user manual

Grandstream Networks, Inc. GXP21xx User Manual Page 9 of 41
Firmware version: 1.0.1.66 Last Updated: 05/2011
Humidity
10% – 90% (non-condensing)
Compliance
FCC / CE / C-Tick
Table 7: GXP21xx Technical Specifications
Lines
Multiple direct lines with independent SIP accounts, programmable speed dial
keys,
XML programmable soft-keys
Protocol Support
Support SIP 2.0, TCP/UDP/IP, PPPoE, RTP/RTCP, SRTP by SDES, HTTP,
ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, SIMPLE/PRESENCE protocols,
TR-069, 802.1x
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 MFKs, SIP Dialog package (RFC 4235)
Support for SIP MESSAGE method (RFC 3428)
Display
Backlit graphic LCD display, up to 8 level grayscale
Feature Keys
Feature keys on different models:
GXP2120 GXP2110 GXP2100
HOLD Yes Yes Yes
SPEAKERPHONE Yes Yes Yes
SEND Yes Yes Yes
TRANSFER Yes Yes Yes
CONF Yes Yes Yes
MUTE Yes Yes Yes
DND Yes Yes No
HEADSET Yes Yes Yes
INTERCOM Yes Yes Yes
PHONEBOOK Yes Yes Yes
MSG Yes Yes Yes
MENU Yes Yes Yes
NAVIGATION (4) Yes Yes Yes
Device Management
NAT-friendly remote software upgrade (via TFTP/HTTP) for deployed devices
including behind firewall/NAT
Auto/manual provisioning system, Web GUI Interface
Expansion interface, Address Book
Audio Features
Full-duplex hands-free speakerphone, headset enabled
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), 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