Overview

The ERM-DXC is a Rack Type E1 Digital Cross Connect for Fractional E1 network access which is nested in a hub and provides an economic solution for central site users. There are 11 slots available for ERM-DXC I/O cards for installation into the ERM-DXC rack. A CPU card is installed into the last slot for configuration and management. The CPU card provides both local control via an RS-232 craft port and remote management using proprietary NMP software. Each MUX-E1 card may be linked to another ERM-DXC Rack to provide the main function of a DDN network. The ERM-DXC optionally accommodates up to two separate power supplies, which may derive power from AC (110/220) or DC (-48V) power sources. When two power supplies are installed, the modules provide power sharing and are hot swappable even during the E1 cards´ transmission. The ERM-DXC provides all interface connections on the rear panel. BNC and RJ-45 are used for E1 Line interface connection, while optional cable adapters are used to convert the DB-62F DCE ports of the I/O cards to V.35, RS-530, RS-449, RS-232 or X.21. When cards are inserted in slots, LEDs will show the Line status on the front panel.RS-530, RS-449, RS-422, X.21 and X.50. When cards are inserted in slots, LEDs will show the Line status on the front panel.