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Products 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.
| Design | |
| Product type: | IP Phone |
| Product colour: | Grey |
| Handset type: | Wireless handset |
| Device lock: | Yes |
| Wall mountable: | Yes |
| Mounting: | Desk/Wall |
| Phone features | |
| Caller ID: | Yes |
| Phonebook capacity: | 1000 entries |
| Number of VoIP accounts: | 12 |
| Call waiting: | Yes |
| Distinctive ring: | Yes |
| Speed dialling: | Yes |
| Call hold: | Yes |
| Call forwarding: | Yes |
| Conference call: | Yes |
| Redialing: | Yes |
| Do not disturb function: | Yes |
| Call park: | Yes |
| Call pick up: | Yes |
| Anonymous call: | Yes |
| Anonymous call rejection: | Yes |
| Full duplex: | Yes |
| Direct call: | Yes |
| Call transfer: | Yes |
| Call history: | Yes |
| Management features | |
| Integrated voicemail: | No |
| Number of programmable keys: | 6 |
| Number of function keys: | 5 |
| Display | |
| Display: | LCD |
| Display diagonal: | 6.86 cm (2.7") |
| Display resolution: | 192 x 68 pixels |
| Camera | |
| Rear camera: | Yes |
| Network | |
| Ethernet LAN: | Yes |
| Wi-Fi: | Yes |
| Bluetooth: | Yes |
| Ethernet LAN interface type: | Gigabit Ethernet |
| 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 |
| Ports & interfaces | |
| USB 2.0 ports quantity: | 2 |
| Ethernet LAN (RJ-45) ports: | 2 |
| RJ-9 ports quantity: | 2 |
| Power | |
| 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 |
| 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) |
Product Safety Information
Responsible Person in the EU:
Yealink Maistrasse 2 82110 Germering Deutschland support@yealink.com
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