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.
Specifications
| Features | |
|---|---|
| Number of programmable keys | 6 |
| Number of function keys | 5 |
| Integrated voicemail | No |
| Handset type | Wireless handset |
| Mounting | Desk/Wall |
| Device lock | Yes |
| Wall mountable | Yes |
| Product colour | Grey |
| Technical details | |
| Number of programmable keys | 6 |
| Number of function keys | 5 |
| Integrated voicemail | No |
| Handset type | Wireless handset |
| Mounting | Desk/Wall |
| Device lock | Yes |
| Direct call | Yes |
| Security | |
| Security algorithms | 256-bit AES, HTTPS, TLS, WPA2, WPA3 |
| Design | |
| Product type | IP Phone |
| Handset type | Wireless handset |
| Mounting | Desk/Wall |
| Device lock | Yes |
| Wall mountable | Yes |
| Product colour | Grey |
| Phone features | |
| Call transfer | Yes |
| Number of VoIP accounts | 12 |
| Speed dialling | Yes |
| Redialing | Yes |
| Phonebook capacity | 1000 entries |
| Full duplex | Yes |
| Do not disturb function | Yes |
| Distinctive ring | Yes |
| Direct call | Yes |
| Conference call | Yes |
| Caller ID | Yes |
| Call waiting | Yes |
| Call pick up | Yes |
| Call park | Yes |
| Call hold | Yes |
| Call forwarding | Yes |
| Anonymous call rejection | Yes |
| Anonymous call | 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 |
| Camera | |
| Rear camera | Yes |
| Network | |
| Networking standards | IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.1x, IEEE 802.3af |
| Ethernet LAN interface type | Gigabit Ethernet |
| Wi-Fi | Yes |
| Supported network protocols | IPv4/IPv6, SIP v1 (RFC2543), v2 (RFC3261), UDP/TCP/DNS-SRV (RFC 3263) |
| Security algorithms | 256-bit AES, HTTPS, TLS, WPA2, WPA3 |
| Quality of Service (QoS) support | Yes |
| Ethernet LAN | Yes |
| Bluetooth | Yes |
| Colour | |
| Product colour | Grey |
| Ergonomics | |
| Wall mountable | Yes |
| Ports & interfaces | |
| USB 2.0 ports quantity | 2 |
| RJ-9 ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 2 |
| Power | |
| AC adapter output current | 1.2 A |
| Power consumption (typical) | 2.2 W |
| Input frequency | 50/60 Hz |
| AC adapter output voltage | 5 V |
| AC adapter input voltage | 100 – 240 V |
| Operational conditions | |
| Operating temperature (T-T) | -10 – 50 °C |
| Operating relative humidity (H-H) | 10 – 95% |
| Weight & dimensions | |
| Width | 212 mm |
| Depth | 189 mm |
| Height | 175 mm |
| Package width | 627 mm |
| Package depth | 256 mm |
| Package height | 235 mm |
| Package weight | 63 kg |
| Packaging content | |
| Number of handles included | 1 pc(s) |
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