This is for anyone that might have one at work or anything. Nowhere, can I find how many lines this system supports. Our PBX supports 6, but I can't find anywhere that states this simple (and important) piece of information. I tried Panasonic's website. Nada. I tried Googling. Nada. I tried calling Panasonic. Nada. And my dealer is out of town. Currently, we have three lines, but I'm wondering if we can add more.
tl;dr: How many lines do the KX-T7720 phones support?
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