what does DCD Down mean?

[JRodz]

What does DCD down mean? I get this when I do a sh int in my cisco 7000 router.

All the other ones are up, except this one and i believe this is why this interface is down. Can anyone help?

JR

 

[mesagreg]

I'm sure you already have an answer to your question, but DCD is Data Carrier Detect. When this is up, the router has detected the presence of a carrier signal.

HTH, Gregory A. Lusk, P.E., CCNA

 

[jgercken]

This signal is generated by the DCE device (modem) when it detects that it has established a connection with the remote DCE device (other modem). It should only come up after the modems have negotiated speed, parity, etc.


Others
RTS -request to send
CTS -clear to send

DTR -data terminal ready
DSR -data set ready

TxD, RxD & Ground are self explanitory

-Jeff

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