Speedify Uses a Backup Cable or DSL Connection Alongside Starlink on Windows to Keep You Online
If Starlink is your primary internet on a Windows PC, Speedify can hold a cable or DSL broadband line as an independent ground-based backup that takes over the moment Starlink drops. Speedify uses Speedify’s channel bonding technology to run Starlink and the cable or DSL connection together, so weather, a dish obstruction, or satellite congestion no longer knocks you offline. Your traffic shifts to cable or DSL with no dropped sessions, and when both connections are healthy Speedify bonds them for faster upload and download speeds and encrypts your traffic on both paths.
This guide covers why a cable or DSL line is a strong backup for Starlink on Windows, how Speedify manages both internet connections, and how to set up Speedify in three steps.
Embed Speedify software for the next generation of routers, networking appliances, and smart devices
Speedify Teams
Get faster uploads and downloads and a more reliable internet connection for all the people and devices in your business using the Speedify software app or Powered by Speedify routers.
Speedify for Routers
Power your OpenWRT, GL.iNET, or Miri router with Speedify and combine Wi-Fi, Ethernet, 4G, 5G, Starlink and other satellite internet connections together.
Speedify Embedded Solutions and Integrations
Embed Speedify software into your app or hardware products and leverage the core channel bonding technology of Speedify.
Quick answer
Should you get a backup connection for Starlink?
Yes. Starlink goes down every day — an always-on dish averages about 34 minutes of downtime daily from routine satellite handoffs. A second connection keeps you online when Starlink drops.
What’s the best backup connection for Starlink?
A 4G/5G cellular hotspot or SIM is the most practical backup for most Starlink users — it works anywhere Starlink works, requires no installation, and uses a different network so outages rarely overlap. Cable or DSL broadband is a strong option if you have it at a fixed location. A second Starlink dish is also possible if you need maximum throughput.
How do you use two internet connections at once with Starlink?
Speedify combines Starlink with any other connection — cellular, cable, Wi-Fi, or a second dish — into one bonded connection. Speedify runs on your phone, laptop, or router. When Starlink drops, Speedify moves your traffic to the backup instantly, so calls don’t cut out and downloads don’t stall. Speedify is free to try.
71% of Speedify’s Starlink users already run a second connection. The data below shows why.
Try Speedify free →Speedify Starlink Index — real-world performance from 6,209 Starlink users: 2.4% downtime, about 34 minutes a day for always-on connections
Starlink goes down every day.
Here’s what that actually looks like.
Speedify passively monitors every connection it bonds. These figures come from 6,209 Starlink users over 14 days — compared in real time against the other connections on the same devices. No speed tests, no lab conditions.
Daily downtime
~34 min
2.4% of connected time unreachable
Median latency
60 ms
p90 spikes to 257 ms
Avg packet loss
0.17%
vs 0.08% on T-Mobile
71% ran at least one other connection simultaneously — 4,381 of 6,209 users. Cellular is the most common backup.
Why Combine Starlink Internet with Cable or DSL on Windows
Starlink and cable or DSL broadband run on entirely separate infrastructure. Starlink uses low-Earth-orbit satellites. Cable and DSL use ground-based coaxial cable or telephone line networks maintained by local ISPs. A Starlink outage from weather or satellite congestion will not affect your cable or DSL connection, and a local ISP outage or line issue will not affect Starlink.
Running both through Speedify on your Windows PC means you have two independent paths active at all times. During normal operation, Speedify uses both connections to deliver the combined upload and download capacity of Starlink and cable or DSL. If one drops, the other takes over instantly without any manual intervention on your part.
This setup is especially useful for home offices and small businesses that already pay for a cable or DSL connection and want to add Starlink without losing the reliability of their existing broadband.
How Speedify Manages Starlink and Cable or DSL on Windows
Speedify runs on your Windows PC and monitors your Starlink and cable or DSL connections simultaneously. Speedify tracks latency, packet loss, and available bandwidth on each connection and adjusts traffic distribution in real time.
When both connections are performing well, Speedify routes traffic across both and delivers up to 95% of their combined upload and download capacity. When one connection degrades or goes offline, Speedify shifts all traffic to the remaining connection at the packet level. Active calls, file transfers, and video sessions continue without interruption.
Speedify also encrypts all your internet traffic across both connections, keeping your data protected on every path it takes.
How to Combine Starlink Internet with Cable or DSL on Windows with Speedify
Step 1: Connect to Your Cable or DSL Router
Connect your Windows PC to your cable or DSL router using an Ethernet cable, or connect via Wi-Fi. Confirm the connection is active in your system tray network indicator.
Step 2: Connect to Your Starlink Network
Connect your Windows PC to your Starlink router using a second Ethernet cable, or via Wi-Fi if you are using Ethernet for your cable or DSL connection. If both connections use Wi-Fi, a USB Wi-Fi adapter will be required for one of them.
Step 3: Download and Run Speedify
Download Speedify and install it on your Windows PC. Speedify will detect both active internet connections and start bonding them immediately. No manual routing setup is needed.
Speedify handles everything from that point: combining Starlink and cable or DSL for faster upload and download speeds, monitoring for drops, failing over automatically, and encrypting all traffic.
NEW!
Miri X510 Bonding Router
POWERED BY SPEEDIFY
Bond up to 7 Links Simultaneously
Combine wired, Wi-Fi, 5G, and LTE connections plus Pair & Share with other Speedify users.
Battery-powered Portability
Who Should Use Speedify to Combine Starlink and Cable or DSL on Windows
- Home office workers with both a cable or DSL subscription and Starlink who want to use both for maximum upload and download speed and reliability
- Small businesses using Windows PCs that need a backup internet connection in case their primary broadband goes down
- Content creators and streamers who need the combined upload bandwidth of two separate internet connections
- Anyone in a location where cable or DSL is unreliable and Starlink is a more stable alternative that still needs a backup
- IT teams managing Windows workstations who want software-based bonding and failover without replacing existing router hardware
Speedify Is Used on Millions of Devices Worldwide
Speedify has powered stronger Internet for millions of consumers since 2014
15M
Millions of Speedify downloads worldwide, and growing every day5⭐️
More than 75,000 5-star reviews for Speedify in the iOS and Android app stores82
Points of Speedify presence in datacenters around the globe500TB
Hundreds of terabytes of fast, secure data streamed every week via SpeedifySpeedify Partners
Speedify partners with these amazing organizations to deliver better internet and next-generation networking technology to their customers and employees.
Speedify Also Monitors Your Starlink Dish Status on Windows
Speedify displays real-time Starlink dish alerts in the app dashboard on your Windows PC. If your dish has a stuck actuator motor, a non-vertical mast, or is experiencing thermal throttling, Speedify shows the alert in the app. The alert appears when the condition has persisted for at least 15 seconds and clears once resolved.
Speedify lets you monitor both your internet connections and your Starlink hardware from a single dashboard.
Speedify Business Solutions
Speedify Teams
Speedify for Routers
Speedify Embedded Solutions and Integrations
Embed Speedify software into your app or hardware products and leverage the core channel bonding technology of Speedify in new and interesting ways.