Your Yealink SIP-T23P or SIP-T23G phone LCD display shows the message Network Unavailable. There is no dial tone, and you are unable to make or receive calls.

Applies To

Yealink SIP-T23P, Yealink SIP-T23G


Ensure Network Connection

  • Ensure that the Ethernet cable is completely plugged into the Internet port on the phone, and that the Ethernet cable is not loose.
  • Ensure that the switch or hub in your network is operational.
  • Contact your system administrator for more information on properly connecting to your network.


The phone is unable to connect to the network, likely due to cabling or equipment issues.