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NEC 1090020 Support Question

NEC 1090020 Support Question

Find answers below for this question about NEC 1090020 - DSX Systems PHONE 22Button Display BK.
Question posted by kgeiger on October 2nd, 2013

Adding An Extension Number To The Programmable Keys

I have a NEC DT300 phone and i'm trying to add another number to my programmable keys, but do not know how. Can you please send me a walkthrough on how to do this.

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