Would this work for optimum 300mbps plan?

Check with the ISP but it should if they support DOCSIS 3.0. Max throughput this modem can handle is 400Mbps.

This ethernet cable is suitable for it: https://www.amazon.com/gp/product/b06xhdt44g

That's a long cable, and I'd recommend a much shorter connection to a router, but it will work.

do I need a router or just a switch will work for Ethernet connections to other computers?

You need a router unless your provider can can give you more IP addresses. Typically, you want to use a router both to allow multiple systems to connect, and to provide added security, since most routers provide firewall functionality.

Does this product have a phone jack?

Cable and power in. Ethernet our. Nothing more

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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CM500

Product ID: 42650296

Details

Brand
NETGEAR
Color
Black or White
Compatible Devices
Personal
Connectivity Technology
Wired
Internet service provider
Xfiniti Cox

⚡680 Mbps max speed

💸Save $168/yr rental fees

🔗16x4 channel bonding DOCSIS 3.0

BZ$414

Duties & taxes included

In stock

Sold byAmazon BelizeDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Upgrade your internet game — faster, smarter, and rental-free!

BLAZING FAST SPEEDS - Experience up to 680 Mbps download speeds, perfect for seamless streaming and remote work.
CERTIFIED TRUSTED - CableLabs certified and compatible with major providers like Xfinity and Cox for hassle-free setup.
CUT THE RENTAL FEES - Own your modem and save up to $168 annually on equipment rental fees.
NEXT GEN DOCSIS 3 0 TECH - 16x4 channel bonding ensures ultra-reliable, high-capacity internet connectivity.
UNIVERSAL ROUTER COMPATIBILITY - Works effortlessly with any WiFi router to power your entire smart home ecosystem.

The NETGEAR CM500 DOCSIS 3.0 Cable Modem delivers high-speed internet up to 680 Mbps with 16x4 channel bonding technology. Compatible with major U.S. cable providers including Xfinity and Cox, it features a single Gigabit Ethernet port and helps users save up to $168 per year by eliminating rental fees. Certified for reliability and easy integration with any WiFi router, this modem is a top choice for professionals seeking fast, stable, and cost-effective internet connectivity.

Specifications

ASIN	B06XH46MWW
Best Sellers Rank	#1,036 in Computers & Accessories ( See Top 100 in Computers & Accessories ) #9 in Computer Networking Modems
Brand	NETGEAR
Built-In Media	Ethernet cable, High Speed Cable Modem—DOCSIS 3.0 (CM500), Power adapter, Quick install guide
Color	Black or White
Compatible Devices	Personal Computer
Connectivity Technology	Wired
Customer Reviews	4.2 4.2 out of 5 stars (14,796)
Data Transfer Rate	680 megabits_per_second
Global Trade Identification Number	00606449127898
Internet Service Provider	Xfiniti, Cox
Item Type Name	Netgear CM500-1AZNAS (16x4) DOCSIS 3.0 Cable Modem, Max download speeds of 680Mbps, Certified for XFINITY
Item Weight	1.5 pounds
Manufacturer	Netgear
Maximum Downstream Data Transfer Rate	343 megabits_per_second
Maximum Upstream Data Transfer Rate	123 megabits_per_second
Mfr Part Number	CM500-1AZNAS
Model Number	CM500-1AZNAS
Modem Type	Cable
Number of Ethernet Ports	1
Number of Items	1
Number of Ports	8
UPC	606449127898
Unit Count	1 Count
Warranty Description	1 Year Warranty

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