Comet 5G KVM: Remote Server Access With Built-In Cellular Failover

Introduction

For IT administrators managing mission-critical servers, network downtime creates a cascading problem. When a production database, phone system, or surveillance server locks up, a KVM device provides local troubleshooting access. But traditional KVM over IP solutions depend entirely on network connectivity. If the internet fails, the network dies, or an upstream switch goes offline, you lose access to the KVM itself and find yourself driving to the data centre at 2 a.m. to diagnose the issue.

The Comet 5G changes this equation by integrating 5G RedCap cellular connectivity directly into the KVM hardware, providing automatic failover when ethernet and Wi-Fi connections drop.

The Problem: Network Dependency in Critical Infrastructure

KVM over IP devices have existed for years, but they all share a fundamental vulnerability: they depend on the network connection they are meant to help you troubleshoot. If your internet goes down, your ISP has an outage, an upstream switch fails, or a router locks up, your KVM becomes unreachable. The ethernet port stays connected, the link state appears normal, but the internet is gone. In these moments, a KVM over IP device offers no help.

This single point of failure has driven IT teams to either accept the risk or build expensive redundant network infrastructure. The Comet 5G addresses this by adding cellular failover as a built-in feature rather than a bolted-on accessory.

Hardware Design and Connectivity

The Comet 5G is a full-featured KVM device with a compact form factor similar to its predecessor, the Slate 7, but with visible differences. Dual antennas extend upward from the rear of the device, used for both Wi-Fi 6 and 5G cellular connectivity. The front features a gorgeous 3.69-inch angled touchscreen display, a departure from the flat-front design of earlier models.

Connectivity options include 4K HDMI pass-through (the KVM sits between the server and monitor), a gigabit ethernet port, USB-C for power, and USB-C for keyboard and mouse emulation to the host server. A USB-A port on the side accepts accessories like the finger bot, which can physically press the power button for hard reboots when remote commands fail.

Internally, the Comet 5G uses the same quad-core Cortex-A53 CPU and 1GB DDR3 RAM as the Comet Pro KVM. It includes 64GB of eMMC storage for file transfers to and from the connected server. The device prioritises connectivity in order: ethernet first, then Wi-Fi, then cellular.

5G RedCap and Use Cases

The integrated 5G connectivity uses RedCap (reduced capability), a flavour of 5G specifically designed for IoT and mid-tier devices. RedCap is faster than Cat 4 LTE but consumes less power than full 5G, making it ideal for always-on KVM devices. AT&T and T-Mobile have both rolled out nationwide RedCap coverage. The Comet 5G is designed to work with RedCap SIMs, though it also accepts standard cellular SIMs.

Several scenarios justify integrated cellular failover. Network redundancy is the primary use case: if ethernet and Wi-Fi both fail, you retain KVM access via cellular. Air-gapped servers that cannot touch the corporate network can now be managed via 5G and Tailscale without compromising security policies. Servers in remote locations, live events, or mobile deployments benefit from KVM access that does not depend on local infrastructure. Finally, network policies that prohibit third-party devices or software can be satisfied by using the KVM’s cellular connection with Tailscale, avoiding direct network integration.

Initial Setup and Configuration

The Comet 5G cannot be configured via 5G during initial setup; you must first connect via ethernet or Wi-Fi to establish the device on your network. Once connected, the touchscreen displays the device’s IP address. Configuration happens through a browser interface identical to the Comet Pro KVM, accessible from any connected device.

To enable 5G connectivity, insert a compatible SIM card into the slot on the device side. The KVM immediately recognises valid SIMs and connects. Network status for all connections (ethernet, Wi-Fi, cellular) is visible in the KVM GUI under Settings > Network Status.

For remote access beyond the local network, Tailscale integration is straightforward: navigate to the App Center, enable Tailscale, click Bind Device, and follow the prompts. Once connected, you can access the KVM through its Tailscale IP from anywhere in the world. GL.iNet has also indicated that native Zerotier integration is on the roadmap. Alternatively, GL.iNet’s KVM Cloud provides similar functionality without requiring a third-party VPN service.

Failover Testing: Ethernet to Cellular Switching

Testing the failover mechanism reveals how the Comet 5G handles real-world network failures. In a controlled test, the device was connected to a network switch that was itself connected to upstream infrastructure. A persistent ping from a remote laptop to the server showed continuous connectivity.

When the upstream switch connection was disconnected, the Comet 5G immediately detected the loss of internet connectivity and switched to the cellular SIM’s IP address. The persistent ping on the server itself stopped (the server lost internet), but remote access via Tailscale through the KVM’s 5G connection remained uninterrupted. The remote laptop could still control the server’s desktop, troubleshoot, and manage the system.

When the upstream switch was reconnected, the Comet 5G automatically switched back to the ethernet IP address within moments. The persistent ping resumed, and continuous remote access was maintained throughout the transition.

Real-World Failover Performance

The critical test is whether the Comet 5G detects upstream connectivity loss when the ethernet link state itself remains active. In production networks, an ISP outage, a failed upstream router, or a switch failure does not always unplug the cable; the port stays connected but no internet flows through it.

The Comet 5G successfully detects these scenarios and fails over to cellular without manual intervention. This is not a simple cable-detection mechanism; it is active monitoring of actual connectivity. The device can distinguish between a connected port with no internet and a truly connected network path, making it reliable for real-world infrastructure failures.

The failover is transparent to remote users connected via Tailscale or KVM Cloud. You continue controlling the server without interruption, even as the underlying network connection switches from ethernet to cellular.

Pricing and Availability

The Comet 5G is scheduled to ship in early March 2026. Early-bird pricing is available at USD 219, with standard pre-order pricing set to USD 239. The final MSRP is USD 299. For that price, you receive integrated 5G RedCap failover, ethernet and Wi-Fi connectivity, 64GB of onboard file storage, Tailscale support, and the touchscreen display.

Conclusion

The Comet 5G solves a genuine problem in mission-critical server management: the dependency of KVM over IP devices on the very network infrastructure they are meant to help troubleshoot. By integrating 5G RedCap cellular failover directly into the hardware, it eliminates the single point of failure that has plagued KVM solutions for years. For IT teams managing remote servers, data centres, or distributed infrastructure, the Comet 5G is a practical investment in reliability and peace of mind.