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Why is the wireless signal strength low on my Yealink Telephone?
If the wireless signal strength is low on your Yealink Telephone, ensure the phone and your gateway/router are within the working range and there are no obstructions (walls, doors, etc.) between them.
Why is the LCD screen black on my Yealink Telephone, but the power indicator is on?
If the power indicator LED is on, the keypad is usable but the LCD screen is black on your Yealink Telephone, please reboot your IP phone.
General| VoIP Protocols | SIP |
|---|---|
| PoE Support | Yes (IEEE 802.3af) |
| Headset Port | RJ9 |
| Bluetooth | No |
| Weight | 1.04 kg |
| Display | 4.3" color display with backlight, 480 x 272 pixels |
| Line Keys | 10 line keys |
| Ethernet Ports | 2 x 10/100/1000 Mbps |
| Audio Codecs | G.722, G.711, G.729, G.726, iLBC |
| USB Port | 1 x USB 2.0 |
| Expansion Module Support | Yes, supports up to 6 EXP20 expansion modules |
| EHS | Yes |
| Supported Protocols | SIP |
| Operating Temperature | -10~50°C |
| Humidity | 10% to 95% (non-condensing) |
