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The SIP-T42G is an open-SIP-based IP desktop phone which is compatible with Microsoft® Skype for Business and Office 365. Skype for Business functions include conferencing, Boss/Admin, Common Area Phone and Calendar in Outlook. 

The wireless “Better Together over Ethernet” (BToE) feature enables seamless switching between Skype for Business desktop-client and BT phones. 

Thanks to its Optima HD Voice technology, users enjoy conversations in lifelike, crystal-clear audio. 





2.7” 192x64 pixel backlit LCD

Modern Skype for Business User Interface 

Intelligent Directory Search

Synchronised Outlook Calendar with meeting “Join” feature

Common Area Phone

Boss/Admin support

Dual-port Gigabit Ethernet

PoE support

Headset Electronic Hook Switch (EHS) support



YHS32 Headset lightweight over the-head monaural headset

Audio features:

Optima HD voice: HD handset, HD speaker, Full-duplex hands-free speakerphone with AEC, Codecs: G.722 (Wideband), G.711 (A/μ), G.723, G.729AB, G.726, GSM, iLBC, DTMF: In-band, Out-of-band (RFC 2833) and SIP INFO, VAD, CNG, AEC, PLC, AJB, AGC


Contacts synchronize with client, View SFB contacts and their current presence status, Support local contacts, Support Global search, Compatible with exchange, Smart dialing, Call history: placed/received/missed/forwarded 

Signing into Microsoft:

Sign in PIN Authentication/User credentials, Signing in via BToE, Signing in via web user interface, Auto root certificate fetch

BToE features:

Click to call/Click to answer, Audio device switch from IP Phone to PC, wireless pairing with PC client, As a PC Audio device 

Phone features:

Presence status synchronize with client, Reset presence status, Privacy mode, Phone Lock, Favourite contacts sorting, Favourite contacts click to call, Call hold, call waiting, redial, mute, Branch office support, Support Group, Call pickup, Call forward, call transfer, call park, SFB conferencing (Microsoft CCCP), Boss/ Admin function, Common Area Phone (CAP), Calendar function, Outlook meeting schedules synchronization, Paging, Music on hold, E911, Federation, Response group, Private line, Ring tone selection/import/delete, Dial plan, Visual voicemail, Message waiting indicator (MWI), Volume adjustment 


Dual-port Gigabit Ethernet, Power over Ethernet (IEEE 802.3af ) , class 2, 1 x RJ9 (4P4C) handset port, 1 x RJ9 (4P4C) headset port 

Display and indicator:

2.7" 192 x 64-pixel graphical LCD with backlight, LED for call and message waiting indication, National language selection, Caller ID with name, number, Presence status control: available, busy, DND, be right back, off work, appear away

Network and security:

SIP v1 (RFC2543), v2 (RFC3261), IPv4/IPv6, Proxy mode and peer-to-peer SIP link mode, IP Assignment: static/DHCP/PPPoE, DNS Assignment: Static/DHCP, HTTP/HTTPS web server, Time and date synchronization using SNTP, UDP/TCP/DNS-SRV (RFC 3263), QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS, DSCP, SRTP for voice, Transport Layer Security (TLS), EWS authentication, HTTPS certificate manager, Digest authentication using MD5/MD5-sess, IEEE802.1X


Configuration: browser/phone/Auto provisioning, Auto provisioning: RPS/In-band provisioning, In-Band Configuration Management, QoE (Monitoring Reports), Single identity (active directory), Media Bypass, Firewall Traversal, Reset to factory, reboot, Package tracing export, system log, Screenshot via URL, Phone log click to upload, View License status

Other physical features:

External universal AC adapter (optional), AC 100~240V input and DC 5V/1.2A output, Power consumption (PSU): 1.4 ~3.9W, Power consumption (PoE): 2.1 ~5.9W, Dimension(W*D*H*T): 212mm*189mm*175mm*54mm, Operating humidity: 10 ~95%, Operating temperature: -10 ~50°C



Barcode # 6938818300750
Brand Yealink
Shipping Weight 3.5000kg
Shipping Width 0.220m
Shipping Height 0.310m
Shipping Length 0.180m
Shipping Cubic 0.012276000m3
Manufacturer Warranty
1 Year Limited Warranty

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Yealink SIP-T42G-SFB Skype for Business 12 Line SIP telephone

Dual Gigabit, Color Display IP Phone 2.7''

  • SKU: SFB-T41S

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