Network Technology tutorial Note (ISDN)

WAN and access Network technology Wide area network and access Network Technology common access technology--ISDN

The Integrated Services Digital Network (Integrated services digitally network,isdn) evolved from a telephony integrated Digital network IDN, providing end-to-end digital connectivity. Then it must be a wide range of business, including voice, non-word business and so on. It provides a set of wired standard and multi-purpose piping interfaces for customers to access the network.

ISDN is also divided into narrowband ISDN and broadband ISDN

When Narrowband ISDN is also widely used, broadband ISDN has emerged
Narrowband ISDN uses twisted-pair cables, while broadband ISDN uses cable

Network Technology tutorial Note (ISDN)