC through socket underneath, centre terminal negative. It uses a 24 character by 3 line LCD display. When powered up but not connected to a PABX nothing lights up, but it has a built in self test mode - hold down the * and # keys for ten seconds while applying power, then release the keys after about 10 seconds.

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