Predám voip telefón Grandstream

Predám voip telefón Grandstream GXV3175. Kontaktujte ma cez formulár číslo vymyslene

technicke info:
Lines Three individual SIP accounts.
Protocol Support SIP 2.0, UDP/IP, PPPoE, RTP/RTCP, SRTP by SDES, HTTP, ARP/RARP, ICMP,
DNS, DHCP, NTP/SNTP, TFTP.
Display 7” resistive touch screen LCD with 800 x 480 resolution.
Network Interfaces Dual switched 10M/100M auto-sensing Ethernet ports, 2 x USB 2.0 port,
1 x audio/video output port (to synchronize output video to TV), stereo
headset jack.
Device Management Layer 2 QoS (IEEE 802.1p/Q tagging-VLAN) and Layer 3 QoS (ToS,
DiffServ, MPLS), web interface or via secure (AES encrypted) central
configuration file for mass deployment, auto/manual provisioning
system, remote software (TFTP/HTTP/HTTPS) upgrade for deployed
devices including those behind 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
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 cus