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.


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


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.