Main Distribution Frame (MDF)
Short for main distribution frame, a cable rack that interconnects and manages the telecommunications wiring between itself and any number of IDFs. Unlike an IDF, which connects internal lines to the MDF, the MDF connects private or public lines coming into a building with the internal network. For example, an enterprise that encompasses a building with several floors may have one centralized MDF on the first floor and one IDF on each of the floors that is connected to the MDF.
Read Also:
- MDI
(1) See Multiple Document Interface. (2) See medium dependent interface.
- MDIX
Short for medium dependent interface crossover (the “X” representing “crossover”), an Ethernet port connection that allows networked end stations (i.e., PCs or workstations) to connect to each other using a null-modem, or crossover, cable. Compare with MDI. MDIX is also referred to as an MDIX port.
- MDN
Short for Mobile Directory Number it is the specific phone number assigned to a mobile phone.
- MDRAM
Short for Multibank DRAM, a memory technology developed by MoSys Inc. MDRAM utilizes small banks of DRAM (32 KB each) in an array, where each bank has its own I/O port that feeds into a common internal bus. Because of this design, data can be read or written to multiple banks simultaneously, which makes it […]
- MEO
Short for medium, or middle, earth orbit, a satellite system used in telecommunications. MEO satellites orbit the earth between 1,000 and 22,300 miles above the earth’s surface. MEOs are mainly used in geographical positioning systems and are not stationary in relation to the rotation of the earth.