NBX 100 Core Components 27NBX 100 CallProcessorThe top active slot in the primary NBX 100 chassis holds the NBX 100 CallProcessor. The NBX 100 Call Processor:■ Manages call traffic, voice mail, and the Automated Attendant■ Supports the Telephony Application Programming Interface (TAPI) 2.Xfor Computer Telephony Integration (CTI) applications■ Includes an Internet Messaging Access Protocol 4 (IMAP4) messageserver for integration of voice mail and e-mail and a web server tosupport web-based system administration■ Supports all NBX line cards■ Supports up to 200 devices. See “System Configuration Guidelines”on page 47 for the rules about supported devices.There are two versions of the NBX 100 Call Processor, shown in Figure 4and Figure 5.Figure 4 NBX 100 Call Processor (3C10110C)Figure 5 NBX 100 Call Processor (3C10110D)The difference between the 3C1011C and the 3C1011D is that the3C10110C Network Call Processor includes a BNC connector for uplinkconnections.The NBX 100 Call Processor has these status lights and connectors:■ Status Lights — The three status lights (S1, S2, and S3) indicate:S1 and S2 — Indicate operating system status.■ If S1 and S2 are both flashing (approximately 2 flashes per second),the hardware is initializing.■ If S1 is on and S2 is off, the operating system has startedsuccessfully.OLVS3S2S1MOH COM 1 COM 2PAGING EXT. ALERT 10BT UPLINKBNC 10B2 MDI-X3C10110C 3Com NBX Call ProcessorOLVS3S2S1MOH COM 1 COM 2PAGING EXT. ALERT 10BT UPLINKMDI3C10110D 3Com NBX Call Processor