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T
3: HT–502 T
ABLE
ECHNICAL
Telephone Interfaces
Network Interface
LED Indicators
Reset Button
Voice over Packet
Capabilities
Voice Compression
DHCP Server/Client
Fax over IP
QoS
IP Transport
DTMF Method
IP Signaling
Provisioning
Control
Management
Power
Environmental
Dimensions
(H x W x D)
Short and long haul
Call Handling
Features
Caller ID
Polarity Reversal /
Wink
EMC
Safety
Grandstream Networks, Inc.
S
PECIFICATIONS
HT
502 Analog Telephone Adaptor
–
2 FXS ports, 2 SIP accounts
Two (2) 10M/100 Mbps, RJ-45
Power, WAN, LAN, PHONE1 and PHONE2
Factory Reset button.
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 and AAL2 protocol),
G.168 compliant Echo Cancellation, LEC (line echo cancellation) with NLP
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
Yes, NAT Router or Switched Mode
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
Diffserve, TOS, 802.1 P/Q VLAN tagging
RTP/RTCP
Flexible DTMF transmission method, user interface of In-audio, RFC2833,
and/or SIP Info
SIP (RFC 3261)
TFTP, HTTP, HTTPS (pending)
TLS/SIPS
Syslog support, HTTPS and telnet (pending), remote management using
Web browser
Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (Tos, DiffSery,
MPLS)
Auto/manual provisioning system
Output: 12VDC / Input: 100–240 VAC/50-60 Hz
o
o
Operational: 32
–104
F or 0
o
o
Storage: 10
–130
F / Humidity: 10–90% Non-condensing
REN3: Up to150 ft on 24 AWG line
Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call
transfer, hold, forward, mute, 3-way conferencing
Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
Yes
EN55022/EN55024 and FCC part15 Class B
UL
HT-502 User Manual
Firmware 1.0.0.29
o
o
–40
C
Page 8 of 31
Last Updated: 01/2007
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