Since "PNLc1023" (often printed as PNLX1023 or associated with model numbers like KX-TG47xx/KX-TG40xx) typically refers to a specific rather than the phone model itself, this guide covers the standard procedures for the Panasonic DECT 6.0 cordless phones that utilize this manual.
Since the is not a standalone document, you must use the KX-TG7875 manual. Here are the most common menu functions found on this handset: Panasonic Cordless Phones Manual Pnlc1023