The Grandstream H T 503 is the next generation of powerful, affordable, high quality and manageable phone adapter for residential users and businesses. 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 Grandstream HT503 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.
IP connectivity for phone and fax 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. LED for power, telephone, PSTN line, network, and message waiting indication. 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. Web management for easy configuration and installation.