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.
| Design |
|---|
| Mounting |
Desk/Wall |
| Wall mountable |
Yes |
| Device lock |
Yes |
| Product colour |
Grey |
| Handset type |
Wireless handset |
| Product type |
IP Phone |
| Phone features |
|---|
| Caller ID |
Yes |
| Phonebook capacity |
1000 entries |
| Number of VoIP accounts |
12 |
| Call pick up |
Yes |
| Anonymous call rejection |
Yes |
| Distinctive ring |
Yes |
| Anonymous call |
Yes |
| Call waiting |
Yes |
| Speed dialling |
Yes |
| Call hold |
Yes |
| Call forwarding |
Yes |
| Conference call |
Yes |
| Redialing |
Yes |
| Do not disturb function |
Yes |
| Full duplex |
Yes |
| Direct call |
Yes |
| Call transfer |
Yes |
| Call park |
Yes |
| Call history |
Yes |
| Management features |
|---|
| Number of programmable keys |
6 |
| Number of function keys |
5 |
| Integrated voicemail |
No |
| Display |
|---|
| Display resolution |
192 x 68 pixels |
| Display diagonal |
6.86 cm (2.7") |
| Display |
LCD |
| Network |
|---|
| Supported network protocols |
IPv4/IPv6, SIP v1 (RFC2543), v2 (RFC3261), UDP/TCP/DNS-SRV (RFC 3263) |
| Quality of Service (QoS) support |
Yes |
| Security algorithms |
256-bit AES, HTTPS, TLS, WPA2, WPA3 |
| Networking standards |
IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.1x, IEEE 802.3af |
| Bluetooth |
Yes |
| Wi-Fi |
Yes |
| Ethernet LAN interface type |
Gigabit Ethernet |
| Ethernet LAN |
Yes |
| Ports & interfaces |
|---|
| Ethernet LAN (RJ-45) ports |
2 |
| RJ-9 ports quantity |
2 |
| USB 2.0 ports quantity |
2 |
| Power |
|---|
| Power consumption (typical) |
2.2 W |
| Operational conditions |
|---|
| Operating temperature (T-T) |
-10 - 50 °C |
| Operating relative humidity (H-H) |
10 - 95% |
| Weight & dimensions |
|---|
| Package weight |
63 kg |
| Package height |
235 mm |
| Package depth |
256 mm |
| Package width |
627 mm |
| Height |
175 mm |
| Depth |
189 mm |
| Width |
212 mm |
| Packaging content |
|---|
| AC adapter included |
No |
| Number of handles included |
1 pc(s) |
