Tech specs
Brand
Yealink
Product Line
Yealink
Model
SIP-T44U
Manufacturer
Yealink
IP Address Assignment
DHCP, Static
IP Telephony Network Ports
2 x Ethernet 10Base-T/100Base-TX/1000Base-T
Network Features
12 SIP identities / accounts, Class 2 PoE, ICE, IEEE 802.3af, Lightweight Directory Access Protocol (LDAP), Network Address Translation (NAT) Traversal, STUN
Network Protocols
Cisco Discovery Protocol (CDP), DHCP, DNS SRV, DSCP, FTP, HTTP, HTTPS, IP, IPv6, Lightweight Directory Access Protocol (LDAP), Link Layer Discovery Protocol (LLDP), SNTP, SRTP, STUN, TCP, TFTP, TR-069, UDP, VLAN
Phone Connections
2 x USB, Handset jack / RJ-9, Headset jack / RJ-9
Backlit Display
Yes
Color Support
Color
Display Diagonal Size
2.8 inch
Display Diagonal Size (metric)
7.1 centimetre
Display Languages
Multilingual
Display Location
Base
Display Resolution
320 x 240 pixels
Display Type
LCD display
Indicators & Controls
Busy lamp field (BLF), Call waiting indicator, Voice message waiting indicator
Multiple Conferencing
5-way
Phone Directory Capacity
1000 names & numbers
Speakerphone
Yes
Voice Codec
G.711a, G.711u, G.722, G.723.1, G.726, G.729, G.729A/B, iLBC
Additional Functions
Acoustic Shield Technology, Anonymous call, Anonymous call rejection, Auto answer, Blacklist, Bridged Line Appearance (BLA), Call recording, Do Not Disturb (DND), Emergency call, HD Voice, Mute, Redial, Speed dial memory
Call Services
Call Forwarding, Call Hold, Call park/pickup, Call Transfer, Call Waiting, Caller ID, Voicemail
Caller ID Type
Caller ID
Compatible Software
Yealink Redirection and Provisioning Service (RPS)
Dialer Location
Base
Lines Supported
12 lines
Main Features
Integrated Ethernet switch, Multiple VoIP protocol support
Packaged Quantity
1
Placing/Mounting
Table-top, Wall-mountable
Power Over Ethernet (PoE) Support
Yes
Product Type
VoIP phone
Quality of Service
IEEE 802.1p, IEEE 802.1Q (VLAN), Layer 3 TOS
Security
AES, IEEE 802.1X, SRTP, SSL, TLS
Voice Features
Acoustic echo cancellation (AEC), Adaptive jitter buffer (AJB), Automatic gain control (AGC), Comfort noise generation (CNG), HD audio, HD Voice, Packet loss concealment (PLC), Voice activity detection (VAD), Yealink Optima HD voice technology
VoIP
Yes
VoIP Protocols
RTCP-XR, SIP, SRTP, VQ-RTCPXR
Volume Control
Yes
Cables
Ethernet cable - 2 m
Phone Accessories Included
Stand
Base Depth
20.62 centimetre
Base Height
17.49 centimetre
Base Width
22.49 centimetre
Handset Depth
22.3 centimetre
Handset Height
12 centimetre
Handset Width
24.6 centimetre
Color
Classic gray
Color Category
Gray
ENERGY STAR Certified
No
EPEAT Compliant
No
TCO Certified
No
Hearing Aid Compatible
Yes