ATLAS 890 System for TDM, ISDN, and Frame Relay applications. Modular system includes one Controller Card, one DC Power Supply, and 16 option module slots for ATLAS 800 Series modules or an additional 890 Power Supply. An additional controller card slot is also provided. The Controller card includes a 10/100BaseT Ethernet port, an EIA-232 ADMIN port (RJ45), and Frame Relay/PPP software. 890 chassis is 6 RU high (10.5") and 11.5" deep, and can be installed in a 19-inch or 24-inch rack with included mounting brackets (also stand-alone.) 890 Chassis also includes alarm contacts, an EIA-232 craft port (RJ45), a RJ45-DB9 adapter, and a RJ45-DB25 adapter.