RJ-45 is the standard connector utilized on 4-pair (8-wire) UTP Unshielded Twisted Pair) cable. It is generally implemented for network and telephone cabling. Sometimes, it's also utilized for serial network connections.
The RJ-45 connector is the standard connector for 10Base-T/100Base-TX Ethernet, ISDN, T1, and modern digital telephone systems. Standard RJ-45 pinouts describe the arrangement of the individual wires required when connecting connectors to a cable. RJ-45 connectors appear similar to the RJ-11 connectors utilized for connecting telephone equipments, but they are a bit wider.
RJ-45 stands for "Registered Jack – 45".
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i wanna connect a solar charge controller ” Tracer 1206 ” with WIFI router and then computer to see status of the charge controller . in user manual this charge controller has RJ45 communication port for a remote meter . but when i asked supplier that it has RJ45 communication port then he answered me like this “RJ45 or TTL-232 together (RJ45 is for physical/mechanical data , TTL-232 is for Electrical data voltage )” i cant understand whats this . please help me to understand about TTL port . thanks in advance