Description

Specifications
Audio Features

HD voice: HD handset, HD speaker
Hearing aid compatible (HAC) handset
Codecs: Opus, G.722, G.711(A/µ), G.723.1, G.729AB, 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
One-touch speed dial, hotline
Call forward, call waiting, call transfer
Group listening, emergency call
Redial, call return, auto answer
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, Wi-Fi through
WF40, USB call recording through USB flash drive
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
Flexible seating
Call park, call pickup
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

Wall mountable (optional)
External Yealink AC adapter (optional):
AC 100~240V input and DC 5V/2A output
Power consumption (PSU): 2.23-7.29W
Power consumption (PoE): 3.19-10.78W
Dimension (W x D x H x T):
266mm x 226mm x 185mm x 54mm
Operating humidity: 10~95%
Operating temperature: -10~50C
Management

Configuration: browser/phone/autoprovision
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 using MD5/
MD5-sess
OpenVPN, IEEE802.1X
IPv6
LLDP/CDP/DHCP VLAN
ICE
Package Freatures

Package content:
Yealink SIP-T48S IP phone
Handset with handset cord
Ehernet Cable (2m CAT5E UTP Cable)
Stand
Quick Start Guide
Power Adapter (Optional)
Wall Mount Bracket (Optional)
Compliance

WEEE Compliant
ROHS Compliant
Hearing Aid Compatible