When you bought the phone system, it was either installed by a professional installer, or you got some sort of instructions. A Panasonic phone system of the TDA/TDE/NCP type rings phones by Incoming Call Distribution Groups (ICD). The main group is 1 and usually is numbered 601. Extensions are members of an ICD group(s) and the number of rings can be programmed for No Ring, Immediate ring, or delayed rings of 1-6.
You can turn off the ringing, but keep in mind that CallerID only displays on a ringing phone or after you answer it. So, if you somehow have access to program 620 and 621, then you can change it from a phone, if not, you'll need access to the maintenance console of your particular phone system.
I don't wish navigating in 620/621 from a phone on my worst enemy and it's beyond the scope of a free forum to instruct you on how it works. I suggest you call your Panasonic service tech.
Carl
Testimonial: "Thanks for that! I'm currently trying to turn off the ringing, do you know how I go about doing that? I contacted Panasonic and they were useless. "
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