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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Gigabit SFP to RJ45 Fiber Media Converter | Fiber to Ethernet Converter

Product ID: 1468725

Details

Brand
TP-Link
Color
Black
Compatible Devices
Desktop Laptop
Data Link Protocol
Ethernet IEEE
Data Transfer Rate
1000 Megabits
Hardware Interface
Ethernet

⚡1 Gbps Full-Duplex Speed

📡550m Fiber Distance

🔌Auto MDI/MDIX Port

$69.23

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Description

🚀 Elevate your network game with lightning-fast, surge-proof fiber conversion!

COMPACT VERSATILE - Standalone design fits anywhere, compatible with TP-Link chassis or solo use.
EXTENDED FIBER REACH - Cover up to 550 meters with multi-mode fiber—perfect for sprawling office setups.
BLAZING GIGABIT SPEED - Experience seamless 1000Mbps full-duplex data transfer for ultra-fast networking.
PLUG PLAY SIMPLICITY - Auto MDI/MDIX ensures hassle-free connection without worrying about cable types.
SURGE RESISTANT DATA LINK - Fiber optic isolation protects your network from electrical surges and lightning strikes.

The TP-Link MC200CM media converter effortlessly bridges 1000BASE-SX fiber and 1000BASE-T copper networks at full gigabit speed. Supporting multi-mode fiber distances up to 550 meters and featuring auto MDI/MDIX ports, it ensures reliable, surge-resistant connectivity ideal for professional environments. Compact and easy to deploy, it’s a trusted solution for extending and protecting your high-speed network infrastructure.

Specifications

ASIN	B003AVRLZI
Best Sellers Rank	#87 in Computer Networking Transceivers
Brand	TP-Link
Built-In Media	Installation Guide, Media Converter MC200CM, Power Adapter
Color	Black
Compatible Devices	Desktop, Laptop
Customer Reviews	4.5 out of 5 stars 233 Reviews
Data Link Protocol	Ethernet , IEEE 802.3
Data Transfer Rate	1000 Megabits Per Second
External Testing Certification	FCC, CE
Hardware Interface	Ethernet
Item Dimensions L x W x H	3.7"L x 2.9"W x 1.1"H
Item Weight	14.4 ounces
Manufacturer	TP-Link
Mfr Part Number	MC200CM
Model Number	MC200CM
Product Dimensions	3.7"L x 2.9"W x 1.1"H
UPC	731215288180 840460604543
Warranty Description	1 year - parts & labor

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