Don
Get a tester that lights up on the remote end..
Splinktech Safekom RJ45 CAT7 Cat6e CAT6 Cat5e Cat5 Cat 5e RJ11 RJ12 Network Ethernet UTP STP FTP LAN PC Wire Cable Tester Test Networking Internet Broadband Connection Speed Capability Testing Tool https://www.amazon.co.uk/dp/B015ZT922M/ref=cm_sw_r_cp_apa_i_4yt5Cb1T5Q8BY
Splinktech Safekom RJ45 CAT7 Cat6e CAT6 Cat5e Cat5 Cat 5e RJ11 RJ12 Network Ethernet UTP STP FTP LAN PC Wire Cable Tester Test Networking Internet Broadband Connection Speed Capability Testing Tool https://www.amazon.co.uk/dp/B015ZT922M/ref=cm_sw_r_cp_apa_i_4yt5Cb1T5Q8BY