• 2-Line enterprise-class IP phone
• IEEE 802.3af Power over Ethernet (PoE) compliant
• Connects directly to an Internet telephone service provider or to an IP PBX
• Dual switched Ethernet ports, speakerphone, caller ID, call hold, conferencing, and more
• Easy installation and highly secure remote provisioning, as well as menu-based and web-based configuration

Telephony Features
• Two Voice Lines
• Pixel-based Display: 128 x 32 monochrome graphical liquid crystal display (LCD)
• Caller ID and Call Waiting ID
• 3-Way Conferencing 
• SMS Functions
• Busy Lamp Field (BLF)
• Do Not Disturb (DND)
• Full-Duplex Speakerphone
• Call Transfer: Blind Transfer and Attended Transfer
• Call Mute, Redial, Speed Dial, Pick Up, Call Park, Dial Plan, Call Hold, Call Forwarding

• SIP V2 (RFC 3261,3262,3263,3264)
• STUN (RFC 3489)
• Automated provisioning and upgrade via HTTPS, HTTP, TFTP 
• Message Waiting Indicator (RFC 3842)
• IEEE 802.1Q VLAN / 802.1p and IP ToS
• TR069 / SNMP v2

Model VIP-256PT
Hardware Specification
Lines 2Line enterprise-class IP phone
Network Interface Two 10/100BASE-T RJ-45 Ethernet ports IEEE 802.3 / 802.3af Power over Ethernet compliant
Handset: RJ-9 connector
Built-in speakerphone and microphone
Feature Keys 2line keys and 4 soft keys
12dialing buttons 0~9
9fixed function buttons
10multi-functional key with dual-color LED
Dimensions W x D x H 191x 205 x 75 mm
Power Requirements 5V DC, 1A
IEEE 802.3af
Protocols and Standard
Data Networking MAC Address IEEE 802.3
IPv4 RFC 791
Address Resolution Protocol ARP
DNS: A record (RFC 1706), SRV record RFC 2782
Dynamic Host Configuration Protocol (DHCP) client RFC 2131
Internet Control Message Protocol (ICMP) RFC 792
User Datagram Protocol UDP RFC 768
Real Time Protocol RTP RFC 1889, 1890
Real Time Control Protocol (RTCP) RFC 1889
Differentiated Services (DiffServ) RFC 2475
Type of service (ToS) RFC 791, 1349
VLAN tagging 802.1p Layer 2 quality of service QoS
Simple Network Time Protocol (SNTP) RFC 2030
Backward compatible with RFC 2543
Session Timer RFC 4028
SDP RFC 2327
NAPTR for SIP URI Lookup RFC 2915
Voice Gateway SIP version 2 (RFC 3261, 3262, 3263, 3264
SIP supported in NAT networks [including STUN RFC 3489
Message Waiting Indicator RFC 3842
Voice algorithms
G.711 A-law and μ-law
G.726 16/24/32/40 kbps
Dual-Tone Multi-Frequency (DTMF), In-Band and Out-of-Band (RFC 2833) SIP INFO
Voice Activity Detection (VAD) with Silence Suppression
Adaptive Jitter Buffer Management
Comfort Noise Generation
Echo Cancellation Message
Provisioning, Administration,and Maintenance Integrated web server provides web-based administration and configuration
Telephone keypad configuration via display menu/navigation
Automated provisioning and upgrade via HTTPS, HTTP, TFTP
User Authentication for configuration pages
Local and Remote Syslog RFC 3164
SNTP Time Synchronization
Multi User Level
Telephony Features Two Voice Lines
Call Waiting
Auto Answer
Music on Hold
Caller ID and Call Waiting ID
3Way Conferencing
Call Hold, Call Forwarding, Call Mute
Call Transfer: Blind Transfer and Attended Transfer
Call Log: Redial List, Answered Calls and Missed Calls
Volume Adjustment: Handset/Headset, Speaker and Ringer
Delayed Hotline
Redial, Speed Dial
Busy Lamp Field BLF
Pick Up, Call Park, Dial Plan
Black List
Message Waiting Indicator MWI
Do Not Disturb DND
Full-Duplex Speakerphone
Customized Ring Tone
SMS 100 records
Call History 100 records
Most Recently Missed Calls
Most Recently Received Calls
Most Recently Dialed Numbers
Phone Book 100 records
Speed Dial 10 records
Operating 0-50degrees

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