Grandstream Networks GXP-2000 - Manual (Page 9)

GXP-2000 User Manual
Grandstream Networks, Inc.
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3.1 Key Features
Grandstream GXP-2000 IP Phone is a next generation enterprise IP telephone based on
industry open standard SIP (Session Initiation Protocol). Built on innovative technology,
Grandstream IP Phone features market leading superb sound quality and rich
functionalities at mass-affordable price.
Software Feature:
• Support SIP 2.0, TCP/UDP/IP, PPPoE, RTP/RTCP, HTTP, ARP/RARP, ICMP,
DNS, DHCP, NTP/SNTP, TFTP, SIMPLE/PRESENCE protocols
• Support NAT traversal using IETF STUN and Symmetric RTP
• Advanced Digital Signal Processing (DSP) technology to ensure superior hi-
fidelity audio quality, interoperable with various 3 rd party SIP end user device,
Proxy/Registrar/Server and Gateway products
• Advanced and patent pending adaptive jitter buffer control, packet delay and loss
concealment technology
• Support popular codecs including G711 (a-law and u-law), G722, G.723.1
(5.3K/6.3K), G.726 (40K/32K/24K/16K), G.728, G.729A/B, GSM and iLBC.
Dynamic negotiation of codec and voice payload length
• Support standard voice features such as Caller ID Display or Block, Call Waiting,
Call Waiting Caller ID, Call Hold, Call Transfer (attended/blind), Do-Not-Disturb,
Call Forwarding, in-band and out-of-band DTMF(RFC2833), SIP INFO, Dial
Plans, Off-Hook Auto Dial, Auto Answer, Early Dial and Speed Dial, etc.
• Full duplex hands-free speakerphone, redial, call log, volume control, voice mail
with indicator, downloadable ring tone, etc.
• Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort
Noise Generation), Line Echo Cancellation (G.168) and AGC (Automatic Gain
Control)
• Support DIGEST authentication and encryption using MD5 and MD5-sess)
• Provide easy configuration through manual operation (phone keypad), Web
interface or automated provisioning by downloading encrypted configuration file
via HTTP/TFTP for mass deployment
• Support for Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ,
MPLS)
• Support firmware upgrade via TFTP or HTTP.
• Support DNS SRV Look up and SIP Server Fail Over