[c-nsp] Max length of 9600 serial over CAT5e

[Aaron]

Nom. Capacitance @ 1 KHz:15 pF/ft. for cat 5e

On Wed, Apr 8, 2009 at 07:31, Richard Halfpenny <
richard.halfpenny at exa-networks.co.uk> wrote:

> Sam Stickland wrote:
>
>>  Hi,
>>
>>  What's the maximum length of you can run async-serial (9600 baud)
>>  over CAT5e (from a terminal server to console port).
>>
>>  My google-fu has failed me.
>>
>
> If I remember correctly, the spec for RS-232 says the maximum capacitance
> of a cable can be 2500pF at 20kbps.  A Cat5e of approx 46pF / metre would
> give you a maximum length of 54 metres.  At 9600bps you could probably drive
> slightly longer.
>
> Rich
>
> --
> Network Operations
> Exa Networks Ltd :: AS30740
> richard.halfpenny at exa-networks.co.uk
>
>
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