Yealink T48S Gigabit IP Phone (SIP-T48S) | Recertified
SKU: SIP-T48S
This Phone Supports Webex Calling
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Overview for Yealink T48S Gigabit IP Phone (SIP-T48S) | Recertified
The Yealink T48S Gigabit IP Phone (SIP-T48S) is an advanced Gigabit IP phone designed for executives and professionals who require high-performance communication tools. This sleek device has a large 7-inch color touchscreen display that provides an intuitive and responsive interface for easy navigation. The SIP-T48S features Yealink's Optima HD Voice technology, which provides lifelike communication experiences. Its dual-port Gigabit Ethernet design enables rapid call handling and seamless integration with your existing network infrastructure.
This versatile IP phone is compatible with a variety of SIP-based hosted services and IP PBX systems, making it an excellent choice for businesses of any size. The device also supports up to six Yealink EXP40 expansion modules, which are ideal for attendant console applications. The SIP-T48S provides flexible power options, including Power over Ethernet (PoE) and the ability to use an AC adapter. The phone's wall-mountable design provides adaptability to different office environments. With its advanced features, elegant design, and user-friendly interface, the Yealink SIP-T48S Gigabit IP Phone is an excellent investment for businesses looking to improve communication and streamline operations.
Key Features of Yealink T48S Gigabit IP Phone
• It features a 7-inch, 800x480-pixel resolution color LCD touchscreen, providing an intuitive and responsive interface.
• The phone can handle up to 16 SIP accounts, making it suitable for managing multiple lines.
• It supports Optima HD Voice (G.722 codec) for crystal-clear audio quality.
• Dual-port Gigabit Ethernet (10/100/1000) ensures fast data transfer and network integration.
• The T48S supports up to 6 Yealink EXP40 expansion modules, ideal for attendant console applications.
• A single USB port allows connection of accessories like headsets, Bluetooth dongles, Wi-Fi dongles, or USB flash drives for call recording.
• It offers 29 programmable keys that can be configured for lines or call features like speed dialing.
• Supports 802.3af Power-over-Ethernet (PoE) and can also be powered via an optional power adapter.
• Includes functions such as call hold, call transfer, busy lamp field, call recording, multicast paging, and conference calling.
• Works with a wide variety of open-source PBX systems, hosted cloud solutions, and platforms like 3CX, Asterisk, Broadsoft, and Genesys
Specifications
Specifications for Yealink T48S Gigabit IP Phone (SIP-T48S) | Recertified
| Manufacturer | Yealink |
| Manufacturer Part Number | SIP-T48S |
| Product Name | Yealink T48S Gigabit IP Phone |
| Product Type | SIP Phone |
| Audio Features | HD voice: HD handset, HD speaker |
| Hearing aid compatible (HAC) handset | |
| Codecs: AMR-WB (optional), AMR-NB (optional), | |
| Opus*, G.722, G.711(A/µ), G.723.1, G.729, G.729A,G.726, iLBC | |
| DTMF: In-band, Out-of-band (RFC 2833) and SIP INFO | |
| Full-duplex hands-free speakerphone with AEC | |
| VAD, CNG, AEC, PLC, AJB, AGC | |
| Phone Features | 16 VoIP accounts |
| Call hold, mute, DND, redial, call return, auto answer | |
| One-touch speed dial, hotline | |
| Call forward, call waiting, call transfer | |
| Group listening, emergency call, 3-way conferencing | |
| Direct IP call without SIP proxy | |
| Ring tone selection/import/delete | |
| Set date time manually or automatically | |
| Dial plan, XML Browser, action URL/URI | |
| RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035) | |
| USB port (2.0 compliant) for: | |
| - Bluetooth earphone through BT40/BT41, | |
| - Contact synchronization through BT40/BT41, | |
| - Wi-Fi through WF40/WF50, | |
| - USB call recording through USB flash drive | |
| USB connectivity to Yealink UH36 headset: | |
| - Basic functions: Answer / end, call mute | |
| - Enhanced function: audio optimization, redial, call | |
| hold, volume synchronization, multiple calls | |
| Enhanced DSS key | |
| Directory | Local phonebook up to 1000 entries |
| Black list | |
| XML/LDAP remote phonebook | |
| Smart dialing | |
| Phonebook search/import/export | |
| Call history: dialed/received/missed/forwarded | |
| IP-PBX Features | |
| Busy Lamp Field (BLF), Bridged Line Apperance (BLA) | |
| Anonymous call, anonymous call rejection | |
| Hot-desking, voice mail, call park, call pickup | |
| Flexible seating, Executive and Assistant | |
| Centralized call recording | |
| Visual voice mail | |
| Call recording | |
| Display and Indicator | 7" 800 x 480-pixel color touch screen with backlight |
| 24 bit depth color | |
| LED for call and message waiting indication | |
| Wallpaper | |
| Intuitive user interface with icons and soft keys | |
| Multilingual user interface | |
| Caller ID with name, number and photo | |
| Screensaver | |
| Power saving | |
