Answer
Jun 16, 2025 - 07:09 AM
E1 and PRI are both digital telecommunication standards used for transmitting multiple voice and data channels over a single physical line. E1 is a standard primarily used outside of North America and Japan, offering 32 channels, of which 30 are used for voice or data, one for framing, and one for signaling. PRI (Primary Rate Interface), on the other hand, is a type of ISDN service that uses the E1 standard in regions outside North America, providing 30 B-channels for data and voice and two D-channels for signaling and control, while in North America, it uses the T1 standard, offering 23 B-channels and one D-channel.
