3Com NBX Call Processor 3C10110D The 3Com NBX 100 Call Processor (3C10110D) is the foundation of the 3Com NBX 100 phone system, managing all incoming and outgoing call traffic. Card includes a 10BASE-T MDI-X uplink port and one 10BASE2 BNC expansion connector. It is also an application server for the APX Messaging System, embedded Web server, and other onboard and external application hosting and connectivity. Card includes a 10BASE-T MDI-X uplink port and one 10BASE2 BNC expansion connector. Telephony adjunct connectors for Music on Hold, Paging, External Alerts, plus the system hard disk kit.