HD 2000 SIP Manual

3. Key Features
➢ Support SIP 2.0 (RFC 3261), TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP/RARP,
DNS, DHCP, NTP, PPPoE, STUN, UPNP,TFTP, etc.
➢ Powerful Digital Signal Processing (DSP) technology to ensure superior audio
quality
➢ Support various codecs including G.711 (PCM a-law and u-law), G.723.1 , G.729A/
B, G.726-32, G.722, GSM_FR, iLBC.
➢ Support standard encryption and authentication (DIGEST using MD5, MD5-sess),
AES ?
➢ Support for Layer 2 QoS (802.1Q/VLAN Tag, 802.1p) and Layer 3 QoS (ToS,
DiffServ, MPLS)
➢ Support Silence Suppression, VAD (Voice Activity Detection), CNG (Comfort
Noise Generation), Acoustic Echo Cancellation (AEC) with Acoustic Gain
Control(AGC) for speakerphone mode.
➢ Support automated provisioning for mass deployment ,RTP and TLS (pending)for
security
protection
➢ Support automated NAT traversal without manual manipulation of firewall/NAT
➢ Support Hold, Transfer, Forward, 3-way Conference, in-band and out-of-band
DTMF, Call
Waiting, Call Log, Off-hook Auto Dial, Auto Answer, Downloadable Ringtones,
SMS,Direct IP Call, Intercom, Paging, Pick up.
➢ Support syslog, full duplex hands-free speakerphone with advanced acoustic echo
cancellation, redial, volume control, voice mail with indicator, downloadable ring
tones.
➢ Provide easy configuration through manual operation (phone keypad), Web
interface or automated centralized configuration file via TFTP, HTTP, FTP, HTTPS.
➢ Support 6 dedicated function keys: Mute, 3 level volume key, Flash (Hold),
Message, Conference, Redial.
➢ Support 3 levels ringer volume ( high/middle/off for HD2000IP with keypad,
high/middle/low for HD2000IP urgence)
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