3.1 Key Features
Grandstream
Software Features:
•Support SIP 2.0, TCP/UDP/IP, PPPoE, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS, DHCP, NTP/SNTP, TFTP.
•Support multiparty conferencing
•Supports Quick IP Call Mode.
•Support NAT traversal using IETF STUN and Symmetric RTP
•Advanced Digital Signal Processing (DSP) technology to ensure superior hi- fidelity audio quality, interoperable with various 3rd party SIP end user device, Proxy/Registrar/Server and Gateway products
•Advanced and patent pending adaptive jitter buffer control, packet delay and loss concealment technology
•Support popular codecs including G711
•Support standard voice features such as Caller ID Display or Block, Call Waiting, Call Waiting Caller ID, Call Hold, Call Transfer (attended/blind),
•Full duplex
•Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168) and AGC (Automatic Gain Control)
•Support Acoustic Echo Cancellation (AEC) with Acoustic Gain Control (AGC) for speakerphone mode
•Support sidetone
•Support DIGEST authentication and encryption using MD5 and
•Provide easy configuration through manual operation (phone keypad), Web interface or automated provisioning by downloading encrypted configuration file via HTTP/TFTP for mass deployment
•Support for Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
•Support firmware upgrade via TFTP or HTTP.
•Support DNS SRV Look up and SIP Server Fail Over
•Acoustic Echo Cancellation (AEC) with Acoustic Gain Control (AGC) for speakerphone mode
•Support for Authenticating configuration file before accepting changes
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