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Network Cabling
RJ45 Inline Couplers
Help extending and joining Ethernet patch leads with RJ45 inline couplers.
34 answers in this range
181 Network Cabling answers
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Practical starting points for this equipment area.
What does an RJ45 inline coupler actually do?
Will an inline coupler slow my network down?
Does a coupler reset the 100 metre Ethernet distance limit?
Why did my Gigabit link drop to 100Mbps after I added the coupler?
Do I need a punchdown tool or any wiring tools to use it?
How many inline couplers can I chain together?
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34 questions in this knowledge range.
Inline coupler basics
Cable & category compatibility
Can I use a Cat5e coupler between two Cat6 cables?
Should I use the Cat3 coupler in a Cat5e or Cat6 network?
Can I connect shielded Ethernet leads through this coupler?
Will the Cat6 coupler work with Cat5e patch leads?
Will the Cat3 coupler accept a normal RJ45 plug?
Can I use the Cat6 coupler with Cat6A cable?
Speed & network performance
Extending cable runs
Does a coupler reset the 100 metre Ethernet distance limit?
How many inline couplers can I chain together?
Can I join two 50 metre patch leads and just call that a 100 metre run?
Does the coupler count as another connection in the Ethernet channel?
Can I use a coupler as an extender or repeater for an overlong cable run?
Connecting & positioning
Why would I choose the Micro coupler instead of the Standard one?
Will this coupler snap into a keystone patch panel or wall plate?
How small are the Micro Cat5e and Cat6 couplers?
Are all of the Standard inline couplers the same size?
Which way round should I connect the two cables?
Can I just leave the coupler hanging behind a cabinet?
Faults & troubleshooting
Why did my Gigabit link drop to 100Mbps after I added the coupler?
I added a coupler and now I have no network connection. What should I check?
The network cuts out when I move the joined cables. Is that normal?
My basic cable tester shows all eight pins connected. Does that prove the joined link is good?
Can the coupler itself be connected backwards?
Does the beige, white or black housing colour change how the coupler works?
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