Essentially, the Quadro ISDN gateway is a modular approach to adding additional outside PSTN or traditional telephone service lines to a corporate phone network that utilises an Epygi Quadro IP PBX. Each Quadro ISDN is a stand-alone SIP gateway device consisting of a VPN-router, firewall, HTTP server and call processing software.
If you will not be using this as an addition to other Epygi equipment you will surely want to use this as an extension of your Asterisk PBX. We know it is always fun to find the right driver and proving that you can get your ISDN card to work, but it is cheaper and no trouble at all to set-up the Epygi ISDN VoIP Gateway.
A Quadro FXO is also available.