Re: 120 km and 1000Base-ZX

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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Received on Fri Jun 04 2010 - 00:13:51 ART