Grandstream IP Phones are trusted and deployed by some of the largest enterprises and service providers in the world.
Choose between Sangoma’s scalable A200 and A400 cards for 2-24 analog ports on a single interface slot on your server! . That’s up to 24 simultaneous PSTN calls.
Choose from 1,2,4,8 and even 16 ports of E1/T1/J1 optimized for voice and data applications. That’s up to 480 simultaneous , all on a single PCI/PCIexpress interface slot!.
the only officially supported hardware solution for high-performance PBX solution , preloaded with the FreePBX Distro and includes a one-year warranty.