Ummmm, he said 50 meters not 50 kilometers. 50 meters should easily be OK.
Priscilla
At 07:58 PM 9/20/01, David C Prall wrote:
> From the horses mouth:
>http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/6000hw/mod_inst/
>02prep.htm
>
>The minimum link distance for ZX GBICs is 6.2 miles (10 km) with an 8-dB
>attenuator installed at each end of the link. Without attenuators, the
>minimum link distance is 24.9 miles (40 km).
>
>With a 50m cable you should not be getting any kind of link and are most
>likely overdriving the Receive end.
>Therefore, when you do find a 40km long
>cable it may not work either.
>
>David C Prall [EMAIL PROTECTED] http://dcp.dcptech.com
>----- Original Message -----
>From: "Wang"
>To:
>Sent: Saturday, September 08, 2001 11:49 AM
>Subject: how to test the GBIC is 1000BASE-ZX. in GSR [7:19114]
>
>
> > Dear all :
> >
> > I 've are problem about testing cisco GBIC ZX in GSR. I just 've 50 M
> > single mode fiber.
> > Would you mind give me some information for test the GBIC.
> >
> > Story :
> > Our client 've order 3 GBIC for Three-port Gigabit Ethernet Card .
> > But, some problem in 2 GBIC can't pass connection test.
> >
> >
> > Test 1 )
> > I use the SC fiber cross at both GI port at e.g ( Gi2/0 to Gi 3/0).
> > The both 3GE-GBIC-SC status can not active & the all LED is off.
> > I 've try to sweep the TX & RX position and sweep to next Gigabit
> > Ethernet module..etc.
> > Still no response .
> >
> > Test 2 )
> > Next test, it test is use the one fiber cable only (single side). Make
> > the GBIC TX & RX in loop at single fiber. Just one GBIC can enable &
> > up. Other GBIC still is no response !
> > Remark : In this section the fiber have tested at both tx & rx is up.
> >
> > Our GBIC is 1000BASE-ZX.
> >
> > Following massage back from TAC:
> > ZX can reach about 70km, it is the most powerful one GBIC. Be sure to
> > use attenuator,
> > otherwise GBIC may be damaged by overpower level laser!!!
> >
> > In order to explain different performance from your 3 GBIC, I think we
> > can look at the tx
> > level of max 6db to min 0db. If the one tx 0db, certainly rx will below
> > 0db. If the other tx
> > 6db, 50m fiber is not enough to cause 6db loss, so interface is still
> > down and GBIC may be
> > damaged.
> >
> > 9/125um SM 1000Base-ZX SC
> > 6 tx max
> > 0 tx min
> > 0 rx max
> > -23 rx min
> > 70 km 42 mile
> > 1000Base-ZX can reach up to 100km (60mi) by using dispersion shifted SM
> > or low
> > attenuation SM
> >
> > Regards,
> > Eric,
________________________
Priscilla Oppenheimer
http://www.priscilla.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=20638&t=19114
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
