Mediacom Speed Test

This diagnostic utility validates the throughput of your Mediacom Xtream connection. Most Mediacom customers are on a Coaxial Cable network. This means your internet shares bandwidth with your neighbors. Consequently, you may experience "Node Saturation" (slow speeds) during prime-time hours (7 PM - 11 PM), even if your physical line is healthy.

Understanding Your Speed Metrics

When analyzing your connection integrity, focus on these three performance vectors:

Download Throughput: Mediacom uses "SpeedBoost" technology. A 1 Gig plan often tests at ~940 Mbps to 1.1 Gbps (if you have a 2.5G modem). However, if you see exactly 30 Mbps, check if you have exceeded your monthly data allowance, as you may have been throttled.

Upload Throughput:
• Cable (Standard): Asymmetrical. 1000 Mbps Down / 50 Mbps Up.
• Fiber (Select Areas): Symmetrical. 1000 Mbps Down / 1000 Mbps Up.
If your upload is consistently under 5 Mbps, you likely have "Ingress Noise" on your line caused by a loose coaxial connector.

Latency (Ping): On DOCSIS 3.1, expect 20ms to 40ms. If you see "Jitter" spikes over 100ms, it is often caused by the Intel Puma 6 Chipset found in older modems (like the Arris DG2470 or Hitron Coda). Replacing the modem usually fixes this.

What Results Should You Expect?

The "BYOM" (Bring Your Own Modem) Factor

Your hardware choice is critical on Mediacom's network. Benchmarks include:

Arris S33 / SB8200: The "Gold Standard" for Mediacom. These DOCSIS 3.1 modems support multi-gig speeds. Ensure the status light is Blue (DOCSIS 3.1) and not Green (DOCSIS 3.0).

Technicolor / Hitron (Leased): These gateways are often decent but locked down. You cannot easily change DNS settings to improve browsing speed.

Eero Mesh: Mediacom often bundles Eero routers. If you run a speed test in the Eero app, it measures speed to the router. If that is fast, but your phone is slow, you need to move your Eero nodes closer together.

Why Is Your Mediacom Connection Slow?

Before calling support (1-855-633-4226), verify these common configuration faults:

The "Splitter" Trap: Every splitter drops your signal strength by -3.5dB. If you have a splitter feeding a TV in a spare room you never use, remove it. Your modem should be connected as close to the main line entry point as possible.

Data Cap Overage: Log into your Mediacom account. If you have used 100% of your data allowance, you will be charged $10 per 50GB block, or your speeds may be throttled depending on your contract.

Coax Tightness: The white coaxial cable must be "Wrench Tight" on the back of the modem. Finger-tight is insufficient and allows radio interference (LTE leakage) to kill your connection.

Mediacom Technical Configuration Data

How to Get an Accurate Test

Wireless testing via the Eero system is good, but a wired test is definitive.

To confirm the actual speed delivered to your home, connect a Cat6 Ethernet cable directly from the Modem (bypass the Eero or Router) to a laptop. You must Power Cycle the modem (unplug for 30 seconds) when switching devices to force it to issue a new IP address. If this wired test matches your plan, your line is healthy.

When to Call Support

Escalate the issue to Mediacom support if you observe these specific failures:

Blinking US/DS Light: The modem cannot lock onto the upstream or downstream channels. This usually indicates a line cut or neighborhood outage.

T3/T4 Timeouts: If you access the modem logs (`192.168.100.1`) and see "T3 Timeouts," there is noise on the line that requires a truck roll.

Solid Amber Internet Light: The modem has physical sync but no IP address. This is often a provisioning error on Mediacom's side.

You can check your data usage, pay bills, and troubleshoot via the MediacomMobile App or by calling 1-855-633-4226.