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Peplink routers offer impressive flexibility and high-performance networking, particularly when optimizing cellular antenna setups. One example of this adaptability is 2×2 Mode—a valuable feature designed for users who need a more compact, simplified antenna configuration without compromising reliability.
In this post, we’ll explain what 2×2 Mode is, why it might be the right choice for certain installations, which Peplink models support it, and how to enable it. We’ll also offer real-world context, troubleshooting tips, and best practices to help you decide when this feature is appropriate.
What is “2×2 Mode”?
Most modern Peplink 5G routers are equipped with 4×4 MIMO (Multiple Input, Multiple Output) capability, which requires four antenna connections—labeled A, B, C, and D—to deliver peak performance and bandwidth. However, in some cases, deploying four antennas might not be practical. This is where 2×2 Mode comes in.
2×2 Mode allows the router to function with just two connected antennas, using a subset of the available antenna ports. This feature was designed specifically for more flexible use cases such as mobile deployments, space-constrained installations, or temporary projects where using four antennas isn’t feasible.
While using only two antennas does reduce available spectrum and bandwidth, enabling 2×2 Mode ensures that your router still maintains a stable, efficient connection—making it a viable option in many deployment scenarios. Note that this feature is only available on 5GH models.
Why Use 2×2 Mode?
Key Benefits
- Compatibility with more antenna setups: Not every antenna on the market or every installation site can support four cables or a 4×4 configuration. 2×2 Mode offers a reliable alternative that fits most 2×2 MIMO antennas.
- Reliable connectivity: Even with fewer antennas, Peplink’s modems are engineered for performance. Users still benefit from MIMO signal processing, reducing interference and increasing throughput compared to single-antenna setups.
- Simplified installation: With fewer cables to manage, installation is easier, faster, and more suitable for non-permanent applications like testing environments or in-vehicle use.
- Lower cost and space requirements: 2×2 MIMO antennas are more compact and often less expensive than 4×4 options, making this a cost-effective solution.
Supported Peplink Models
It’s important to note that not all Peplink routers support 2×2 Mode. As of Firmware 8.3, this feature is only officially supported on Peplink’s “GH” hardware variant models, which include:
- MAX BR1 Pro 5G-5GH
- MAX BR2 Pro 5GH
- Other Peplink 5G models including “-5GH” in their model name
Peplink models ending in “-5GN”, such as the MAX BR2 Pro-5GN, do not support 2×2 Mode due to hardware differences. If you’re unsure which model you have, you can verify it by checking the product label on the bottom of the router or consulting your invoice.
How to Enable and Use 2×2 Mode: Step-by-Step Guide
Step 1: Check Firmware Version
Make sure your Peplink router is running Firmware 8.3 or later, as earlier versions do not offer the 2×2 Mode option. You can check and update your firmware via the local web admin page or through Peplink’s InControl2 platform.
Step 2: Connect Two Antennas
Connect your two cellular antennas to ports A and D (or A and C, depending on your device). These are the ports supported by 2×2 Mode. Leave the other ports (B and C or B and D) disconnected.
Step 3: Enable 2×2 Mode via the Web UI
- Log in to the router’s local admin interface. The default IP address is typically 192.168.50.1, unless changed.
- Navigate to the Dashboard tab.
- Click on the active Cellular WAN interface.
- In the Cellular Details submenu, click the blue question mark icon beside the “Cellular Settings” section.
- A new menu will appear. Click the link:
“If you want to configure cellular WAN antenna, please click ‘here’.” - A new option will appear to “Use Antenna A, D only”. Check this box.
- Scroll to the bottom of the page and click “Save and Apply”.
Step 4: Confirm Operation
Verify the signal strength and bandwidth. While you may notice a slight decrease in performance due to fewer available MIMO streams, the router should still operate reliably in most environments where service is available.
Video Walkthrough
5Gstore has published a video walkthrough for enabling 2×2 Mode on the MAX BR1 Pro 5G, which can be found below:
When Should You Avoid 2×2 Mode?
While 2×2 Mode can be a game-changer for mobile and temporary installations, there are situations where sticking with the full 4×4 configuration is a better choice:
- Enterprise or mission-critical deployments where bandwidth and performance are essential.
- Use cases requiring full band support, especially mid-band and high-band 5G frequencies.
- Installations with available space for rooftop or rack-mounted 4-antenna arrays.
If your project requires the best possible performance across all available bands and minimal latency, a 4×4 MIMO setup is strongly recommended.
Troubleshooting Tips
No “Two Antenna Mode” Option?
- Double-check that the router model ends in “-5GH”
- Update your firmware to version 8.3 or later
Bands Missing After Enabling 2×2 Mode?
Certain frequency bands may be disabled in this mode. If critical bands are missing, consider switching back to 4×4 MIMO or using band selection tools in the admin interface to fine-tune your configuration.
Switching from 2×2 to 4×4 Later?
Peplink makes this process simple. Just disable the “Two Antenna Mode” checkbox and connect the other two antennas. The router will auto-detect the additional ports and reconfigure.
Real-World Example: In-Vehicle Setup
A RV traveler needed to work while traveling and purchased a BR1 Pro 5GH for use on the road. He planned to use his existing Mobility 22G antenna, but did not realize the router supported a full 4×4 MIMO setup. He opted to set the unit to use 2×2 mode until he was done with his trip when he planned to upgrade to the Mobility 42G to support full 5G connectivity. This allowed him to stay connected throughout his trip until he had the time to make the swap. This setup minimized downtime and reduced installation complexity, making 2×2 Mode the ideal choice.
