I've located the Cisco spec for distance for the 100FX mod on Single
Mode, which is 10Km.
I assume you're connecting on the Cisco side to an MTRJ port? And,
you're using Single mode from the port through the patch, and across the
long run? If this is the case, I'm not sure what the issue is. You'd have
to measure the optical power to determine the loss. Finally, I'd suspect
the difference in optical vendor parts. We already know there's a mismatch
in distance, 10Km versus 15Km You could "half split", if you had a second
media converter, to check things with.
Logical Solutions for Integration
Clarity in an Unclear World
> > Kott,
> > You'll likely need to use the media converters in pairs, as the
> > 100FX side is only able to reach 2Km on Multimode. You don't mention
> > this was your initial install, and this has ever worked, so I presume it
> > new, and has yet to operate correctly.
> > Most Long Haul (LH) implementations are vendor specific (not
> > standard), and at the very least, the fiber tranceiver discreet
> > should be made by the same vendor. LH for Fast Ethernet is not a
> > Even though it is standardized for Gigabit, it's still recommended to
> > the same vendor (even to the revision level) for each side of the fiber
> > link. Especially at longer distances.
> > I don't think there's any way around your need for a second
> > transceiver, though you may choose to use the 100FX to 100FX (LH) media
> > converter for your use. It may be more expensive than using the
> > 100TX-100FX(LH) converter, and use a copper port on the Cisco switch.
> > Good luck!
> > George Johnston
> Hello George -
> The specs on 6509 Fiber Port ( I am told)
> Single Mode Fiber LX/LH
> 1300 nm -- Wavelength
> -20 to -14 dbm (8.3/9/10 Micron SMF) -- Transmit Power
> -31 to -8 dbm -- Receiver Sensitivity
> Distance Range :??
> The Specs on the Media Converter Fiber Transceiver is
> Single Mode Fiber
> Launch Power is -15dbm to -8dbm
> 1300 nm - wavelength
> -32 to -7.5 dbm - RX Sensitivity
> Distance Range :15kms
> I have not measured the optical losses on the line( currently 4 km
> > Logical Solutions for Integration
> > Clarity in an Unclear World
> > > > >>>I have a 2 port Media Converter, 100B-FX to 100B-Tx.The fiber
> > > > >>>connected to a Cisco 6509 100B0Fx port. The Fiber distance is
> > 4
> > > > >>>kms.
> > > > >>>On the Media converters I see Rx Symbol errors on the Fiber
> > > > >>>question is what does Rx Symbol Errors mean ?
> > > > > 4km seems long. Maybe you have exceeded the distance limit for
> > > > > units. What distance are they rated for?
> > > > I wondered about that as well. Officially 100BASE-FX is rated for
> > > > Regards,
> > > > Marco.
> > > Hello -
> > > The Media Converter on the fiber side is single mode ,with 15kms range
> > > (1300nm).
> > > The Cisco 6509 fiber Port is Single Mode 100B-FX (I am told )
> > > I have not been able to verify the Cisco 6509 FX Port , but does
> > > anybody have any info about the modes the Fiber supports on the 6509
> > > switch ?
> > > Also is there a standard for 100-LX/LH fiber for fast Ethernet ?
> > > Thanks
> > > Kott