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Grandstream Networks, Inc. HT-70X User Manual Page 9 of 35
Firmware Version 1.0.0.18 Last Updated: 03/2012
PRODUCT OVERVIEW
The HT70X is a full feature voice and fax-over IP device that offers a high-level of integration including a
10M/100Mbps network port and one FXS telephone port, market-leading sound quality, rich functionalities,
and a compact and lightweight design. The VoIP network signaling protocol supported is SIP. The HT70X
is 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.723.1, G.726-32, G.729 and iLBC.
Software Features Overview
Supports Voice Codecs:
G.711 (a/µ-law), G.723.1, 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
Table 4: HT70X Software Features
HT 701
HT 702
HT 704
Telephone Interfaces
1 FXS ports
2 FXS ports
4 FXS ports
SIP Provisioning
1 Sip Account, 1 Profile
2 Sip Accounts, 2 Profiles
4 Sip Accounts, 2 Profiles
Number of
Concurrent Calls
1 Concurrent Call
2 Concurrent Calls
4 Concurrent Calls
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.723.1, G.726-
32(ADPCM), G.729, iLBC, G.726-32 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
DHCP Server/Client
Yes, DHCP Client only
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
Transport Protocol
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, TR-069, XML