Thông số kỹ thuật
| Model | SIP-T42U |
| Operating System | Linux Based |
| Interface | |
| LCD Display | 2.7” 192×64-pixel graphical LCD |
| LCD Type | Fixed |
| LED Indicators | Yes |
| Line Keys | 6 |
| Memory Keys | 15 (3 pages of 5 keys) |
| Expansion Module/ Microphone (Accessory, purchased separately) | Yealink EXP43 |
| Foot Stand | 2 Adjustable Angles |
| Audio Features | |
| HD Voice | HD handset, HD speaker |
| Speakerphone | Full-duplex |
| Wideband Codec | G.722, Opus |
| Narrowband Codec | G.711(A/µ), G.729A/B, G.726,G.723.1, iLBC, Opus |
| HAC Handset | Yes |
| Acoustic Shield | Yes |
| Connectivity | |
| USB Port (2.0 Compliant) | 2 |
| Ethernet Port | Dual-port Gigabit Ethernet |
| Handset Port (RJ-9) | Yes |
| Headset Port (RJ-9) | Yes |
| PoE | Yes |
| Headset | USB Headset |
| Bluetooth | Yes (via BT40/BT41) |
| Wifi | Yes (via WF40/WF50) |
| Wall Mountable | Yes |
| Telephony Features | |
| SIP Accounts | 12 |
| N-way Conferencing | 5-way Conferencing |
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