The T42S is a feature-rich business tool for superior communications and extended functionality, which is ideal for common area use and for staff in the call center. It offers a faster, more-responsive interface than the T42G and several performance-enhancing functions.

The T42S with Yealink Optima HD Voice technology and SILK codec delivers superb audio quality and crystal clear voice communications. Meanwhile, it supports Conferencing, Boss/Admin, Common Area Phone, Calendar, Hot-desking and other productivity-enhancing functions. Its class2 PoE (power over Ethernet) helps to reduce its carbon footprint and its Gigabit Ethernet technology is built for rapid call handling. The model is wall-mountable and can be paired with Yealink YHS32 headset and other major brand headsets via the Yealink EHS36 Wireless Headset Adapter.

• Optima HD Voice
• 2.7" 192 x 64-pixel backlit LCD
• SILK Speech Codec support
• USB 2.0
• Compatible with Office 365
• Calendar, Boss/Admin support
• Common Area Phone
• Meet Now
• QoE (monitoring reports)
• PoE support
• Headset, EHS support
• Wall mountable

Audio features

Yealink Optima HD Voice : HD handset, HD speaker

Full-duplex hands-free speakerphone with AEC

Codecs: SILK, G.722, 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

Directory

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 Skype for Business

Sign in: User Credentials/PIN Authentication

Signing in via BToE

Signing in via web user interface

Web Sign-in

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

Favorite contacts sorting

Favorite contacts click to call

Call hold, call waiting, call merge, redial, mute

Branch office support

Group call pickup

Music on hold

Call forward, call transfer, call park

SFB conferencing (Microsoft CCCP)

Boss/Admin function

Common Area Phone (CAP)

Calendar function, Outlook meeting schedules synchronization

Hot-desking, paging, hotline

E911, Multiple Emergence Number

Federation, response group, private line

Ring tone, dial plan, visual voicemail

Message waiting indicator (MWI)

Volume adjustment

USB port (2.0 compliant):

 - Bluetooth earphone through BT40,

 - Wi-Fi through WF40 (pending),

 - USB call recording through USB flash drive (pending)

Interface

Dual-port Gigabit Ethernet

Power over Ethernet (IEEE 802.3af ) , class 2

1 x USB port (2.0 compliant)

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

Multilingual user interface

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

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

Management

Configuration: browser/phone/Auto provisioning

Yealink Redirection and Provisioning Service (RPS)

Auto Provisioning via Activation Code

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

UnifySquare Device Management

Other physical features

External Yealink AC adapter (optional)： AC 100~240V input and DC 5V/1.2A output

Power consumption (PSU): 1.4-2.8W

Power consumption (PoE): 2.1-3.9W

Dimension (W*D*H*T): 212mm*189mm*175mm*54mm

Operating humidity: 10~95%

Operating temperature: -10~50°C (+14~122°F)

Package features

Package content:

- Yealink T42S Skype for Business Phone

- Handset with handset cord

- Ethernet Cable (2m CAT5E UTP Cable)

- Stand

- Quick Start Guide

- Power Adapter (Optional)

- Wall Mount Bracket (Optional)

Qty/CTN: 5 PCS

N.W/CTN: 6.4 kg

G.W/CTN: 7.0 kg

Giftbox size: 246mm*223mm*120mm

Carton Meas: 627mm*256mm*235mm