The H-OADM1x4-xxx-yyy-4C is a single-sided 4ch DWDM add/drop filter, designed to support 400G 16QAM signals due to its wide channel bandwidth. This filter is part of the 400G compatible filter range, as indicated by the "-4C" suffix in the product code. The product range includes ten different filters, collectively covering the 40ch DWDM band from 921 to 960.
Each filter features four add/drop ports, a Line port, and an Extension port. The Line port should always be directed towards the connection. Channels that fall outside the add/drop channel bands are passed through the filter. The Extension port has a broad range, covering 1264 -1630nm, allowing for a multitude of LANWDM, CWDM, DWDM, and OTDR solutions to be used on the same infrastructure. The bandwidth can even reach up to 1670, albeit with a slightly higher loss.
The monitor ports (Mon) are designed to tap off 1% of the transmitted and received Line signal, enabling the monitoring of channel power levels via a connected Optical Channel Monitoring (OCM) device or an optical spectrum analyzer. The DWDM channels are in compliance with ITU-T G.694.1. The ten different filters cover the channel band from 921 to 960, with specific models including H-OADM1x4-921-924-4C, H-OADM1x4-925-928-4C, H-OADM1x4-929-932-4C, H-OADM1x4-933-936-4C, H-OADM1x4-937-940-4C, H-OADM1x4-941-944-4C, H-OADM1x4-945-948-4C, H-OADM1x4-949-952-4C, H-OADM1x4-953-956-4C, and H-OADM1x4-957-960-4C.