I have connected a 2-wire phone cord to my HP Officejet 4650 all-in-one in the #2 line socket. I have an Xfinity XB6-T internet modem with 2 line sockets , #1 is the phone line coming in, amd the #2 is empty. Can the #2 socket on the XB6-T be used for the fax line, directly connected to the 4650?
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