The main functions of the MDODF (and mounted subracks) are to provide: a managed standard fibre installation, reticulation, interconnection, distribution, re-arrangement and maintenance activities at a common point. It also allows for fibre testing and fault finding activities. The MDODF is usually located at the end of a suite of equipment racks. The MDODF can also be installed back to back or side by side at a MOF installation.
MDODF’s hold up to 9 x splice/patch subracks, where outdoor/external optical fibre cables are fusion spliced to pigtails, that connect to patch cords at a patch panel. The patch cords subsequently connect to transmission equipment, located in the adjacent suite of racks.
A major feature of the subrack is the minimum amount of movement that occurs to loose tubes and optical fibre cords, as the subrack opens and closes. This ensures a very high degree of protection for working services. Also, the fusion splices and pigtails are located in a protected position, because there is very little chance of them being disturbed when patch cords are being installed, as the subracks tray only needs to be opened a very small amount.