0votes
1 answer
121views
CWDM link: 1310 nm channel works, new 1471 nm channel carries no traffic despite good light levels
Two service providers shared a fibre with CWDM multiplexers. The existing 1310 nm channel worked, but after adding a 1471 nm channel the transmitting side saw frames leave (confirmed with packet captures) while the far end received nothing, even though light levels looked normal. The provider had…