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 is 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.


  • 2.7” color LCD
  • 192 x 64 resolution
  • LCD backlight
  • Wall Mount
  • Adjustable foot stand
  • 1 USB port
  • Dual-port gigabit ethernet
  • Handset Port (RJ-9)
  • Headset Port (RJ-9)
  • AC 100~240V input and DC 5V/1.2A output
  • 6 line key
  • 15 Memory Key (3 pages of 5 keys)
  • Yealink EHS36 Wireless Headset Adapter (Accessory, purchased separately) 
  • Yealink YHS32 Headset (Accessory, purchased separately)
  • Yealink Bluetooth Adapter BT40 (Accessory, purchased separately)  
  • Yealink Wi-Fi Adapter WF40 (Accessory, purchased separately) 
  • USB Recording
  • 3-way Conferencing
  • HD Speaker
  • HD Handset
  • Wide-band Codecs G.722, Opus
  • Narrow-band Codecs G.711(A/µ), G.729A/B, G.726, G.723.1, iLBC, Opus

USB Headset (Accessory, purchased separately)

Vested Networks