The SIP Phone T77U is the next-gen desk phone with fashion-forward design, AI-empowered audio, enhanced system security, smarter UX and a sustainable approach. The fashion-forward appearance, featuring slimmer body and touchable screen, adapts to modern workspace and provides comfortable hand feel. Empowered by AI Noise Cancellation, optimized Acoustic Shield, and enhanced 3W speaker, it provides ultra clear HD audio. The industry-leading Linux 6.1 and TEE hardware encryption provides enhanced security mechanisms and stronger performance. Built with redesigned UI, it offers easier access to rich functions like Accessibility, Dark Theme and more flexible connectivity. The adoption of green packaging and Power-saving mode adheres to the sustainability goals.
| Design |
|---|
| Mounting |
Desk |
| Backlight keypad |
Yes |
| Product colour |
Black |
| Handset type |
Wired & Wireless handset |
| Product type |
IP Phone |
| Phone features |
|---|
| Caller ID |
Yes |
| Phonebook capacity |
1000 entries |
| Emergency call |
Yes |
| Number of VoIP accounts |
12 |
| Call pick up |
Yes |
| Intercom |
Yes |
| Customizable wallpaper |
Yes |
| Phonebook sharing |
Yes |
| Anonymous call |
Yes |
| Call waiting |
Yes |
| Speed dialling |
Yes |
| Call hold |
Yes |
| Call forwarding |
Yes |
| Conference call |
Yes |
| Redialing |
Yes |
| Message-waiting indicator (MWI) |
Yes |
| Full duplex |
Yes |
| Call park |
Yes |
| Call return |
Yes |
| Call history |
Yes |
| Answering machine |
Yes |
| Management features |
|---|
| Management platform |
Yealink Device Management Platform |
| Volume control |
Buttons |
| Integrated voicemail |
Yes |
| Display |
|---|
| Backlight display |
Yes |
| Touchscreen |
Yes |
| Display resolution |
800 x 480 pixels |
| Display diagonal |
17.8 cm (7") |
| Display |
LCD |
| Audio |
|---|
| Voice codecs |
G.711a, G.711u, G.723.1, G.726, G.729, G.729A, G.729B, G.729ab |
| Microphone mute |
Yes |
| Speakerphone |
Yes |
| Network |
|---|
| Quality of Service (QoS) support |
Yes |
| Syslog |
Yes |
| Security algorithms |
WPA2, WPA3 |
| Ethernet LAN interface type |
Gigabit Ethernet |
| Ethernet LAN data rates |
10,100,1000 Mbit/s |
| Ethernet LAN |
Yes |
| Ports & interfaces |
|---|
| Ethernet LAN (RJ-45) ports |
2 |
| RJ-9 ports quantity |
2 |
| DC-in jack |
Yes |
| USB Type-C ports quantity |
1 |
| USB 2.0 ports quantity |
1 |
| Headset connectivity |
RJ-9 |
| Power |
|---|
| AC adapter output current |
2 A |
| AC adapter output voltage |
5 V |
| AC adapter input voltage |
100 - 240 V |
| Power over Ethernet (PoE) |
Yes |
| Operational conditions |
|---|
| Operating temperature (T-T) |
10 - 45 °C |
| Operating relative humidity (H-H) |
5 - 95% |
| Storage temperature (T-T) |
-30 - 70 °C |
| Weight & dimensions |
|---|
| Package height |
104 mm |
| Package depth |
253 mm |
| Package width |
285 mm |
| Height |
219.2 mm |
| Depth |
167.5 mm |
| Width |
262.1 mm |
| Packaging content |
|---|
| Ethernet cable |
Yes |
| Handset |
Yes |
| Quick start guide |
Yes |
| Number of handles included |
1 pc(s) |
| Mounting kit |
Yes |
