How to Check if Your Yealink Phone Is Connected Properly

If your Yealink phone isn’t working or isn’t showing your extension as active, the most common cause is that the phone is not fully connected to your network or the internet. This guide helps you quickly confirm that the phone is plugged in correctly and connected.

Supported Models

• Desk Phones: T4xS Series (T42S, T46S, T48S), T5xW Series (T53W, T54W, T57W), T7x Series (T73W, T74W, etc.), T8x Series (T83W, T85W, T87W)
• Portable DECT: W53H, W56H, W59R, W73H, W78H
• Portable Wi-Fi Phones: AX83H, AX86R

✅ Step 1: Confirm the Phone Has Power

Your Yealink phone should show signs of power such as:

• Screen backlight
• The Yealink boot logo
• The idle home screen after startup

If the phone does not power on:

If using PoE (Power over Ethernet):

• Make sure the Ethernet cable is firmly plugged into the Internet/LAN port on the phone.
• Ensure the other end is connected to a PoE-capable switch.
• If available, check for link lights on the switch.

If using a power adapter:

• Ensure the power adapter is plugged into the wall outlet.
• Verify the small round connector is fully inserted into the phone.

✅ Step 2: Make Sure the Network Cable Is in the Correct Port

Yealink phones have two Ethernet ports:

• Internet / LAN – This must be used for network connectivity.
• PC – For connecting a computer through the phone (do not use for network input).

Make sure your cable is connected to the Internet/LAN port.

✅ Step 3: Check If the Phone Has an IP Address (No Admin Mode Required)

You can easily check the IP address on all supported Yealink models.

Method 1 (Most Models):
Press the OK button once. The IP address will be shown.

Method 2:
Menu → Status → IPv4

A valid IP address looks like:

• 192.168.x.x
• 10.x.x.x
• 172.16.x.x

If the phone shows:

• 0.0.0.0
• No IP Address
• Unavailable
• Network Unavailable

The phone is not connected to your network.

✅ Step 4: Check the Phone’s Registration Indicator

Desk Phones (T4xS, T5xW, T7x, T8x)

When registered and working:

• The line key is green.
• Your extension name appears.
• The time and date display correctly.
• No warning icons appear in the status bar.
• Calls can be placed normally.

When not registered:

• The line key is grey or blank.
• The phone may show:
  • "Unregistered"
  • "Network Unavailable"
  • "No IP Address"
  • "Initializing…" (stuck)
• Time/date may not appear.
• Calls fail immediately.

Portable DECT Phones (W53H, W56H, W59R, W73H, W78H)

When registered to the base:

• Solid handset icon appears.
• Signal bars displayed.
• Base station name appears (e.g., W70B).
• Calls work normally.

When not registered:

• Flashing or missing handset icon.
• "Searching for Base" or "Not Registered".
• No signal bars.

Portable Wi-Fi Phones (AX83H, AX86R)

• Wi-Fi signal bars should appear.
• Your extension name appears.
• The line key should be green when registered.
• If Wi-Fi signal is missing or line key is grey, the phone is not connected.

✅ Step 5: Try Another Network Port

If the phone has no IP address or shows “Network Unavailable,” try:

• A different port on your switch.
• A different wall jack.
• Connecting directly to your main router.

If it works elsewhere, the issue is with the original port or cable.

✅ Step 6: Restart the Phone

To restart:

• Unplug and replug the Ethernet cable
• OR Menu → Basic → Restart

The phone will reboot and attempt to reconnect.

❗ If Your Phone Still Doesn’t Connect

If your phone still shows no IP address, “Network Unavailable,” or a grey/blank line key, it means the phone is not reaching the internet and there may be an issue on your local network, such as:

• Bad or unplugged cable
• Non-working wall jack
• Switch or router issues
• Firewall blocking the device
• A PoE port with no power

At this point, you may need to contact your local IT support team to ensure your network is allowing the phone to reach the internet.

📞 Need Help?

If you need assistance or want us to verify your phone’s connection attempts, contact PENGUIN Support:

Email: support@callpenguin.com
Phone: 209-585-1375