| Model |
Yealink SIP-T42U |
| Display |
4.3-inch (480×272) color LCD |
| Audio |
HD Voice, full-duplex speakerphone |
| Codecs |
G.711(A/U), G.722, G.729, iLBC, OPUS |
| Networking |
2 x 10/100/1000 Ethernet ports (RJ45) |
| Power |
PoE (Power over Ethernet) or DC 5V/1A |
| Connectivity |
1 x RJ9 (Headset), 1 x USB 2.0 |
| Programmable Keys |
6 x programmable keys |
| Line Keys |
8 x line keys (with 21 additional pages) |
| Feature Keys |
Mute, Headset, Redial, Message, Volume Up/Down, Directory |
| Support for Protocols |
SIP (Session Initiation Protocol), IPv4/IPv6 |
| Dimensions |
220mm x 190mm x 48mm (8.7 x 7.5 x 1.9 in) |
| Weight |
0.7 kg (1.54 lbs) |
| Wall Mountable |
Yes, with optional mount kit |
| Additional Features |
Support for VLAN, QoS, SRTP, TLS, HTTPS; 3-way conferencing |
