Yealink SIP-T44U - VoIP phone with caller ID - 5-way call capability - SIP, SRTP, RTCP-XR, VQ-RTCPXR - 12 lines - classic gray

General

Product Type

VoIP phone

Body Colour

Classic gray

Miscellaneous

Cables Included

Ethernet cable - 2 m

Connections

Headset jack / RJ-9 ¦ Handset jack / RJ-9 ¦ 2 x USB

Included Accessories

Stand

Placing / Mounting

Wall-mountable, table-top

Hearing Aid Compatible

Yes

Power

Power Consumption

1.7-4.1 W (PSU), 2.0-4.9 W (PoE)

Display

Type

LCD display - colour

Diagonal Size

2.8"

Display Resolution

320 x 240 pixels

Display Location

Base

Display Languages

Multilingual

Backlit

Yes

Phone Features

Dialer Location

Base

Conference Call Capability

5-way

Volume Control

Yes

Indicators

Voice message waiting indicator, call waiting indicator, busy lamp field (BLF)

Speakerphone

Yes

Additional Functions

Call recording, speed dial memory, redial, mute, emergency call, HD Voice, auto answer, Do Not Disturb (DND), Acoustic Shield Technology, blacklist, anonymous call, anonymous call rejection, Bridged Line Appearance (BLA)

Call Services

Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold, Call park/pickup

Caller ID Type

Caller ID

Dimensions & Weight (Base)

Width

22.49 cm

Depth

20.62 cm

Height

17.49 cm

Phone Memory

Phone Directory Capacity

1000 names & numbers

Dimensions & Weight (Handset)

Width

24.6 cm

Depth

22.3 cm

Height

12 cm

IP Telephony

Network Protocols

IP, TCP, TFTP, UDP, Cisco Discovery Protocol (CDP), HTTP, HTTPS, Link Layer Discovery Protocol (LLDP), SRTP, TR-069, SNTP, DNS SRV, STUN, Lightweight Directory Access Protocol (LDAP), FTP, DSCP, IPv6, DHCP, VLAN

Main Features

Multiple VoIP protocol support, integrated Ethernet switch

Voice Codecs

G.722, G.723.1, G.729, G.711u, G.711a, G.726, iLBC, G.729A/B

Quality of Service

IEEE 802.1Q (VLAN), IEEE 802.1p, Layer 3 TOS

IP Address Assignment

DHCP, static

Network Ports Qty

2 x Ethernet 10Base-T/100Base-TX/1000Base-T

VoIP Protocols

SIP, SRTP, RTCP-XR, VQ-RTCPXR

Compatible Software

Yealink Redirection and Provisioning Service (RPS)

Voice Features

Comfort noise generation (CNG), voice activity detection (VAD), HD Voice, acoustic echo cancellation (AEC), packet loss concealment (PLC), adaptive jitter buffer (AJB), automatic gain control (AGC), Yealink Optima HD voice technology, HD audio

Lines Supported

12 lines

Security

IEEE 802.1X, TLS, SRTP, AES, SSL

Network Features

Class 2 PoE, Lightweight Directory Access Protocol (LDAP), STUN, Network Address Translation (NAT) Traversal, 12 SIP identities / accounts, ICE, IEEE 802.3af

Power Over Ethernet (PoE) Support

Yes

VoIP

Yes