OADM (Optical Add/Drop Multiplexer)

In wavelength division multiplexing (WDM) a device

that is able to add or drop individual wavelengths without separating all wavelengths and certainly without converting them to electrical format. An OADM is a purely optical version of an ADM. See also ADM, wavelength, and WDM.

• database
• data circuit terminating equipment (DCTE or DCE)
• data communications equipment (DCE)
• data compression
• Data Encryption Standard (DES)
• Data Exchange Interface (DXI)
• data field
• data file
• data format
• datagram
• datagram
• datagram service
• datagram service
• Data Interchange Standards Association (DISA)
• Data Link Connection Identifier (DLCI)
• Data Link Layer (DLL)
• Data over Cable Service Interface Specification (DOCSIS)
• DataPhone
• data service unit (DSU)
• data set or dataset
• data terminal equipment (DTE)
• Data Under Voice (DUV)
• dB (decibel)
• dB/km (deciBels per kilometer)
• dBm (deciBels referenced to a milliWatt)