Grandstream Networks HT502 user manual Product Overview, Software Features Overview

PRODUCT OVERVIEW

The HT502 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 VoIP network signaling protocol supported is SIP. The HT502 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 (16/24/32/40 bit rates), AAL2 (all G.726), G.729A/B/E and iLBC.

Software Features Overview

•2 FXS ports

•Two RJ-45 ports (switched or routed)

•2 SIP accounts & profiles

•Supports Voice Codecs:

G711(a/µ, Annex I & II), G723.1A, G726 (ADPCM with 16/24/32/40 bit rates), G729 A/B/E, 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 3: HT502 TECHNICAL SPECIFICATIONS

	Telephone Interfaces	2 FXS ports, 2 SIP accounts
	Network Interface	1 RJ45 for LAN, 10/100 Base-TX, Full Duplex
		1 RJ45 for WAN,10/100Base-TX, Full Duplex
	LED Indicators	Power, WAN, LAN, PHONE1 and PHONE2
	Reset Button	Factory Reset button
	Voice over Packet	Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC (packet
	Capabilities	loss concealment), Dynamic Jitter Buffer, Modem detection & auto-switch to G.711,
		Packetized Voice Protocol Unit (supports RTP/RTCP and AAL2 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.723.1A,
		G.726(ADPCM), G.729A/B/E, 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
	DHCP Server/Client	Yes, NAT Router or Switched Mode
	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
Grandstream Networks, Inc.		HT-502 User Manual	Page 7 of 32
		Firmware Version 1.0.4.2	Last Updated: 06/2011