100 $

1 in stock

  • Cash On Delivery
  • Written warranty card

The GRANDSTREAM IP NETWORK TELE ADA is a versatile VoIP adapter that seamlessly connects analog telephony devices to IP networks. Firstly, this compact device serves as a bridge, enabling smooth integration between traditional analog phones, fax machines, or PBX systems and the IP network. Moreover, with its reliable performance and user-friendly setup, the HT503 simplifies the transition from analog telephony to VoIP, providing a cost-effective solution for businesses and individuals. Additionally, whether you’re looking to upgrade your communication system or enhance the functionality of your existing analog devices, the Grandstream HT503 offers a flexible and reliable solution. In summary, the HT503 is an ideal choice for those seeking a seamless and efficient way to incorporate analog telephony devices into IP networks.


  • The HT503 offers two FXS (Foreign Exchange Station) ports that allow you to connect standard analog phones, fax machines, or PBX systems to the IP network, enabling you to make and receive calls over the internet.
  • The device utilizes advanced voice codecs, such as G.711 and G.729, ensuring excellent call quality and clarity. It also supports T.38 Fax-over-IP for reliable fax transmission.
  • The HT503 is based on the SIP (Session Initiation Protocol) standard, making it compatible with a wide range of VoIP service providers, IP-PBX systems, and softphone applications.
  • The device supports a variety of call features, including call waiting, caller ID, call transfer, call forwarding, call hold, and 3-way conferencing, providing users with flexibility and control over their calls.
  • The HT503 includes a built-in router with Network Address Translation (NAT) functionality, allowing for easy network setup and configuration. It supports static IP, DHCP, PPPoE, and VLAN tagging, ensuring seamless connectivity.
  • The HT503 features a user-friendly web interface and an integrated automated provisioning system, making it simple to set up and manage the device. It also supports TR-069 and XML configuration files for remote provisioning.
  • The device incorporates advanced security features, including TLS and SRTP encryption, ensuring secure voice and data transmission over the network. It also supports secure and automated provisioning methods for enhanced network protection.
  • The HT503 provides a range of network and QoS features, such as VLAN tagging, DHCP client, DNS, and DiffServ, to prioritize voice traffic and ensure optimal call quality.
  • The HT503 has a compact form factor, making it easy to install and integrate into existing telephony setups. Its robust construction ensures durability and reliability.

Overall, the Grandstream HT503 offers a comprehensive set of features designed to facilitate the smooth transition from analog telephony to IP networks, providing users with a cost-effective and feature-rich VoIP solution.


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