Dce / dte

NightShade03

Just wanted to clarify:

The DCE belongs to the service provider and the DTE is the end users router? Can't seem to find a good explanation on this so I figured I'd ask.

mrblackmamba343

DCE is the service providers end. DTE is your end. Routers by default are DTE equipments. Thats why if you use a crossover DTE/DCE cable you have to set the clockrate because by default routers do not provide clocking. That is the job of modems, CSU/DSU and channel banks

NightShade03

So the DCE, would be a CSU/DSU device that belongs to the service provider and its on this end (the DCE) where the clock rate would have to be set?

mrblackmamba343

NightShade03 wrote: »

So the DCE, would be a CSU/DSU device that belongs to the service provider and its on this end (the DCE) where the clock rate would have to be set?

clock rate is configured on the modem or CSU/DSU. Right now cisco makes VWIC/WIC cards that have the CSU/DSU interegrated into the card. So you don't have to get a sepeate CSU/DSU

For example if you are configuring a
WIC-1DSU-T1 this is how you will set the clock rate



Interface serial 0/0
service-module t1 clock source internal
service-module t1 timeslots 1-24 speed 64
service-module t1 framing esf
service-module t1 linecode b8zs
ip address 10.1.1.1 255.255.255.0
no shut

clock source can be internal or line depending on the connection.

For a VWIC/ T1

clock source would be set this way

controller t1 0/1
clock source line
frame esf
line code b8zs