Why some Telia Routers doesn’t works with Sonos

Newer Sonos products do require a good internet connection and Wi-Fi...the latter being the most important.

If a Router is 5 years or older chances are it may be lacking sufficient Processor Speed and Memory to keep up with the more demanding devices. It may also be that the devices are incapable of receiving new updates via the ISP due to the aforementioned as well.

As far as security protocols are concerned Sonos doesn’t set them. More correctly Sonos updates it equipment to comply with current Wi-Fi security protocols. The WiFi security protocols starting with the newest are:

• WPA3
• WPA3/WPA2 *
• WPA2 **
• WEP ***

WPA stands for WiFi Protected Access

WEP stand s for Wired Equivalent Privacy

Click this link for a list Sonos supported Wi-Fi modes and security standards.

 * This protocol is recommended wherein a network is comprised of older devices as well as more up-to-date ones

 ** This protocol while useable is less secure

 *** This security protocol is outdated and can place your network at high risk

No. Sonos’ official requirements are pretty modest: in general terms a stable router that provides 2.4 GHz Wi‑Fi (5ghz if your devices support it) all devices on the same subnet. Basically standard consumer gear.

Sonos traffic is low‑bandwidth compared with 4K streaming or gaming so what it really needs is low interference, correct band support, and decent multicast/broadcast handling (not a high‑end router with a strong CPU) 

That said older/cheaper routers can struggle with lots of concurrent wireless devices, QoS features, parental controls, and multiple streams, which can indirectly causes Sonos dropouts, timeouts, or discovery issues.

If your router is 5+ years old, it could have wireless, firmware, and/or capacity limitations that can show up as problems with Sonos so it could be worth evaluating or replacing it. 

I don’t know where the above answer was gleamed from (AI maybe)..however, Sonos has upgraded it’s Security protocols (WPA3) and also supports 802.11ac (WiFi 5), 802.11ax (WiFi 6) WiFi standards. Click the link in my previous post.

You appear to be unaware that Sonos devices that support WPA3 also support WPA and WPA2. WPA3 is not mandatory.  

Likewise, Sonos devices with Wi‑Fi 6 capability are backward compatible with Wi‑Fi 4 networks.  
 

I’m very aware of what security protocols Sonos will support. Never said that WPA3 was mandatory nor did I say that Sonos devices that are WiFi 6 capable are  not backward compatible to older networks. In fact I provided a link that lists all security protocols that Sonos will handle and WiFi protocols. So please read my post carefully and stop interjecting references that are not in it.

It is not uncommon for ISP routers in particular to have trouble with Sonos, because they don’t work correctly. They are cost-reduced to allow internet access for client devices, sure, but fall down when required to do other local-network based activities, such as routing between interfaces, or mDNS, or DHCP, all of which Sonos require for a working local system.