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The renewed ARRIS DG3450 is a DOCSIS 3.1 cable modem router combo built for gigabit internet, heavy streaming, and busy multi-device homes. One all-in-one gateway replaces both your rented modem and your WiFi router, ends the monthly equipment fee, and adds MoCA 2.0 support for stable whole-home coax networking. Every unit is tested, restored, and shipped fast from US warehouses, backed by our 90-day full coverage warranty.
The ARRIS DG3450 is approved mainly for Spectrum internet plans. It is also used by regional cable providers such as TDS Telecom. Because it supports both DOCSIS 3.1 and DOCSIS 3.0, it works on standard and gigabit cable plans alike. For provider-specific setup help, see our Spectrum activation guide.
The DG3450 does not work with DSL, fiber (Verizon Fios, AT&T Fiber, Google Fiber), or fixed wireless internet. Before activating, always confirm this model is listed on your provider's approved device page and matches your speed tier.
A gateway like the DG3450 gives you one device, one power outlet, and one setup process, which is the simplest path online for most households. A separate modem and router cost more up front and take up more space, but let you upgrade the WiFi side independently later. If you want simplicity and solid dual-band coverage on a plan up to 1 Gbps, the DG3450 handles both jobs. If you already own a router or mesh system you love, you can still use it: connect it to a LAN port and disable the DG3450's built-in WiFi. For standalone alternatives, see our Best DOCSIS 3.1 Modems of 2026 roundup.
| DOCSIS Version | DOCSIS 3.1 (backward-compatible with 3.0) |
| Max Speed | Gigabit-capable (1 Gbps+, depending on plan) |
| Channel Bonding | OFDM/OFDMA (3.1) plus 32x8 SC-QAM (3.0) |
| WiFi | Dual-band 2.4 GHz and 5 GHz, 802.11ac Wave 2 |
| Ethernet Ports | 4x Gigabit Ethernet LAN |
| MoCA | MoCA 2.0 (coax backhaul, adapters sold separately) |
| Security | WPA2/WPA3, SPI firewall, NAT |
| Best For Plans | Up to 1 Gbps cable internet |
| Dimensions | Approx. 9.3 x 2.9 x 8.0 in |
Xfinity, Cox, and Spectrum all supply gateway equipment, and where a rental fee applies it typically runs $10 to $15 per month. At $180 a year on the high end, this renewed DG3450 pays for itself in about six months, and everything after that is savings. Some providers have reduced or bundled their fees, so check your current bill to see exactly what you are paying. If your rented gateway is aging or acting up, our guide on how long modems last covers the signs it is time to replace it.
Coaxial cable, MoCA adapters, and splitters are not included and are typically supplied by your ISP or sold separately.
If the lights keep blinking or the online indicator never goes solid, our Arris modem lights guide explains what each light means and how to fix common connection issues.
Yes. The DG3450 is DOCSIS 3.1 and supports Xfinity gigabit plans where it appears on Xfinity's approved modem list. It also works on lower-speed Xfinity tiers thanks to DOCSIS 3.0 backward compatibility.
Yes. The DG3450 is a modem router combo, also called a gateway. It includes a built-in dual-band WiFi router, so you do not need a separate router unless you want to add a mesh system or use your own preferred router.
The DG3450 is a gateway model deployed by TDS Telecom on its cable internet plans. If you are a TDS customer, confirm the DG3450 is approved for your specific plan and area before activating.
Yes. You can disable the built-in WiFi and connect your own router or mesh system to one of the gigabit LAN ports. Bridge mode availability depends on your ISP's firmware configuration. For pairing options, see our Best WiFi Routers for Gigabit Internet guide.
MoCA 2.0 lets you run a high-speed wired network over your existing coaxial cable lines, which is useful for rooms where WiFi is weak. You only need MoCA if you plan to hardwire devices over coax, and you will need a MoCA 2.0 adapter at the other end.
No. The DG3450 uses 802.11ac (WiFi 5) Wave 2 dual-band WiFi. If you need WiFi 6 or WiFi 6E, pair the DG3450 in bridge mode with a WiFi 6 router or mesh system.
Blinking lights during boot are normal for the first 5 to 10 minutes. After activation, the power and online lights should be solid. Persistent blinking usually points to a coax signal issue or an activation that has not completed, and our Arris modem lights guide walks through the fixes.
This DG3450 is a Renewed (refurbished) unit. Each gateway is professionally inspected, tested, and restored to working condition, then backed by a 90-day full coverage warranty.
Most orders ship the same or next business day from our nearest US warehouse and arrive in 1 to 3 business days. You will receive tracking as soon as your order is on the way.
If anything goes wrong within the first 90 days, contact our USA-based support team and we will troubleshoot, replace, or refund. We stand behind every modem we ship.
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