R3303-HP HSR6800 Routers Interface Command Reference

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dteclk2: Sets the interface clock selection mode to DTE clock option 2.
dteclk3: Sets the interface clock selection mode to DTE clock option 3.
dteclk4: Sets the interface clock selection mode to DTE clock option 4.
dteclkauto: Sets the interface clock selection mode to DTE auto-negotiation.
dceclk1: Sets the interface clock selection mode to DCE clock option 1.
dceclk2: Sets the interface clock selection mode to DCE clock option 2.
dceclk3: Sets the interface clock selection mode to DCE clock option 3.
Usage guidelines
In DTE mode, the synchronous serial interface supports the clock { dteclk1 | dteclk2 | dteclk3 | dteclk4
| dteclkauto } command. In DCE mode, the synchronous serial interface supports the clock { dceclk1 |
dceclk2 | dceclk3 } command.
A synchronous serial interface can operate as DCE or DTE.
• As DCE, the interface provides DCEclk clock to the DTE.
• As DTE, the interface accepts the clock provided by the DCE. Because transmitting and receiving
clocks of synchronization devices are independent, the receiving clock of a DTE device can be
either the transmitting or receiving clock of the DCE device, so is the transmitting clock. Therefore,
five clock options are available for a DTE device.
Figure 1 Select a clock for a synchronous serial interface
In the figure, "TxClk" represents transmitting clock, and "RxClk" represents receiving clock.
Table 14 de
scribe the four clock selection options for a synchronous serial interface working as DTE and
DCE, respectively.
Table 14 Clock options available for a synchronous serial interface working as DTE
Clock selection o
p
tion Descri
p
tion
DTEclk1 TxClk = TxClk, RxClk = RxClk.
DTEclk2 TxClk = TxClk, RxClk = TxClk.
DTEclk3 TxClk = RxClk, RxClk = TxClk.
DTEclk4 TxClk = RxClk, RxClk = RxClk.
In the table, the clock preceding the equal sign (=) is the DTE clock and the one that follows is the DCE
clock.
Table 15 Clock options available for a synchronous serial interface working as DCE
Clock selection o
p
tion Descri
p
tion
DCEclk1 TxClk = Local, RxClk = Local.
DCEclk2 TxClk = Local, RxClk = Line.