If you have an RJ-45 then you probably have the TCP/IP protocol or UDP or perhaps some proprietary protocol. A “regular phone” will not speak any of these. Converting to RJ-11 will accomplish nothing. If you see an RJ-11 jack then a “regular phone” will probably work. If you see an RJ-45 jack then you are probably looking at a VoIP phone. This could also be something like an Ooma box that plugs into an RJ-45 jack and then a “regular phone” plugs in the RJ-11 jack on the Ooma box. The OP should work with the appropriate staff at the facility.
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Originally Posted by retiredguy123
Again, why does Amazon sell an adapter that doesn't work? Apparently, the OP's phone system is set up to use a phone. The only way to determine if the adapter works or not is to order one and test it. Neither one of us knows what type of system the OP is referring to.
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