>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 isochronous. But a TA can present
either a synchronous or asynchronous interface.
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