User's Manual

Grandstream Networks, Inc. HT-702 User Manual Page 8 of 32
Firmware Version 1.0.0.17 Last Updated: 02/2012
PRODUCT OVERVIEW
The HT702 is a full feature voice and fax-over IP device that offers a high-level of integration including a
10M/100Mbps network port and two FXS telephone ports, market-leading sound quality, rich functionalities,
and a compact and lightweight design. The VoIP network signaling protocol supported is SIP. The HT702
fully compatible with SIP industry standard and can interoperate with many other SIP compliant devices
and software on the market. Moreover, it supports comprehensive voice codecs including G.711 (a/µ-law),
G.723, G.726-32, G.729 and iLBC.
Software Features Overview
• 2 SIP accounts & profiles
• Supports Voice Codecs:
• G.711 (a/µ-law), G.723, G.726-32, G.729 and iLBC.
• T.38 Fax
• Comprehensive Dial Plan support for Outgoing calls.
• G.168 Echo Cancellation
• Voice Activation Detection (VAD), Comfort Noise Generation (CNG), and Packet Loss
Concealment (PLC)
• Supports PSTN/PBX analog telephone sets or analog trunks
Table 4: HT702 Technical Specifications
Telephone Interfaces
2 FXS ports, 2 SIP accounts
Network Interface
1 RJ45 for LAN, 10/100 Base-TX, Full Duplex
LED Indicators
Power, INTERNET, LINK/ACTIVITY, PHONE1, PHONE2
Reset Button
Factory Reset button
Voice over Packet
Capabilities
Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC (packet
loss concealment), Dynamic Jitter Buffer, Modem detection & auto-switch to G.711,
Packetized Voice Protocol Unit (supports RTP/RTCP protocol), G.168 compliant Echo
Cancellation, LEC (line echo cancellation) with NLP, Asymmetric RTP stream
Voice Compression
G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder, G.723,
G.726(ADPCM), G.729, iLBC, G.726 provides proprietary VAD, CNG, and signal power
estimation, Voice Play Out unit (reordering, fixed and adaptive jitter buffer, clock
synchronization), AGC (automatic gain control), Status output, Decoder controlling via
voice packet header
Telnet Server
Yes
Fax over IP
T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax
Pass-through, Fax Datapump V.17, V.19, V.27ter, V.29 for T.38 fax relay
QoS
Diffserve, TOS, 802.1 P/Q VLAN tagging
IP Transport
RTP/RTCP
DTMF Method
Flexible DTMF transmission method, user interface of In-audio, RFC2833, and/or SIP
Info
IP Signaling
SIP (RFC 3261)
Provisioning
TFTP, HTTP, HTTPS
Control
TLS/SIPS , SIP over TCP/TLS