Long time since I've messed with the Mux's, but thought I'd have a go as
replies seem to be a little scarce.
At the very worst you can console yourself with the fact that you're not the
only one who hasn't got a clue.
Not sure whether you were aware that both CTS and DCD are both originated by
the DCE, and depending on the flow control set up, are reliant on the
distand end MUX. Do you have a good circuit to the distant mux?
Or, do you have a X21 breakout box so you can force DCD and CTS to see if
this brings the circuit up.
Failing that you could connect DTR to DCD and CTS at the router to see if
that brings it up.
So in answer to your question, CTS being low, probably isn't the reason for
DCD being low. It is more likely that there is a problem with the MUX config
or the link which is causing both to be low.
Regrds,
Gareth
""Shoaib Waqar"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Dear All,
>
> I am currently experiencing a issue regarding
> connectivity of Cisco Router 2511 with Multiplexer
> (MUX) which is acting as a DCE device. The MUX is
> providing clock, as it is shown at router's console by
> entering 'show controller ser 0' but the DCD never
> comes up. I have checked the pin configuration by
> surfing on Cisco cable specification doc of X21 DTE
> cable(DB15 connector) and found that the cable is not
> getting CTS from MUX, so am i rite in guessing that
> this might be the main cause of DCD not coming up??
> can anyone plz help ?? i will highly appreciate it
>
> Shoaib Waqar
> CCNP,MCSE,CIPT
>
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