User's Manual Part 1

Grandstream Networks, Inc. GXV3175 USER MANUAL Page 5 of 68
FIRMWARE VERSION 1.0.0.32 Updated : 11/2010
behind a NAT/firewall.
Provisioning - Support for automatic NAT/firewall traversal and remote automatic
software upgrade and security, providing end-users with “zero
configuration” and true “plug-and-play” functionality.
- Support for remote configuration monitoring and syslog.
- Configuration through LCD, web browser or an external configuration
file.
- Support for IETF STUN NAT traversal and symmetric RTP, Static IP or
DHCP.
Audio Features - HD handset and full duplex speaker, advanced DSP.
- Supports G.723.1, G.729A/B,G.711μ/A (PCMU/PCMA), G.726-32,G.722,
GSM-FR, L15-256 DTMF (In-audio, RFC2833, SIP Info); Silence
suppression, VAD, CNG, AGC, masking for packet loss/delay; AEC, AGC
for Speaker; jitter buffer protocol.
Video Features - Support for Jitter Buffer delay and packet loss concealment to enhance
audio and video quality.
- Support for H.263/H.263+ and H.264 real-time video codecs (CIF or
QVG) up to 30frames/sec, which ensures high quality video transmission
even under low bandwidth conditions (32kbps-1Mbps).
- 7” resistive touch screen LCD with 800 x 480 resolution, 45 degree
rotating lens (perpendicular), advanced VGA CMOS camera and sensor.
- Anti-flickering of images, auto focus, auto exposure, zoom (2x optical 2x
digital ), PIP(Picture-in-Picture) , audio mute, camera block, call log, video
phone book, screensaver, still picture capture/store (VGA) and visual
voice message indicator.
Call Handling Features Caller ID, call waiting ID, call waiting/flash, call transfer, call holding, call
forwarding, Do-Not-Disturb, three-way conference, redial, automatic
dialing on off-hook, automatic answering, call records, volume control,
voice message waiting indicator, downloadable custom ring tone,
switchable handset/headset/speaker during call.
Caller ID（Privacy）
Private header support for anonymous calls.
Firmware Upgrade - Configuration file authentication (before accepting changes).
- TFTP/HTTP upgrade support, allows users to specify different URLs for
the server to download from.
Advanced Server Features DNS SRV support, SIP server failure transfer, message waiting indicator
and custom screensaver.
Security - MD5 and MD5-sess DIGEST encoding and authentication.
- Security protection: SIP over TLS and SRTP.
- Support for TR-069.
- Support for OpenVPN for increased security and control.