Grandstream Networks GXP Series User Manual page 11

Multiple direct lines with independent SIP accounts, programmable speed dial keys,
Lines
XML programmable soft-keys. (except on GXP-280)
Support SIP 2.0, TCP/UDP/IP, PPPoE, RTP/RTCP, SRTP by SDES, HTTP,
Protocol
ARP/RARP, ICMP, DNS, DHCP, NTP/SNTP, TFTP, SIMPLE/PRESENCE protocols
Support
Support multiple SIP accounts and up to 11 media channels concurrently
Support SIP PUBLISH method (RFC 3903), SIP Presence package (RFC 3856,
3863) for use of 7 MFKs, SIP Dialog package (RFC 4235)
Support for SIP MESSAGE method (RFC 3428)
Stores up to 100 incoming IM messages (drops IM message 101 plus)
Back-lit graphic LCD display. (GXP-280 display is not back-lit)
Display
Feature Keys
HOLD
SPEAKERPHONE
SEND
TRANSFER
CONF
MUTE
DND
HEADSET
INTERCOM
PHONEBOOK
MSG
MENU
NAVIGATION (4)
NAT-friendly remote software upgrade (via TFTP/HTTP) for deployed devices
Device
including behind firewall/NAT
Management
Auto/manual provisioning system, GUI Interface
Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
Expansion interface, Address Book
Full-duplex hands-free speakerphone, headset enabled
Audio Features
Advanced Digital Signal Processing (DSP)
Dynamic negotiation of codec and voice payload length
Support for G.723,1 (5.3/6.3K), G.729A/B, G.711 a/µ-law, G.726-32, G.722 (wide-
band), GSM and iLBC codecs
In-band and out-of-band DTMF (in audio, RFC2833, SIP INFO)
Silence Suppression, VAD (voice activity detection), CNG (comfort noise
generation), ANG (automatic gain control)
Acoustic Echo Cancellation (AEC) with Acoustic Gain Control (AGC) for
speakerphone mode, Support side tone
Adaptive jitter buffer control (patent-pending) and packet delay & loss concealment
Intuitive graphic user interface (GUI), downloadable phone book (XML, LDAP),
Telephony
support for anonymous call using privacy header, MLS (multi language support)
Features
Voice mail indicator, downloadable custom ring-tones, call hold, call transfer
(attended/blind), call forward, call waiting, caller ID, mute, redial, call log, caller ID
display or block, Do-Not-Disturb (DND) and volume control
Multi-party conferencing (up to 5), dial plan prefix, off-hook auto dial, auto answer,
early dial and speed dial (on some models)
Grandstream Networks, Inc.
GXP-280 GXP-
1200
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No No
No No
Yes Yes
Yes Yes
Yes (3) Yes
GXP User Manual
Firmware 1.1.6.16
GXP-2000 GXP-2010
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
No Yes
No Yes
Yes Yes
Yes Yes
Yes Yes
Last Updated: 05/2008
GXP-2020
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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