Cant bring up serial interface

I am using Cisco 2503 and tried everything. I assigned Ip address, and no shutdown command. but still sh int s0 says that my interface is down. Can anyone tell me what could be reason for that.

Thanks,
Bhushan

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EdTheLad

#show controllers serial 0

If this is a DCE you need to specify clock rate on the interface.
#config terminal
router(config)#int s0
router(config)#clock rate 64000

If the output of the #show controllers serial 0
says no cable you have a physical cable problem!

Initially even I had this problem.

As ed_the_lad had mentioned set the clock rate.

If you are using encapsulation other than the default ones on the cisco routers, check the encapsulation type.

Does the sh s0 displays “interface up, line protocol is down”

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