DCE
DCE/DTE
- DCE/DTE are two sides of a Serial connection.
- The DCE (Data Circuit-terminating Equipment, Data Communications Equipment, or Data Carrier Equipment) transmits the clock signal and controls the clock rate
- The DTE (Data Terminal Equipment) receives the clock signal
- In short:
- DCE Transmits the clock signal and controls the clock rate
- DTE Receives the clock signal
Clock rate only needs to be configured on the DCE
# sho controllers
R1(config-router)# do sho controllers s0/0/0
Interface Serial0/0/0
Hardware is PowerQUICC MPC860
DCE V.35, clock rate 128000
idb at 0x81081AC4, driver data structure at 0x81084AC0
SCC Registers:
General [GSMR]=0x2:0x00000000, Protocol-specific [PSMR]=0x8
Events [SCCE]=0x0000, Mask [SCCM]=0x0000, Status [SCCS]=0x00
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
The DCE V.35 indicates that R1 is the DCE in the pair, and controls the clockrate