AT&T 3B2/300 Technical Reference Manual page 135

- - - - - - - - - - - - - - - - - - - - - - - - - - - EQUIPMENT DESCRIPTION
CM518B System Board
CM518B System Board Layout
Figure 2-26 shows the layout of the component side of a typical CM518B System Board. The
system board is a multilayer board measuring 14.8 inches wide by 7.7 inches deep. All system board
interfaces are connectorized as follows:
• CONSOLE and CONTTY RS-232C Ports (J4 and JS)
• Alternate CONSOLE and CONTTY RS-232C Ports (Jl)
• Backplane Connector (J2).
The following major components on the system board are connectorized:
• Read Only Memory (ROM) (four Dual Inline Packages)
• WE 32200 Microprocessor Central Processor Unit (CPU)
• WE 32201 Memory Management Unit (MMU)
• WE 32206 Math Acceleration Unit (MAU).
EQUIPMENT DESCRIPTION 2-111