3's external 5G what cable to router??

For those on fringes of the 5G area, Three can provide an external device with a flat cable _allegedly_ able to go out a window and then close the window!

I would like to know please, the _exact_ connection type at both ends.

Is the cable _fixed_ to the device or is there a plug and what type?

The end going into router is that RJ45 or what?

thankyou

The manual for the external 5G kit can be found here - https://www.three.co.uk/content/dam/threedigital/pdf...

It describes the port in the modem as an "Ethernet port" so I presume it to be standard RJ45. The (long, flat) cable comes ready fitted to the modem & I've not dismantled mine to see if it is a standard plug on the end (the SIM came pre-installed so I had no need to open the cover & mine is now on a pole above gutter height so I'm afraid I won't be checking it unless I need to for any reason). The other, indoor, end is a standard RJ45 that, as supplied, connects to a PoE adapter & a 2nd Ethernet cable connects to the supplied Eero 6 router (or presumably any other router).

I hope that is of some help.

Edited by bluetroll (Mon 21-Jul-25 21:48:26)

In reply to a post by bradlink:

For those on fringes of the 5G area, Three can provide an external device with a flat cable _allegedly_ able to go out a window and then close the window!

I would like to know please, the _exact_ connection type at both ends.

Is the cable _fixed_ to the device or is there a plug and what type?

The end going into router is that RJ45 or what?

thankyou

It uses standard rj45, and the unit itself is powered by power over ethernet (poe)..

The outdoor unit is connected by a flat RJ-45 cable that passes through a plate which screws into the base of the unit. The screw down plate cannot be separated from the cable and is essential to seal the outdoor unit against moisture so you do have to use the included cable.

The included cable is on a long 6.5 meter reel and you could extend it with an RJ-45 coupler onto more ethernet cable if necessary.

Do note that while Gigabit ethernet is supposed to work with cable runs of up to 100m before needing to pass though a switch, flat cables usually have to compromise the level of shielding compared to standard round cables so you may run into issues extending the cable into a very long run.

To be accurate: there's no shielding in standard Cat5e cable (UTP = Unshielded Twisted Pair)

However, the 8 wires are arranged as four twisted pairs, and the twisting together is important for the way the signals propagate, and also helps with cancellation of interference and cross-talk. Flat cables have the wires laid side-by-side, and so are not suitable for long runs.

Shining a strong backlight through the flat cable on my kit suggests the individual pairs are twisted together but the pairs are side by side, rather than bundled in a round cable outer. I believe the sets of pairs are also twisted round each other in a "normal" round cable.

As I said previously, the flat cable connects to an indoor PoE adapter. So, beyond that, you can use whatever network cables you choose.