Grandstream Networks HT503 user manual Software Features Overview

PRODUCT OVERVIEW

The HT503 is an affordable, high-quality, integrated IP telephony solution for both the residential customers and the ‘road-warriors’ who need advanced call features between traditional PSTN network and IP network. The HT503 enables IP connectivity for any phone or fax using the FXS port and a web- based GUI for easy configuration and installation. It functions as a true FXO gateway that enables remote call origination and termination from/to PSTN and supports the feature of “hop-on/hop-off” using the programmable FXO port.

Software Features Overview

The HT503 features 2 SIP account profiles and supports advanced telephony features including caller ID, call waiting, call transfer, 3-way conferencing (with either IP or PSTN calls), and multi-language voice prompts. From a technical standpoint, the HT503 offers a power-outage survivable life line and internet- disconnect survivable fail-over-to-PSTN support, dual 10/100Mbps Ethernet ports with integrated high- performance NAT router, a flexible dial plan and a broad range of popular voice codecs.

TABLE 3: HT503 TECHNICAL SPECIFICATIONS
Interfaces	1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with lifeline support
	Two (2) 10M/100 Mbps ports (RJ45) with integrated Nat router
Protocol Support	TCP/UDP/IP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP,
	PPPoE, STUN & TELNET protocols
LED Indicators	Power, WAN, LAN, PHONE, and LINE
RESET Button	Factory Reset Button
Device Management	Web interface or via secure (AES encrypted) central configuration file for mass
	deployment
	Support device configuration via built-in IVR, Web browser or central configuration file
	through TFTP, HTTP or HTTPS
	Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
	Auto/manual provisioning system
	NAT-friendly remote software upgrade (via TFTP/HTTP/HTTPS) for deployed devices
	including behind firewall/NAT
	Syslog support
DHCP Server/Client	Yes
Audio Features	Advanced Digital Signal Processing (DSP)
	Dynamic negotiation of codec and voice payload length
	Support for G.723, G.729/E, G.711, G.726-40/32/24/16,	iLBC, T.38 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)
	Adaptive jitter buffer control
	Packet delay & loss concealment (PLC) & G.168 compliant Line Echo Cancellation
	Support volume amplification
	Support configurable Call Progress Tones
Call Handling Features	Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call transfer, hold,
	call forward, do not disturb, 3-way conferencing
Network and	Manual or dynamic host configuration protocol (DHCP) network setup; RTP and NAT
Provisioning	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
Grandstream Networks, Inc.	HT503 User Manual	Page 7 of 38
	Firmware 1.0.4.2	Last Updated: 06/2011