Re: 120 km and 1000Base-ZX

Another good non-Cisco source.

http://www.finisar.com/optical_modules

On Thu, Jun 3, 2010 at 10:13 PM, Radioactive Frog <pbhatkoti_at_gmail.com> wrote:
> well, Cisco does have very good Optical solution
> http://www.cisco.com/en/US/products/hw/optical/index.html
>
> But hey it cost $$$$
>
> If you just have one site, go for standalone xWDM solution
>
> Cisco's ONE-15xxx series is really killer and if you're teleco that is
> different thing.
>
> On Thu, Jun 3, 2010 at 11:38 PM, Martijn Minis <martijn.minis_at_gmail.com>wrote:
>
>> Hi Maher,
>>
>> You might want to check this page:
>>
>>
>> http://www.cisco.com/en/US/prod/collateral/modules/ps5455/white_paper_c11-463661.html
>>
>> It *might* be possible to do using the correct CWDM optics (they
>> should cost the same as standard ZX), but it might be best to ask the
>> company that created the fiber connection for a measurement report. If
>> you have this, combined with the optics specs you could do the
>> measurement (shameless copy from above link):
>>
>> Link Budget for WDM and Amplified Transmissions over Single-Mode Fibers
>> In the case of WDM transmissions, passive modules are used to
>> multiplex and demultiplex various wavelengths respectively before and
>> after the signal propagates along the fiber channel. These passive
>> modules introduce additional insertion losses suffered by the signal
>> transmitted.
>> Additionally, the signal may be amplified and compensated for
>> dispersion, and in this case, the amplifier gain and the dispersion
>> compensation unit's loss need to be taken into account. Dispersion and
>> OSNR penalties suffered by the receiver shall be considered as well.
>> Therefore all the parameters needed for a proper link budget evaluation
>> are:
>>
>> The minimum transmit power guaranteed (minTx), expressed in dBm
>>
>> The minimum receive power required (minRx), expressed in dBm
>>
>> The loss of optical connectors and adapters (L), expressed in dB
>>
>> The number of connectors and adapters (n)
>>
>> The normalized fiber loss (FL), expressed in dB/km
>>
>> The reach or distance to be achieved (d), expressed in km
>>
>> The loss of passive add/drop modules (A and D), expressed in dB
>>
>> The gain of the amplifier (G), expressed in dB
>>
>> The penalty suffered by the receiver (P), expressed in dB
>>
>> The loss of a dispersion compensation unit (DCU), expressed in dB
>> With these parameters, (LB) is given as for previous cases:
>>
>> (LB) = (minTx) - (minRx)
>> And the total loss is expressed as follows:
>>
>> (TL) = n*(L) + d*(FL) + (A) + (D) - (G) + (DCU) + (P)
>> Here again, if (LB) is greater than (TL), then the physical deployment
>> is feasible.
>>
>>
>> I haven't made such calculation before, but I might guess someone else
>> on the list has!
>>
>> Kind regards,
>>
>>
>>
>>
>>
>> On 3 June 2010 15:03, ccielight cisco <ccielight_at_gmail.com> wrote:
>> > Hello guys,
>> >
>> > I would like to bring up my connection between two site A to B and
>> distance
>> > is 120 km. The 1000Base ZX is only 70 km and can reach the maximum of 100
>> km
>> > so it is not applicable here.
>> >
>> > Any idea how to proceed ?
>> >
>> > Thanks in advance,
>> >
>> > Maher
>> > CCIE R&S
>> >
>> >
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>> >
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>>
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>
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Received on Thu Jun 03 2010 - 22:23:45 ART