Question 1

If ethernet cables have a transmission limitation of 100 m (328 ft), how do the extenders work for 400 ft, 492 ft etc.? Will I need a switch too?

Accepted Answer

Ethernet is a networking protocol. So when you say ethernet cables have a limit of 100m, that limit only applies to the electrical signalling of the ethernet protocol. These extenders don't implement ethernet at all and don't care about the limits or specifications of that protocol. They use the 4 copper pairs in a standard CAT5e/6/7 cable to transmit the HDMI (and some other things) from one end to the other. You cannot connect this to a switch or any other ethernet device. It won't work, and it could potentially blow up or blow up your networking device since it uses a proprietary electrical interface which may push more power than ethernet is designed to accept.

The main confusion here is that people refer to CAT5/5e/6/7 cables as ethernet cables. They are not. They are CAT5/5e/6/7, STP/UTP cables. The CAT number/designation tells you something about the physical properties of the copper cabling inside, and whether or not it is shielded. All of these cables are capable of carrying ethernet, and that is their most common use nowadays, especially for consumers. But at the end of the day, ethernet is just one of many signalling protocols that can be used.

Question 2

Can this device be used only to send RS-232 signal 200' away?  I'm not sure what "passthrough" means?

Accepted Answer

This unit will pass RS232 command from transmitter to receiver up to 200' away.             Jackson      Support Team      J-Tech Digital, Inc

Question 3

Can this do both 4k/60 and 1080p/120?

Accepted Answer

It can do 4K/ @60Hz but not 1080/ @120Hz. Only 1080p/ @60Hz            Jewel      Support Team      J-Tech Digital, Inc

Question 4

Does this product display 4K @ 60 frames per second?

Accepted Answer

Yes, this unit can support 4K @ 60Hz.             Jackson      Support Team      J-Tech Digital, Inc

ASIN	B08L8HJFLS
Aspect Ratio	1.77:1
Audio Output Mode	Surround
Best Sellers Rank	#43,589 in Electronics ( See Top 100 in Electronics ) #47 in Remote Control Extenders
Brand	J-Tech Digital
Built-In Media	User Manual
Color	Black
Compatible Devices	Personal Computer
Connectivity Technology	Ethernet, HDMI
Customer Reviews	4.6 4.6 out of 5 stars (55)
Item Weight	0.91 kg
Manufacturer	J-Tech Digital
Mfr Part Number	JTD-614
Model Number	JTECH-UHDT150
Number of Component Outputs	1
Number of Items	1
Software Update Supported to Date	unknown
Supported Audio Format	Dolby Digital, DTS
Supported Standards	4K, Dolby Digital, DTS, EDID, CEC
Total Number of HDMI Ports	2
Total Usb Ports	1
UPC	850001567893
Unit Count	1 Count
Video Output Resolution	4K UHD (3840x2160)
Voltage	5 volts

J-Tech Digital HDBaseT HDMI Extender over Ethernet, 4K60 394ft, 1080p 492ft

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