Re: 120 km and 1000Base-ZX

Ohh... very interesting..
thank you so much for your help

On Thu, Jun 3, 2010 at 4:23 PM, WorkerBee <ciscobee_at_gmail.com> wrote:

> 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
> >> >
> >> >
> >> > Blogs and organic groups at http://www.ccie.net
> >> >
> >> >
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> >
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Received on Thu Jun 03 2010 - 16:28:38 ART