Overview

The ERM-MUX/PLUS is a Rack Type E1 CSU/DSU Time Division Multiplexer for Fractional E1 network access which is designed for non-stop operation and provides an economic solution for central site installations. There are 10 slots available for hot-swappable ERM-MUX/PLUS-I/O cards for installation into the ERM-MUX/PLUS Rack. Two slots are provided for MUX-E1 cards, which may be configured as four separate E1 links or for redundant 2+2 operation of the E1 lines, safe guarding against expensive network down time. Two slots are also available for CPU cards, with the second CPU card acting as a hot stand by in case of primary card failure. Each MUX-E1 card may be linked to another ERM-MUX/PLUS Rack to provide a variety of Datacom & Voice over E1 network services. The ERM-MUX/PLUS 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 complete power redundancy and are hot swappable even during the E1 cards´ transmission. The ERM-MUX/PLUS provides all interface connections on the front panel. BNC and RJ-45 are used for E1 Line interface connections, RJ-45 connections are used for all voice (FXO, FXS, E&M), for 10/100 Ethernet Bridge and G.703/64K Co-directional. Optional cable adapters are used to convert the DB-62F DCE ports of the I/O cards to RS-232 or HP68F DCE port of I/O card to V.35, RS-232, 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.