ISDN: Synchronous or Asynchronous? [7:5160]

Hello I have information that that LE (Local Exchange) provides clocking to the NT1 device. Does that mean ISDN uses Synchronous communication? Does that mean PPP and HDLC can be used in both synchronous and asynchrous communications? Thanks Lw Message Posted at: http://www.groupstudy.com/fo

Re: ISDN: Synchronous or Asynchronous? [7:5160]

>Hello > >I have information that that LE (Local Exchange) provides clocking to the >NT1 device. Does that mean ISDN uses Synchronous communication? Does that >mean PPP and HDLC can be used in both synchronous and asynchrous >communications? > >Thanks >Lw Neither; the ISDN signal itself is isoch