A Yealink handset displays 'No service' when it cannot establish contact with Voys. The cause is often a missing network connection or incorrect or unset login credentials.
Check if the base station is connected to the network.
Go to 'Menu→Status'. An IPv4 address is displayed on the screen. Based on what is shown, below are 2 situations described.
IPv4: 0.0.0.0
In this case, the base station did not obtain an IP address from the network. It is not possible to establish a network connection in this situation.
- Check if the network cable is correctly connected to the base station and to the router or modem. Make sure the cable is not damaged and that the connections are secure.
- Check if the router or modem is turned on and correctly configured. You may need to update the settings of your router or modem to allow the base station to connect to the network.
- Try restarting the base station by unplugging the power cord from the outlet and plugging it back in after a few seconds.
IPv4 shows something other than 0.0.0.0. for example: 192.168.1.10
In this case, the base station has received an IP address from the network. Without any other network-level obstacles, the handset could connect to us. It is possible that the account details of the VoIP account are not properly set in the base station.