Chapter 1: Introduction to the EIU 29

RAM. The NTEX22CA provides 32 Mbyte of RAM and higher throughput performance.

NTEX22 also contains a peripheral bus (P-bus) to F-bus interface. The P- bus to F-bus interface connects the processor bus with the frame bus, which in turn is connected to the local message switch (LMS) through the rate adaptor.

The IPF card is a common processor card used by almost all ASUs and runs the Support Operating System (SOS).

Figure 4 Link interface shelf, with 2-slot EIU locations

Top view of LIS shelf

2-slot ASU

Rear paddle boards

NT9X85 Ethernet AUI PB

2-slot EIU

Front cards

NT9X84 Ethernet interface card

NTEX22 Integrated processor and F-bus card

DMS-100 Family EIU User Guide TELECOM12

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Image 29
Cabletron Systems DMS-100 manual Rear paddle boards, Slot EIU, Front cards