PRI Card is a digital truck line that is provided by telecom service which enables a user to connect 30 calls simultaneously incoming/ outgoing calls using a single line. A PRI or Primary Rate Interface is an end to end digital telecommunication which allows transmission of voice, calls, data or video between network and user. It is the most common technology used for business communication.
A PRI Card is used to connect PRI lines to IP PBX telephony server which helps the IP Phones/ Analog Phones in making both incoming and outgoing calls. The PRI Cards are generally inserted into PCI 3.3V/ PCI 5V/ PCI Express (empty) Slots in the server. PCI interface. PRI Card contains 1, 2 or 4 Slots which will be used to connect 1, 2 or 4 PRI lines. There are some PRI Cards which is come with echo cancellation to reduce the echo generated when Digital Signals are converted to IP & vice versa