Description
Sound and Hear with Remarkable Clarity
Yealink Optima HD Voice technology combines cutting-edge hardware and software with wideband technology for maximum acoustic performance.
Efficient Deployment and Management
Yealink T4U series supports effortless mass deployment and Zero Touch Provisioning with Yealink’s Redirection and Provisioning Service (RPS) and Boot mechanism, making the device management labor-saving and efficient for the administrators.
Dual USB Ports for Flexible Expansion Choices
Bluetooth/Wi-Fi/Wireless Headset Dongles
With the optional USB dongles, the T42U can be enabled of the features including Bluetooth and Wi-Fi or connecting to a compatible wireless headset.
| Feature |
Feature Value |
| Product type |
IP Phone |
| Product colour |
Grey |
| Handset type |
Wired handset |
| Device lock |
Y |
| Wall mountable |
Y |
| Mounting |
Desk/Wall |
| Caller ID |
Y |
| Phonebook capacity |
100 entries |
| Number of VoIP accounts |
12 |
| Distinctive ring |
Y |
| Speed dialling |
Y |
| Call hold |
Y |
| Call forwarding |
Y |
| Conference call |
Y |
| Redialing |
Y |
| Direct call |
Y |
| Call transfer |
Y |
| Call history |
Y |
| Integrated voicemail |
N |
| Number of programmable keys |
6 |
| Number of function keys |
5 |
| Display |
LCD |
| Display diagonal |
6.86 cm (2.7″) |
| Display resolution |
192 x 68 pixels |
| Microphone mute |
Y |
| Ethernet LAN |
Y |
| Wi-Fi |
Y |
| Bluetooth |
Y |
| Security algorithms |
HTTPS |
| Harmonized System (HS) code |
85171800 |
| USB 2.0 ports quantity |
2 |
| Ethernet LAN (RJ-45) ports |
2 |
| RJ-9 ports quantity |
2 |
| AC adapter input voltage |
100 – 240 V |
| Input frequency |
50/60 Hz |
| AC adapter output voltage |
5 V |
| AC adapter output current |
1.2 A |
| Power consumption (typical) |
2.2 W |
| Operating temperature (T-T) |
-10 – 50 °C |
| Operating relative humidity (H-H) |
10 – 95% |
| Width |
212 mm |
| Depth |
189 mm |
| Height |
175 mm |
| Package width |
627 mm |
| Package depth |
256 mm |
| Package height |
235 mm |
| Package weight |
6.3 g |
