Yealink SIP-T42S IP

The SIP-T42S IP phone is a dynamic business communications tool for superior voice communications and extended functionality. It has a faster, more responsive interface than the T42G and offers better overall performance.

The SIP-T42S is a 12-line IP Phone with multiple programmable keys for enhancing productivity. It is with Yealink Optima HD Voice Technology and wideband codec of Opus for superb sound quality and crystal clear communications.

What’s more, the SIP-T42S is built with Gigabit Ethernet technology for rapid call handling. Plus, with an all-new USB port, the SIP-T42S boasts unparalleled functionality and expansibility with Bluetooth, Wi-Fi and USB recording features.

The new T4S series offers the same elegant appearance of the T4 line, but with improvements for greater interoperability and collaboration.

! ATTENTION! The Yealink SIP-T42S supports PoE power. The package does not include the mains adapter!
PoE = Power over Ethernet – this is the use of a data cable leading to the IP phone and its power supply.
You can order the network adapter separately.

Product description:
■ 12 SIP accounts
■ 2.7 ”black and white LCD display
■ Optima HD Voice
■ 15 programmable buttons

Data interfaces: Ethernet
Comfort Noise Generator (CNG): Yes
Network services: Fixed IP, DHCP, PPPoE
Call functions: Divert, hold, transfer, 3-way conferencing
NAT: NAT (disabled in default), DHCP server
Caller ID: Yes
QoS DiffServ / ToS / VLAN
Calling plan: Yes
Display type: Black and white
Display – size 2.7
Call waiting (CW): Yes
VoIP standards: SIPv2
Automatic redial: Yes
Codec support: Opus, G.711, G.722, G.723.1, G.726, G.729AB, Dynamic Jitter Buf
Mute: Yes
Peer-to-Peer Mode: Yes
Number of SIP accounts: 12
Open API: XML application, Action URL, Active URI, Push XML
Hands-free calling: Yes
LED status indication: Yes
Ring and call volume settings: Yes
Firmware upgrade: Yes
Number of ringtones: 9
Automatic configuration: Yes
Possibility to record your own ringtones: Yes
IPv6 support: Yes
Date and time display: Yes
Expansion module support: No
Local phone list: 1000
Power adapter: 5V DC, 1.2A (not included)
Remote Phone Lists: XML, LDAP, Broadsoft
PoE consumption: Max. 5.9
Number of programmable buttons: 15
Management: Web, keyboard, car. configuration
Diagnostics: trace, syslog
History – list of incoming calls: 100
History – list of outgoing calls: 100
History – list of missed calls: 100
Dimensions 212 x 189 x 175
Weight: 770
Security: SRTP, TLS (HTTPS, SIPS), login password, encrypted config
Manuals: English instructions
Voice Activity Detection (VAD): Yes
Warranty: 2 years


The product requires professional installation.
Installation and commissioning of the product requires a certain level of knowledge of IT issues, so we recommend entrusting them to qualified professionals.


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