Integrated Services Digital Network (ISDN) is a technology that allows digital communication over a traditional analog phone line, so both voice and data can be digitally transmitted over the PSTN. ISDN never had the popularity that it was expected to have because it came along at a time when other alternative technologies were developed.
There are two flavours of ISDN:
- ISDN BRI (Basic Rate Interface)
- ISDN PRI (Primary Rate Interface)
The ISDN-speaking devices are called terminal emulation equipment and the devices can be categorised into native ISDN and non-native ISDN equipment. The . . .
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