Same Day Dispatch for Orders Before 2pm
VAT-Free EU ExportsSecured by Sage Pay

  Home > Products >

Grandstream Handytone HT503 Analogue Telephone Adaptor (ATA)

Grandstream HT503 ATA

Our Price: £48.00 (57.60 inc VAT)

Product Code: HT503


The HandyTone 503 is the next generation of powerful, affordable, high quality and manageable IP telephony ATA/IAD for residential users and road-warriors. Its compact size, excellent voice quality, packed feature functionality and best-in-class price-performance point enable consumers to maximize the power of IP voice and data connectivity.

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.

Features and Benefits


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


IP connectivity for any phone and fax
Hop-on/Hop-off calling
Web management for easy configuration and installation
Offers traditional and advanced telephony features
Portable and compact for use at home or on the road