[c-nsp] Where do you put the optical attenuators?

[Jonny Martin]

The most important reason for putting them on the RX side is that you  
are protecting that which needs to be protected - the receiver in  
your optics.  This way you know that you're not going to potentially  
blow the receiver in your optics by plugging in too large a signal  
because you assumed there was an attenuator on the TX at the far end,  
and there wasn't.

Cheers,
Jonny.


On 27/10/2007, at 9:27 AM, John Souvestre wrote:

> Hi Tassos.
>
> I would think that putting them on the receiver side would be  
> best.  This way
> they will attenuate the noise along with the signal.
>
> John
>
>     John Souvestre - Southern Star & Integrated Data Systems -  
> www.sstar.com
>
>
>> -----Original Message-----
>> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
>> bounces at puck.nether.net] On Behalf Of Tassos Chatzithomaoglou
>> Sent: Friday, October 26, 2007 8:31 AM
>> To: cisco-nsp
>> Subject: [c-nsp] Where do you put the optical attenuators?
>>
>> Does anyone know if in-line optical attenuator have to be  
>> connected on the
>> receiver side only?
>>
>> For example in the following link
>>
>>
>>     A---------------------C
>> SW1                      SW2
>>     B---------------------D
>>
>> SW1 is transmitting through A and receiving through B
>> SW2 is transmitting through D and receiving through C
>>
>> Where is the best place to put the attenuators? B & C?
>> Can i put them on A & B?
>>
>> I did some tests putting them on every possible side (as long as  
>> there is one
>> on each fiber strand) and all of them worked, but i
>> was wondering if there is a best practice about them.
>>
>> --
>> Tassos
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