With Yealinks Optima HD audio technologies, industry-leading acoustic clarity and newly-added support for Opus to its broad audio codec list, the Yealink T4S guarantees a lifelike collaboration experience. By supporting Opus, Yealink T4S series delivers better audio quality in both high-bandwidth and poor network conditions, comparing to other wideband or narrowband codecs. The cutting-edge design of the Yealink T4S series includes telephony superiority as well as an elegant appearance. The use of premium materials testifies to its manufacturing excellence.
The Yealink T4S series delivers excellent stability and performance with its latest advanced components. The phones feature an optimized interface for a smartphone-like user experience. Its rich one-touch soft keys allow for customization, bringing additional convenience and increasing productivity. In addition to the T46S and the T48S, the new T41S and T42S are equipped with a built-in USB port, meaning the entire T4S series supports extended functions such as USB call recording, Bluetooth and Wi-Fi connectivity for more flexibility and functionalities. The Yealink T4S supports efficient provision and effortless mass deployment with Yealinks free Redirection and Provisioning Service(RPS).
> HD voice: HD handset, HD speaker. > Hearing aid compatible (HAC) handset. > DTMF: In-band, Out-of-band (RFC 2833) and SIP INFO. > Full-duplex hands-free speakerphone with AEC. > VAD, CNG, AEC, PLC, AJB, AGC.
> Call hold, mute, DND. > One-touch speed dial, hotline.
> Call forward, call waiting, call transfer. > Group listening, emergency call. > Redial, call return, auto answer.
> Direct IP call without SIP proxy. > Set date time manually or automatically. > RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035). > USB port (2.0 compliant) for.USB call recording through USB flash drive. > Local phonebook up to 1000 entries. > Busy Lamp Field (BLF). > Bridged Line Apperance (BLA). > Anonymous call, anonymous call rejection. > 7 800 x 480-pixel color touch screen with backlight. > 24 bit depth color. > LED for call and message waiting indication.
> Intuitive user interface with icons and soft keys. > Caller ID with name, number and photo. > 29 one-touch DSS keys.> 7 features keys: message, headset, hold, mute. > Illuminated hands-free speakerphone key. > Power over Ethernet (IEEE 802.3af), class 3. > 1 x USB port (2.0 compliant).
> 1 x RJ9 (4P4C) handset port. > 1 x RJ9 (4P4C) headset port. > 1 x RJ12 (6P6C) EXT port.
Supports up to 6 Expansion Modules for an attendant. > External Yealink AC adapter (optional). AC 100240V input and DC 5V/2A output. > Power consumption (PSU): 2.2-4.9W. > Power consumption (PoE): 3.2-7.5W.> Operating temperature: -1050°C (+14122°F). > Auto provision via FTP/TFTP/HTTP/HTTPS. > Reset to factory, reboot. > Package tracing export, system log. > SIP v1 (RFC2543), v2 (RFC3261). > Call server redundancy supported.
> NAT traversal: STUN mode. > Proxy mode and peer-to-peer SIP link mode. > Time and date synchronization using SNTP. > QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS.> Transport Layer Security (TLS). > AES encryption for configuration file. > Digest authentication using MD5/MD5-sess. Ethernet Cable (2m CAT5E FTP Cable). The item "6 Pack Lot Yealink SIP-T48S SIP Phone 7 Optima Bluetooth Gigabit VoIP 16 Line" is in sale since Thursday, August 29, 2019. This item is in the category "Computers/Tablets & Networking\Enterprise Networking, Servers\VoIP Business Phones/IP PBX". The seller is "speaker-supply" and is located in Austin, Texas. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Brazil, Chile, Colombia, Barbados, Bangladesh, Bolivia, Ecuador, Egypt, Gibraltar, Guadeloupe, Iceland, Jordan, Cayman islands, Sri lanka, Martinique, Maldives, Nicaragua, Peru, Pakistan, Paraguay, Viet nam, Uruguay.