Grandstream Networks GXV3175 User Manual page 8

Audio Features
Video Features
Call Handling Features
Caller ID（Privacy）
Firmware Upgrade
Advanced Server Features
Security
Grandstream Networks, Inc.
- Configuration through LCD, web browser or an external configuration file.
- Support for IETF STUN NAT traversal and symmetric RTP, Static IP or
DHCP.
- 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.
- 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 (WQVGA,
QQVGA, QCIF, QVGA, WQVGA, CIF, VGA, 4CIF) 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.
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.
Private header support for anonymous calls.
- Configuration file authentication (before accepting changes).
- TFTP/HTTP/HTTPS upgrade support, allows users to specify different
URLs for the server to download from.
DNS SRV support, SIP server failure transfer, message waiting indicator
and custom screensaver.
- 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.
GXV3175 USER MANUAL Page 8 of 60
Updated : 3/2012