Audio
Voice codecs	G.711Mu, G.711a, G.722, G.729A, G.729B, OPUS
Speakerphone
Microphone mute
Echo cancellation
Voice activity detection
Adaptive jitter buffers
Packet loss concealment (PLC)
Certificates
Compliance certificates	CE, Federal Communications Commission (FCC)
Sustainability compliance
Design
Product type	IP Phone
Handset type	Wired handset
Product colour	Black
Wall mountable
Display
Display	TFT
Display diagonal	12.7 cm (5")
Display resolution	1280 x 720 pixels
Touchscreen
Logistics data
Master (outer) case gross weight	14.5 kg
Master (outer) case length	467 mm
Master (outer) case width	579 mm
Master (outer) case height	291 mm
Management features
Volume control	Buttons
Number of programmable keys	8
Integrated voicemail
Firmware upgradeable
Network
Ethernet LAN interface type	Gigabit Ethernet
Ethernet LAN data rates	10,100,1000 Mbit/s
Supported network protocols	IPv4, TCP, UDP, ICMP, ARP, RTP, SRTP, RTCP-XR, 802.1x, IP/DHCP IP, IEEE 802.1p/Q, QoS/ToS, HTTP/HTTPS/DHCP, NTP, FTP/TFTP, CDP/LLDP VLAN, LDAP
Security algorithms	HTTPS, SRTP, SSL/TLS
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN
Wi-Fi
Bluetooth
Quality of Service (QoS) support
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Storage temperature (T-T)	-20 - 70 °C
Packaging content
Number of handles included	1 pc(s)
Cables included	LAN (RJ-45)
Manual
AC adapter included
Performance
Operating system installed	Android
Operating system version	9
Dual-Tone Multi-Frequency (DTMF) modes	SIP info
Phone features
Lines quantity	8 lines
Answering machine
Call waiting
Speed dialling
Call hold
Call forwarding
Conference call
Redialing
Do not disturb function
Caller ID
Call park
Call pick up
Full duplex
Call transfer
Message-waiting indicator (MWI)
Ports & interfaces
USB 2.0 ports quantity	2
Ethernet LAN (RJ-45) ports	2
RJ-9 ports quantity	1
WAN connection type	RJ-45
DC-in jack
Cable lock slot
Power
AC adapter input voltage	100 - 240 V
AC adapter output voltage	12 V
AC adapter output current	2 A
Power over Ethernet (PoE)
Weight & dimensions
Width	236 mm
Depth	200 mm
Height	165.9 mm
Weight	988 g
Height (min)	17 cm
Height (max)	19.5 cm
Package width	280 mm
Package depth	245 mm
Package height	110 mm
Package weight	1.55 kg

Teams C455HD IP-Phone PoE GbE with an external power supply black 2 Ethernet 10/100/1000 ports, 1280x720 12,7 cm ( 5 inch ) Color Touch LCD and Power over Ethernet (PoE) without expansion unit support