Yealink SIP-T42U
VoIP phone with caller ID | 5-way call capability | SIP, SIP v2, SRTP | 12 lines | classic gray
Main Specification
| Product Description | Yealink SIP-T42U - VoIP phone with caller ID - 5-way call capability |
|---|---|
| Product Type | VoIP phone with caller ID |
| Main Features | Multiple VoIP protocol support, integrated Ethernet switch |
| VoIP Protocols | SIP, SIP v2, SRTP |
| Voice Codecs | G.722, G.723.1, G.729ab, G.711u, G.711a, G.726, iLBC, Opus |
| Lines Supported | 12 lines |
| Speakerphone | Yes |
| Call Services | Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold, Call park/pickup |
| Display | LCD display - monochrome - Yes |
| Network Ports Qty | 2 x Ethernet 10Base-T/100Base-TX/1000Base-T |
| Body Colour | Classic gray |
General
| Product Type | VoIP phone |
|---|---|
| Body Colour | Classic gray |
Phone Features
| Call Services | Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold, Call park/pickup |
|---|---|
| Caller ID Type | Caller ID |
| Dialer Location | Base |
| Conference Call Capability | 5-way |
| Speakerphone | Yes |
| Volume Control | Yes |
| Indicators | Visual ringer light, voice message waiting indicator |
| Additional Functions | Built-in clock, call recording, redial, mute, HD Voice, auto answer, Do Not Disturb (DND), anonymous call, anonymous call rejection |
IP Telephony
| Main Features | Multiple VoIP protocol support, integrated Ethernet switch |
|---|---|
| VoIP | Yes |
| VoIP Protocols | SIP, SIP v2, SRTP |
| Voice Codecs | G.722, G.723.1, G.729ab, G.711u, G.711a, G.726, iLBC, Opus |
| Lines Supported | 12 lines |
| Quality of Service | IEEE 802.1Q (VLAN), IEEE 802.1p, Type of Service (ToS) |
| IP Address Assignment | DHCP, static |
| Security | IEEE 802.1X, TLS, SRTP |
| Power Over Ethernet (PoE) Support | Yes |
| Network Protocols | IP, TCP, TFTP, UDP, HTTP, DNS, HTTPS, SRTP, TR-069, SNTP, STUN, Lightweight Directory Access Protocol (LDAP) |
| Network Ports Qty | 2 x Ethernet 10Base-T/100Base-TX/1000Base-T |
| Voice Features | Comfort noise generation (CNG), voice activity detection (VAD), HD Voice, acoustic echo cancellation (AEC), packet loss concealment (PLC), adaptive jitter buffer (AJB), automatic gain control (AGC), Yealink Optima HD voice technology |
| Network Features | Network Address Translation (NAT), Class 2 PoE, Lightweight Directory Access Protocol (LDAP) |
Phone Memory
| Phone Directory Capacity | 1000 names & numbers |
|---|
Display
| Type | LCD display - monochrome |
|---|---|
| Display Location | Base |
| Diagonal Size | 2.7" |
| Display Resolution | 192 x 64 pixels |
| Backlit | Yes |
Miscellaneous
| Connections | Headset jack / RJ-9 Handset jack / RJ-9 2 x USB 2 x network / RJ-45 |
|---|---|
| Hearing Aid Compatible | Yes |
| Placing / Mounting | Wall-mountable, table-top |
| Cables Included | Ethernet cable - 2 m |
| Included Accessories | Stand |
Dimensions & Weight (Base)
| Width | 21.2 cm |
|---|---|
| Depth | 18.9 cm |
| Height | 17.5 cm |
Product features
Sound and hear with remarkable clarity
Yealink Optima HD Voice technology combines advanced 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.Key selling points
- 2.7" graphical LCD with backlight
- Optima HD voice with Acoustic Shield basic features
- Up to 12 SIP accounts
- PoE support
- Stand with two adjustable angles, wall mountable
- Wi-Fi via WF40/WF50, Bluetooth via BT41
- Support USB recording
References
MPN: 1301201
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04/06/2026 08:22:06