This new generation residential IP Phone is a full-featured telephone that provides voice communication over an IP network. P170S supports router feature and three visible LED indicators. Moreover, with its powerful CPU, many advanced features can be extended such as SIPs/sRTP.

Features:
- Protocol：SIP (RFC3261)
- Interface: 1 Ethernet (WAN) & 1 Ethernet (PC)
- LCD: 2 lines x 16 letters
- Codec: G.711A-Law/u-Law, G.729AB
- Voice Quality: VAD, CNG, AEC (G.168)
- Easy setting by Web browser
- Auto firmware upgrade（TFTP）
- 3-way conference
- Speed Dial
- Phone Book
- IP address: Static IP/PPPoE/DHCP
- NAT traversal: UPnP and STUN
- Handset/Speaker phone
- Out-of-band DTMF (RFC2833)
- Voice Mail with message waiting indicator
- Call Forward (Busy, No answer, Unconditional)
- Call Transfer (Unattended, Blind, Attended)
- QoS: IEEE 802.1q
- Anonymous call block, Caller ID Display
- Jitter buffer auto adjustment

More detail information, please refer to the following link:P170S IP Phone product informaiton