| Product type | IP Phone |
| Product colour | Grey |
| Handset type | Wired handset |
| Caller ID | Yes |
| Phonebook capacity | 1000 entries |
| Number of VoIP accounts | 16 |
| Call waiting | Yes |
| Call hold | Yes |
| Call forwarding | Yes |
| Conference call | Yes |
| Redialing | Yes |
| Keypad number of keys | 29 |
| Touchscreen | Yes |
| Display | LED |
| Display diagonal | 17.8 cm (7") |
| Display resolution | 800 x 480 pixels |
| Backlight display | Yes |
| Speakerphone | Yes |
| Voice codecs | AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC |
| Ethernet LAN | Yes |
| Wi-Fi | Yes |
| Bluetooth | Yes |
| Ethernet LAN interface type | Gigabit Ethernet |
| Ethernet LAN data rates | 10,100,1000 Mbit/s |
| Security algorithms | AES, HTTPS, SRTP, TLS |
| USB 2.0 ports quantity | 2 |
| Ethernet LAN (RJ-45) ports | 2 |
| Expansion module support | Yes |
| Power over Ethernet (PoE) | Yes |
| AC adapter input voltage | 100 - 240 V |
| Operating temperature (T-T) | 0 - 40 °C |
| Operating relative humidity (H-H) | 10 - 95% |
| Width | 226 mm |
| Depth | 226 mm |
| Height | 185 mm |
| Number of handles included | 1 pc(s) |
| Harmonized System (HS) code | 85171800 |
| Description |
| Yealink SIP-T48U. Product type: IP Phone, Product colour: Grey, Handset type: Wired handset. Phonebook capacity: 1000 entries. Display: LED, Display diagonal: 17.8 cm (7"), Display resolution: 800 x 480 pixels. Voice codecs: AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC. Ethernet LAN interface type: Gigabit Ethernet, Ethernet LAN data rates: 10,100,1000 Mbit/s, Security algorithms: AES, HTTPS, SRTP, TLS |