| Feature keys | 29 one-touch DSS keys |
| 7 features keys: message, headset, hold, mute, | |
| transfer, redial, hands-free speakerphone | |
| 6 navigation keys | |
| Volume control keys | |
| Illuminated mute key | |
| Illuminated headset key | |
| Illuminated hands-free speakerphone key | |
| Interface | Dual-port Gigabit Ethernet |
| 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 | |
| console application | |
| Other Physical Features | Color: Classic Grey |
| Wall mountable (optional) | |
| External Yealink AC adapter (optional): | |
| AC 100~240V input and DC 5V/2A output | |
| Power consumption (PSU): 2.2-4.9W | |
| Power consumption (PoE): 3.2-7.5W | |
| Dimension (W*D*H*T): | |
| 266mm*226mm*185mm*54mm | |
| Operating humidity: 10~95% | |
| Operating temperature: -10~50°C (+14~122°F) | |
| Management | Configuration: browser/phone/auto-provision |
| Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy | |
| Auto-provision with PnP | |
| Zero-sp-touch, TR-069 | |
| Phone lock for personal privacy protection | |
| Reset to factory, reboot | |
| Package tracing export, system log | |
| Network and Security | SIP v1 (RFC2543), v2 (RFC3261) |
| Call server redundancy supported | |
| NAT traversal: STUN mode | |
| Proxy mode and peer-to-peer SIP link mode | |
| IP assignment: static/DHCP/PPPoE | |
| 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) | |
| HTTPS certificate manager | |
| AES encryption for configuration file | |
| Digest authentication | |
| OpenVPN, IEEE802.1X | |
| IPv6 | |
| LLDP/CDP/DHCP VLAN | |
| ICE |
User Guides
Frequently Asked Questions
Yealink T48S Gigabit IP Phone (SIP-T48S)
Frequently Asked Questions (FAQ's)
What are the main features of the Yealink T48S? The Yealink T48S has a 7-inch touchscreen display, HD voice, Gigabit Ethernet, PoE support, dual-port Gigabit Ethernet, up to 16 VoIP accounts, a USB port for Bluetooth and Wi-Fi, and compatibility with expansion modules.
How do I set up the Yealink T48S for the first time? Connect the handset and headset, then connect the network cable to the LAN port, plug in the power adapter (if not using PoE), and configure the phone settings as instructed on the screen.
Does the Yealink T48S support Wi-Fi? Yes, the Yealink T48S supports Wi-Fi with an optional USB dongle (Yealink WF40/WF50).
Can I use a Bluetooth headset with the Yealink T48S? Yes, the Yealink T48S supports Bluetooth headsets with an optional USB dongle (Yealink BT40/BT41).
How do I configure VoIP accounts on the Yealink T48S? Enter the phone's IP address into a browser to access its web interface, log in with the default credentials, and proceed to the Account tab to configure VoIP account settings.
What is the display resolution of the Yealink T48S touchscreen? The resolution of the 7-inch touchscreen display is 800x480 pixels.
Does the Yealink T48S support PoE (Power over Ethernet)? Yes, the Yealink T48S supports PoE, which eliminates the need for an additional power adapter.
How do I update the firmware on the Yealink T48S? Download the latest firmware from the Yealink website, then launch the phone's web interface, navigate to the Settings tab, select Upgrade, and upload the firmware file.
What codecs does the Yealink T48S support? The Yealink T48S supports various codecs, including G.722, G.711(A/μ), G.723.1, G.729AB, G.726, and iLBC.
How do I reset the Yealink T48S to factory settings? Go to Menu > Settings > Advanced Settings, enter the admin password, select Reset to Factory, and confirm the reset.
Can the Yealink T48S be used with other SIP-based phone systems? Yes, the Yealink T48S is compatible with a variety of SIP-based telephone systems.
What is the warranty period for the Yealink T48S? The Yealink T48S typically has a one-year limited warranty, but this may vary depending on the vendor.
How many VoIP accounts can the Yealink T48S handle? The Yealink T48S supports up to 16 VoIP accounts.
Does the Yealink T48S support expansion modules? Yes, the Yealink T48S can accommodate up to six expansion modules for additional line keys and functionality.
How do I configure the network settings on the Yealink T48S? Navigate to Menu > Settings > Advanced Settings, enter the admin password, and configure the network settings under Network.
What type of Ethernet ports does the Yealink T48S have? The Yealink T48S features dual-port Gigabit Ethernet (10/100/1000 Mbps).
Can the Yealink T48S be wall-mounted? Yes, the Yealink T48S can be wall-mounted with the optional wall mount bracket.
How do I transfer calls on the Yealink T48S? During an active call, press the Transfer soft key, then enter the destination number and press Transfer again.
What is Yealink Optima HD Voice technology? Yealink's Optima HD Voice technology improves call audio quality by utilizing advanced acoustic algorithms and wideband audio codecs.
How do I access the voicemail on the Yealink T48S? To access your voicemail messages, press the Message button on your phone, enter your voicemail password, and then follow the prompts.