abbr.综合业务数字网(=Integrated Services Digital Network)
However, ISDN did not prove to be a blockbuster. 然而，ISDN没有证明它是一种威力无比的东西。
ISDN is usually named as a one-line link. ISDN通常被称为一线通。
ISDN subscribers need special modems. isdn的用户需要特殊的modem。
However,ISDN did not prove to be a blockbuster. 然而，ISDN没有证明它是一种威力无比的东西。
A PBX can also work with analog or ISDN lines. PBX还可以与模拟或ISDN线路一起使用。
