A telecommunication equipment device in the form of a wall rack assembly used to accommodate a plurality of network interface units and used to interconnect a plurality of service lines of the network service provider with the customer's lines to serve as a demarcation point for legal tariff issues. The wall assembly includes a shelf assembly having at least two customer interface module connectors, each capable of receiving a detachable customer interface module, thus allowing flexibility in mounting in difficult to access areas, such as a corner of a room, closet, etc. In furtherance of the space saving and flexible mounting advantages, the wall assembly further includes a cover which can be installed and removed by lifting straight out away from the shelf assembly.