Configuring the traffic interfaces | 120
DCE to DCE Mode 4: RxC (X.21) - No overhead
(internal clocking)
DCE clocks
used
Clock passing Comment
RxC RxC is derived from the terminal
clock.
Suggested for X.21 Cloud Configuration.
Single clock X.21 system.
DCE to DCE Mode 5: XTxC → RxC - 40 kbit/s overhead
(Pass-through clocking)
DCE clocks
used
Clock passing Comment
RxC, TxC,
XTxC
XTxC is transported to RxC and TxC in
both directions
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