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.