[AusNOG] TX/RX Conventions

[Matt Perkins]

 From my old Telecom days TX was on the left when facing upstream. (as 
in G.703 on coax)

Now where's my walking stick.



On 13/06/12 9:38 AM, Tony wrote:
> I just assumed that everyone does what we do. Plug it in one way, get 
> no link light, so switch TX/RX around, plug it in the other way. If 
> you've still got no link you go and check other stuff and then find 
> someone to blame for it not working (carrier not activating the port, 
> configuration on device wrong, etc).
>
> There's probably a standard for it somewhere. The below document has a 
> system for labelling them, not sure if thats a "standard" or something 
> that company/vendor uses as their way of doing things:
>
> http://www.ampnetconnect.com/documents/WHITEPAPER_Fiber_Polarity_Simplified_090813.pdf
>
> It appears TIA/EIA-568-B.1-7 might contain some relevant information.
>
>
> regards,
> Tony.
>
>     ------------------------------------------------------------------------
>     *From:* Tom Sykes <TomSykes at nbnco.com.au>
>     *To:* "ausnog at ausnog.net" <ausnog at ausnog.net>
>     *Sent:* Wednesday, 13 June 2012 8:21 AM
>     *Subject:* [AusNOG] TX/RX Conventions
>
>     Hi,
>
>     I'm interested to understand which conventions/standards (if any)
>     are being used by operators to identify the TX/RX in fibre
>     patching panels/trays - in environments like a meet me room or
>     datacentre.
>
>     For example, if someone is allocated ports 3&4 some operators seem
>     to use the "low" port as the TX, while others use the low port as
>     the RX. Also interested to understand whether the convention
>     specifies whether the TX/RX is egress from the port or is
>     specifying the signal into the port.
>
>     Thanks.
>     Tom
>
>
>
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