Someone wrote that these only work for 1000Mbps;you would think that they would autoneg. 10/100/etc w/ the switch. Can someone else confirm?

I contacted TP-Link to ask them this question. Version 4 of the product supports 10/100/1000 auto-negotiation. Version 3 and older only supports gigabit.

will this give me better speed? i have 100ft cat6 away from modem and only get 14mb down but 80 when connected closer

Yes and better stability. Switch your cable to cat 7 for better speed. If your willing to spend the money, get a 3ft cat7 cable connect that cable from modem to this converter, get a FO cable for 100 ft run ( they are about $40 to $50 on eBay) connect the cable to a second converter at the end of the run and use a 3ft cat 7 cable to connect to your device. By the way on the back of the converter there is a switch that says auto and force, switch it to force. Auto means if your only going to connect this converter to another device and not to another converter. To learn more, go to YouTube for videos on the installation and use of this great product! Good luck!

What size is the dc barrel connector plug on the power adapter? presumably either 2.1 or 2.5 by 5.5 mm? thx!

I do not know. https://www.tp-link.com/us/products/details/cat-43_MC200CM.html This is the url to the device

Can I go ethernet from my router to multimode then back to ethernet after about 200m without out speed loss?

This media converter is rated for gigabit speed. Multimode fiber used at gigabit speed should be good to about 1,000 meters. So, 200m should be a piece of cake. HTH

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MC200CM Gigabit Ethernet Multi-Mode Media Converter for Desktop (Black)

MC200CM Gigabit Ethernet Multi-Mode Media Converter for Desktop (Black)

Product ID: 76662906

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Details

Brand
TP-Link
Hardware Interface
Ethernet
Colour
Black
Compatible Devices
Desktop
Data Link Protocol
Gigabit
Data Transfer Rate
1000 Megabits

⚡1000Mbps full-duplex speed

📶0.5km fiber extension range

🔄Auto MDI/MDIX for seamless connectivity

Description

🚀 Elevate your network game with lightning-fast, hassle-free fiber connectivity!

EXTENDED FIBER REACH - Boost your network’s range up to 0.5km without compromising speed or stability.
BLAZING GIGABIT SPEED - Experience ultra-fast 1000Mbps full-duplex data transfer for uninterrupted network performance.
FLEXIBLE NETWORK MODES - Switch easily between force and auto transfer modes to optimize your fiber connection.
PLUG PLAY SIMPLICITY - Auto MDI/MDIX support eliminates cable hassles—just connect and go.
INSTANT NETWORK INSIGHTS - Clear LED indicators keep you informed of real-time network status at a glance.

The TP-Link MC200CM is a sleek, black desktop media converter delivering 1000Mbps full-duplex speeds with auto MDI/MDIX support. It extends fiber connections up to 0.5km and features easy-to-read LED indicators for real-time monitoring, making it an essential upgrade for professional-grade, high-speed network setups.

Specifications

Brand	TP-Link
Manufacturer	TP-Link
Series	MC200CM
Colour	Black
Item Height	6.5 Inches
Item Width	2.56 Inches
Product Dimensions	20.4 x 6.5 x 16.51 cm; 408.23 g
Item model number	MC200CM
Voltage	5 Volts
Are Batteries Included	No
Manufacturer	TP-Link
Item Weight	408 g

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