Polycom HD Voice technology

248 x 68, White LED backlight

Transport Layer Security (TLS)
Digest authentication
HTTPS secure provisioning
Encrypted configuration files
Password login

IETF SIP (RFC 3261 and companion RFCs)

IP Address Configuration: DHCP and Static IP
Ethernet 10/100 Base-T
Network Address Translation (NAT)
FTP / TFTP / HTTP / HTTPS
Integrated Power over Ethernet (PoE)
RTCP support (RFC 1889)
QoS Support -- IEEE 802.1p/Q tagging (VLAN), Layer 3 TOS and DSCP

Voice activity detection

2 x RJ-9

Expandabil

-30 ~ 55

12-key keypad
On-hook/Off-hook, redial, mute, volume up/down
Context-dependent soft keys: 3

20 ~ 85 %

800

0 - 40

36.8 x 31.1 x 6.4 cm

Functii: Shared call, Busy Lamp Field (BLF), call waiting, Call timer, Call transfer, hold, divert, Local three-way conferencing, One-touch speed dial, redial