Dear @OlleB,

Now, the problem is that the Sonos Port gets latency problems (says the Sonos support) when connected via the TL-SG108E switch, it results in that the music pauses about 10secs every 3-5 minutes.

Try the following suggestion and check if it helps:

1. Ensure the wireless connection is disabled on Sonos system when it connects to the SG108E with an Ethernet cable.

2. Check the cable type you are using, it is recommended to use CAT5e above cable with good quality for the connection.

3. Disconnect other cables/devices to avoid any possible influence, simply connect Router ----SG108E----Sonos to double check it.

4. Connect a PC to the SG108E and try to log into the web UI of SG108E (refer to the QIG if you don't know how to do it),

    1) go to Switching > Port Setting, check whether the Speed/Duplex of the Sonos Port is at 1000MF.

    2) go to QoS > QoS Basic, select QoS mode as 802.1P Based, and specify the Priority Queue for the Sonos Port as 4 for checking.

    3) go to System > System Info, check the current firmware (Build number) and ensure it is up to date.