[AusNOG] TX/RX Conventions

[Jason Leschnik]

Which really translates to... Make a standard & Stick with it :)

On Wed, Jun 13, 2012 at 3:00 PM, Andrew Warburton
<andrew.warburton at aapt.com.au> wrote:
> Hey guys,
> No need to get too complicated, this is just Layer 1 ie. Physical layer, no
> rocket science required.
>
> Andrew
>
>
> On 13 June 2012 13:45, <john at netniche.com.au> wrote:
>>
>> On 13.06.2012 07:21, Tom Sykes wrote:
>>
>>> 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.
>>
>>
>> Hi Tom,
>>
>> I'm not aware of any convention other than the "flip it if it doesn't work
>> and curse shutdown-by-default policies".
>>
>> Cisco appear to place TX on the "left" of the optics (first port). The LC
>> connector specification chickens out from making a distinction, and the
>> SFP/SFP+ specifications also don't make a commitment (they allow for copper
>> and single-fibre, after all).
>>
>> From a purely logical point of view, TX should be on the "first" port of a
>> group. This is because it's difficult to test for the absence of a signal,
>> so if only 1 of two ports has a signal on it that should ideally be the
>> first one you try.
>>
>> Otherwise, you're condemning engineers everywhere to a sequence of try
>> port 1, nope, try port 2 - that's a 30 second gain in productivity for the
>> industry each time they plug in a patch lead :)
>>
>> John
>>
>> _______________________________________________
>> AusNOG mailing list
>> AusNOG at lists.ausnog.net
>> http://lists.ausnog.net/mailman/listinfo/ausnog
>
>
>
>
> --
> Andrew Warburton
> Business Development Manager | Wholesale
>
> AAPT Limited, 180 - 188 Burnley St Richmond, VIC 3121
> P +61 3 8308 3838 | M +61 426 779 333
>
>
> This communication, including any attachments, is confidential. If you are
> not the intended
> recipient, you should not read it - please contact me immediately, destroy
> it, and do not
> copy or use any part of this communication or disclose anything about it.
>
>
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> http://lists.ausnog.net/mailman/listinfo/ausnog
>



-- 
Regards,
Jason Leschnik.

[m] 0432 35 4224
[w@] jason dot leschnik <at> ansto dot gov dot au
[U@] jml974 at uow.edu.au