If you're also doing 1310 does that mean there's a splitter cable inline with the passive mux? If so, some are cheap and don't filter well outside of the 1550 band. On Dec 12, 2013 10:23 PM, "Keith" <[email protected]> wrote:
> That is whats next. They took down the whole fiber instead of just the > 1471 wave to test > which killed transit...grrr.. > > They say their tx/rx are within spec. > > Next is jumpers and sfp swaps I guess. > > Thanks. > On 12/12/2013 6:40 PM, Sam Roche wrote: > >> If you have a CWDM optical power meter and light source, see if you can >> measure the power level on the receiving end and verify that it is within >> the spec of the SFP. Maybe it is a bad jumper or port on the 1471 receive >> on their end or send on your end. >> >> If the two switches can be brought to the same location, you might also >> want to connect them together using short jumpers, but make sure you have a >> power meter to ensure you use the proper attenuators to avoid burning out >> your optics. This would rule out your fiber and mux in case it an issue >> with an appliance or SFP. I've had CWDM SFPs burn out for no apparent >> reason twice now. >> >> *From: *Keith >> *Sent: *Thursday, December 12, 2013 8:11 PM >> *To: *[email protected] >> *Subject: *CWDM question >> >> >> CWDM question >> >> Hi. >> >> We are doing a fiber link between us and another SP using CWDM. >> >> There is traffic flowing just fine at the 1310 wave, and have recently >> added a >> 1471 wave. >> >> On the 1471 wave there are some problems with it. From our perspective, >> and we >> have packet captured this, we are transmitting data to them, but they say >> they >> are not seeing anything. We are receiving from them, and while we show >> that >> packets are leaving our interface to them, they are getting nothing at >> all. >> >> There are good light levels between the two locations and do not >> understand >> why they are not seeing traffic from us even though we are sending it. >> Our packet >> counters show we are transmitting to them and receiving from them. >> >> Is it possible to have RX and TX light and things appear to be ok, but >> have the >> RX on their side fubar in some way that it is not operating correctly in >> that our >> traffic is not reaching them? >> >> Thanks. >> >> >> >> >> >> >> >> > >
