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Grandstream Networks, Inc. HT496 User Manual Page 7 of 29
Firmware 1.0.3.86 Last Updated: 7/2007
PRODUCT OVERVIEW
The HT496 is a full feature voice and fax-over IP device that offers a high-level of integration including
dual 10M/100Mbps network ports with integrated router, NAT, DHCP server, dual port FXS telephone
gateway, market-leading sound quality, rich functionalities, and a compact and lightweight design. The
H496 is fully compatible with SIP industry standard and is interoperable with most other SIP compliant
devices and software. It also supports comprehensive voice codecs.
KEY FEATURES
Ethernet Ports DHCP FXS Port
PSTN
Pass – through
Voice Mail
Indicator
Voice Codec
Remote
Configuration
2 RJ45 (LAN)
Server/
Client
2 No Yes
iLBC, G.723,
G.711, G.729,
G.726, T.38
TFTP/HTTP
T
ABLE 2: HT496 Technical Specifications
Lines/SIP Accounts
2 lines / 2 SIP accounts
Protocol Support
SIP 2.0 (RFC 3261), TCP/UDP/IP, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS, DHCP,
NTP, TFTP, PPPoE protocols
Feature Keys
1 button
LAN/WAN Interface
RJ45 10 Mbps
Device Management
Web interface or via secure (AES encrypted) central configuration file for mass
deployment, Auto/manual provisioning system, Syslog support
Support device configuration via built-in IVR, Web browser or central configuration file
through TFTP or HTTP, Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS
(ToS, DiffServ, MPLS)
NAT-friendly remote software upgrade (via TFTP/HTTP) for deployed devices including
behind firewall/NAT
DHCP Server/Client
Yes, NAT Router or Switched Mode
Audio Features
Advanced Digital Signal Processing (DSP), Adaptive jitter buffer control, Packet delay &
loss concealment
Support configurable Call Progress Tones
Support volume amplification, Dynamic negotiation of codec and voice payload length
Support for G.723,1 (5.3K/6.3K), G.729A, G.711 µ/A, G.726, and iLBC codecs
In-band and out-of-band DTMF ((in audio, RFC2833, SIP INFO)
Silence Suppression, VAD (voice activity detection), CNG (comfort noise generation),
ANG (automatic gain control)
Call Handling Features
Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call transfer, hold,
forward, mute, 3-way conferencing
Network and
Provisioning
Manual or dynamic host configuration protocol (DHCP) network setup; RTP and NAT
support traversal via STUN
Fax over IP
T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax
Pass-through (pending)
Fax Datapump V.17, V.19, V.27ter, V.29 for T.38 fax relay
Security
DIGEST authentication and encryption using MD5 and MD5-sess
Physical Design
Stylish and compact design; small universal power supply, ideal for travel