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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
Telnet Server
Fax over IP
QoS
IP Transport
DTMF Method
IP Signaling
Provisioning
Control
Management
Dial Plan
UPnP
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, Asymmetric RTP stream
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
Yes
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 , SIP over TCP/TLS
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
Yes
Yes
Output: 12VDC / Input: 100–240 VAC/50-60 Hz
o
Operational: 32
–104
o
o
Storage: 10
–130
115mm (L) x 75mm (W) x 27mm (H)
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, message waiting, Do-Not-Disturb
(DND), call-return service
Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
/
Yes
EN55022/EN55024 and FCC part15 Class B
UL
HT-502 User Manual
o
o
o
F or 0
–40
C
F / Humidity: 10–90% Non-condensing
Firmware 1.0.0.39
Page 8 of 35
Last Updated: 03/2007
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