Chapter 1
Introduction
Overview
Meeting the next-generation Internet telephony service demands, the PLANET VIP-255PT is an ideal
solution for office / home use as well as installation for Internet Telephony Service Provider (ITSP).
VIP-255PT is a SIP IP phone includes 2-voice line, 4 soft-buttons and with 802.3af Power over
Ethernet (PoE) LAN interface supported. The built-in Graphic LCD of the VIP-255PT is with blue
backlight and support multi-language on both LCD and webpage. The VIP-255PT is the delivery
platform for IP voice services that brings benefits from the VoIP technologies in your daily life. The ITSP
can diagnose and configure the phone remotely and thus reduce the cost of service.
The VIP-255PT has additional rich features including support of SMS and voice mail and etc., which
would increase ARPU for service providers. It also features self-contained, service-integrated,
intelligent phone functions, and powerful voice processing. The VIP-255PT can effortlessly deliver toll
voice quality equivalent to the regular SIP Protocol connections by utilizing cutting-edge Quality of
Service, echo cancellation, comfort noise generation (CNG) and voice compensation technology.
Meanwhile, the dual Ethernet interfaces on the IP Phone allow users to install in an existing network
location without interfering with desktop PC network connections.
Product Features
• SIP 2.0 and 802.3af PoE
• Multi–Language Function
• SMS (Short Message Service) Function
• GIPS voice engine embedded to generate stable and clear voice quality
• Voice Codec: G.711, G.729AB, G.726, iLBC or G.723.1
• Supports VAD, CNG, AEC, AGC and Volume adjustment.
• Large graphic LCD with blue backlight supports
• Call hold, call waiting, call forward, call transfer, 3-way conference, auto answer and Hotline
settings
• Supports Caller ID/Name display and DND
• Supports phone book, speed dial, call list, dial plan, volume adjustment and rings selection
• Supports NAT transverse: STUN mode
• IP Assignment: Static IP/ DHCP/PPPoE
• Supports in-band DTMF and out-of band RFC2833 DTMF
• Supports Proxy mode and peer-to-peer SIP link mode
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