you live, you learn: RJ45 plug

Forums › LAN (ethernet/Wifi/routers/Bluetooth) › you live, you learn: RJ45 plug

Batman

Mad Scientist
29766 posts

Uber Geek

Trusted

Lifetime subscriber

#205286 7-Nov-2016 14:43

Ok for all the she'll be right dudes out there.

Yesterday I spend all afternoon crimping plugs into my cat6 cable to find that it either doesn't work or gives 10-100Mbps instead of 1Gbps.

Why? Because I thought if it matched all the colours on both ends she'll be right. I thought the cheap 4c plugs and the cheap 3US crimper from china was to blame.

Turns out I had to follow specific colour order. (Which I had done before, following that colour code, with great success).

1 | 2 | 3

6614 posts

Uber Geek
Inactive user

#1665064 7-Nov-2016 15:00

Yes you do

Given they are a twisted pair the interference would have been quite high.

Just to clarify the situation, How many plugs did you crimp into your cat.6 cable? Usually just 2 right ;)

Batman

Mad Scientist
29766 posts

Uber Geek

Trusted

Lifetime subscriber

#1665089 7-Nov-2016 15:35

I don't know how many, my fingers can tell you, ...ok hangon I can't feel them anymore looks like they're sleeping

Spyware

3763 posts

Uber Geek

Lifetime subscriber

#1665094 7-Nov-2016 15:41

Hopefully you're not an electrician.

Spark Max Fibre using Mikrotik CCR1009-8G-1S-1S+, CRS125-24G-1S, Unifi UAP, U6-Pro, UAP-AC-M-Pro, Apple TV 4K (2022), Apple TV 4K (2017), iPad Air 1st gen, iPad Air 4th gen, iPhone 13, SkyNZ3151 (the white box). If it doesn't move then it's data cabled.

Coil

6614 posts

Uber Geek
Inactive user

#1665099 7-Nov-2016 15:45

joker97:

I don't know how many, my fingers can tell you, ...ok hangon I can't feel them anymore looks like they're sleeping

Haham I had a few days like that when i was a sparkie. Left Thumb and right hand numb from twisting and stripping.

ubergeeknz

3344 posts

Uber Geek

Trusted

Vocus

#1665100 7-Nov-2016 15:46

To keep things interesting as well there are 2 colour codes - 568a and b - and if you swap them at each end you get a "Crossover cable"

However, it should still work provided at least one end is gigabit, because GbE interfaces have auto MDIX

Worth noting that if you crimp your own ends there is little chance of testing to Cat 6 - but should be absolutely fine for GbE

Batman

Mad Scientist
29766 posts

Uber Geek

Trusted

Lifetime subscriber

#1665102 7-Nov-2016 15:47

luckily i'm not. luckily however I get to experience proper broadband for the first time! WOW didn't knw what i was missing even with 2X2 ac wifi. the last time I plugged something into the ethernet port for real was when we had ADSL ...

Batman

Mad Scientist
29766 posts

Uber Geek

Trusted

Lifetime subscriber

#1665103 7-Nov-2016 15:48

ubergeeknz:

To keep things interesting as well there are 2 colour codes - 568a and b - and if you swap them at each end you get a "Crossover cable"

However, it should still work provided at least one end is gigabit, because GbE interfaces have auto MDIX

Worth noting that if you crimp your own ends there is little chance of testing to Cat 6 - but should be absolutely fine for GbE

ok. looking at the quality of the last crimp at one end i'd say likely not. the other end looks professional. but since my speedtests show 1ms/920/480Mbps i won't touch it for now ...

Sharesies

Trade NZ and US shares and funds with Sharesies (affiliate link).

Coil

6614 posts

Uber Geek
Inactive user

#1665135 7-Nov-2016 16:02

joker97:

ubergeeknz:

To keep things interesting as well there are 2 colour codes - 568a and b - and if you swap them at each end you get a "Crossover cable"

However, it should still work provided at least one end is gigabit, because GbE interfaces have auto MDIX

Worth noting that if you crimp your own ends there is little chance of testing to Cat 6 - but should be absolutely fine for GbE

ok. looking at the quality of the last crimp at one end i'd say likely not. the other end looks professional. but since my speedtests show 1ms/920/480Mbps i won't touch it for now ...

Over ethernet you would be looking at packet loss and latency over the speed.
A bad crimp can cause an unstable connection on a longer cable.

Im curious on this 920Mb/s speed test. That being an internet speed test?

mattwnz

20164 posts

Uber Geek

#1665142 7-Nov-2016 16:09

Spyware:

Hopefully you're not an electrician.

Networking isn't necessarily a job for an sparky though. Many sparkies probably do it by default, as it involves wires, and people probably don't want to get a specialized network installer in. .

Coil

6614 posts

Uber Geek
Inactive user

#1665150 7-Nov-2016 16:18

mattwnz:

Spyware:

Hopefully you're not an electrician.

Networking isn't necessarily a job for an sparky though. Many sparkies probably do it by default, as it involves wires, and people probably don't want to get a specialized network installer in. .

Yep, Frequently the case. They would rather pay almost twice the price for a sparkie to fumble around with networking that doesnt know much about it.

Given i was trained in IT and worked in it before i was a sparkie i knew how to run Ethernet and build a network.
Frequently working for my old boss and other people they would just run one cat5 cable to TV's and other appliances along side of 230V and other little mistakes that degrade the quality, One of the best ones was people crimping cat5 connectors onto cat6. The copper cores are a different guage and dont crimp well at all.
Another error was that they didnt have a central point for the networks and only run one loop from the ETP. Also not knowing what a master filter was or that you actually need one for VDSL.

ubergeeknz

3344 posts

Uber Geek

Trusted

Vocus

#1665159 7-Nov-2016 16:30

TimA:

One of the best ones was people crimping cat5 connectors onto cat6. The copper cores are a different guage and dont crimp well at all.

Also seen many times, stranded plugs onto solid core cable (or vice versa) - they work for a while but wiggle loose over time and don't make proper contact

DarthKermit

5346 posts

Uber Geek

Trusted

#1665161 7-Nov-2016 16:35

^^^

And don't forget daisy-chaining of the fixed cabling.

Coil

6614 posts

Uber Geek
Inactive user

#1665162 7-Nov-2016 16:36

ubergeeknz:

TimA:

One of the best ones was people crimping cat5 connectors onto cat6. The copper cores are a different guage and dont crimp well at all.

Also seen many times, stranded plugs onto solid core cable (or vice versa) - they work for a while but wiggle loose over time and don't make proper contact

Its even better when you get people who crimp them and the pins dont recess into the plastic block like they should then ram it into an ethernet port and destroy it haha.

Coil

6614 posts

Uber Geek
Inactive user

#1665174 7-Nov-2016 16:48

DarthKermit:

^^^

And don't forget daisy-chaining of the fixed cabling.

The bane of my life.

Trying to explain to fellow sparkies not to daisy chain wiring around the house and run it all back to one point with a punch down panel.

On that topic opticat.. Please always run opticat in urban areas.

DarthKermit

5346 posts

Uber Geek

Trusted

#1665204 7-Nov-2016 16:51

What is opticat?

1 | 2 | 3