caller ID, call waiting, 3-way conference,
blind or
attended transfer
call forward, do not disturb, voicemail, MLS
voice prompts
T.38 fax, flexible dial plan, direct IP
calling
Supports Voice Codecs:
G.711(a/u-law), G.723.1, G.729A/B,
G.729E
G.726-40/32/24/16 and iLBC
T.38 Fax
HTTP/HTTPS(pending)/Telnet/TFTP
Provisioning
SIP over TCP/TLS
IP connectivity for any phone and
fax
Web management for easy configuration and
installation
Offers traditional and advanced telephony
features
Portable and compact for use at home or on the
road
Grandstream
HT502 - Overview
The HT502 is SIP 2.0
standard compliant and features 2 FXS ports, dual
10M/100Mbps Ethernet ports with integrated high performance NAT router,
port status and message waiting LED, and a base stand for vertical
positioning. It supports Universal Plug-in-Play (UPnP), up to 2 SIP
account profiles, and traditional and advanced telephony features.
The HT502 provides an
enhanced level of security and provides automated
provisioning using symmetric and asymmetric voice codec/RTP in any call
sessions, and supports a broad range of popular voice codecs.
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
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
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
DHCP
Server / Client
Yes,
can operate in NAT
Router or Switched Mode
QoS
Diffserve,
TOS, 802.1 P/Q
VLAN tagging
IP
Transport
RTP/RTCP
IP
Signalling
SIP
(RFC 3261)
DTMF
Method
Flexible
DTMF transmission
method, user interface of In-audio, RFC2833, and/or SIP Info
Provisioning
TFTP, HTTP,
HTTPS (pending)
Management
Syslog
support, HTTPS and
telnet (pending), remote management using Web browser, Auto/manual
provisioning system Support Layer 2 (802.1Q, VLAN, 802.1p), Layer 3 QoS
(Tos, DiffSery, MPLS)
Power
Output:
12VDC,
0.5A;
Input: 100–240 VAC, 50-60 Hz
Environmental
Operational:
32°–104°F or
0°–40°C
Storage: 10°–130°F
Humidity: 10–90% Non-condensing
Dimensions
( H x W x D)
25mm
x 115mm x 75mm (when
laying flat);
115mm x 25mm x 75mm (standing up)
Short
and long haul
REN3:
Up to150 ft
on 24 AWG line
Caller
ID
Bellcore
Type 1 &
2, ETSI, BT, NTT, and DTMF-based CID
