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Quick Overview


Analog Telephone Adapter (ATA) and VoIP Router

Grandstream HandyTone HT503 ATA/IAD Information:

The impressive Grandstream HandyTone 503 offers the upcoming generation of strong, inexpensive, supreme and manageable IP telephony ATA/IAD. The integration of a FXO and FXS port enables remote call origination and termination to and from the PSTN line, known as "hop-on and hop-off" calling. This functionality coupled with its compact size makes it an ideal solution for road warriors seeking the savings and benefits of voice-over-ip communication.


The HandyTone 503 is based on SIP standard and interoperable with most 3rd party SIP compliant devices and software. It features 1 FXS telephone port, 1 FXO PSTN line port, dual 10M/100Mbps network ports, port status and message waiting LED, and a base stand for vertical positioning.


1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with power-outage life line support,
Up to 2 SIP account profiles, SIP over TCP/TLS, SRTP
Dual 10/100 Mbps network ports (RJ45) with integrated high performance NAT router
Status LED for power, telephone, PSTN line, network, and message waiting indication
Advanced telephony features
Caller ID from both IP and PSTN,
Call waiting, 3-way conference with IP and/or PSTN,
Remote call origination and termination from/to PSTN,
Hop-on and hop-off calling,
Transfer to OR forward to IP or PSTN,
Do not disturb,
Message waiting indication,
Multi-language voice prompts,
Flexible dial plan, direct IP calling
Comprehensive voice codecs
Secure and automated provisioning using HTTP/HTTPS/Telnet/TFTP
Symmetric and asymmetric voice codec/RTP in any call sessions
T.38 Fax



  Grandstream HandyTone HT503 ATA/IAD Datasheet

Mfg. Part Number: HT503

UPC Code: 6947273700074

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upc 06947273700074
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