Does this router work with any cable provider?

The spec sheet does not list specific provider compatibility, only that it has a built-in DOCSIS 3.1 cable modem up to 6 Gbit/s. Check with your provider to confirm DOCSIS 3.1 support.

Can I use this with existing mesh Wi-Fi devices from another brand?

No. It uses AVM's own FRITZ! Mesh ecosystem, which is built for AVM devices and does not interoperate with other brands' mesh systems.

Does it support 6 GHz Wi-Fi?

No, this is a dual-band device covering 2.4 GHz and 5 GHz only. It does not include 6 GHz support.

AVM FRITZ!Box 6690 Cable Modem router: UK Prices and Specs

Cable modem router with Wi-Fi 6 and telephony

Updated 11 Oct 2026

AVM FRITZ!Box 6690 Cable 1-pack modem router

£265.54

Price as of 11 Oct 2026, 18:03 UTC

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Overview

The AVM FRITZ!Box 6690 Cable is a cable modem router with built-in DOCSIS 3.1 support up to 6 Gbit/s and Wi-Fi 6 across dual 2.4 and 5 GHz bands. It includes 4 Ethernet ports with speeds up to 2.5 Gbps, a USB port, wired backhaul support, and an integrated DECT base station for telephony.

Who it suits

This router is suited to households on cable internet plans who want a single device handling modem, Wi-Fi 6 routing, and home phone (DECT) duties. It fits users who want wired backhaul options or a 2.5 Gbps port for a fast local device, rather than those needing 6 GHz band support.

Reasons to consider it

The built-in DOCSIS 3.1 modem removes the need for a separate modem on cable connections. Wi-Fi 6 on dual bands plus 4 Ethernet ports (including 2.5 Gbps) supports a mix of wireless and wired devices. The DECT base station adds telephony without extra hardware, and wired backhaul is available for mesh setups.

Limitations and compatibility checks

There is no 6 GHz band, so it only runs dual-band Wi-Fi rather than tri-band Wi-Fi 6E or 7. Mesh expansion is limited to AVM's own FRITZ! Mesh ecosystem, so it won't interoperate with mesh systems from other brands.

Verified specifications

Manufacturer specifications

Wi-Fi generation	Wi-Fi 6
Bands	Dual-band (2.4 + 5 GHz)
6 GHz band	No
Ethernet ports	4
Fastest Ethernet port	2.5 Gbps
PoE support	No
USB	Yes
Wired backhaul	Yes
Ecosystem	AVM FRITZ! Mesh
Power	Built-in DOCSIS 3.1 cable modem up to 6 Gbit/s; DECT base station

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