Wang 5536 - Functional Overview; Functional Description

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Connection of a workstation to a modem is by an RS-232 cable between the
modem and the modem connector on the workstation. If the modem is supplied •
by the telephone company, the connection of the modem to the line is made
by them (figure 2-10).
MODEM
5536
WORKSTATION
RS-232
INTERFACE
MODEM
PRIVATE LINE OR
PUBLIC DIAL NETWORK
REMOTE •
SYSTEM
OR
TERMINAL
Figure 2-10 TC Connection Diagram
2.4.2 FUNCTIONAL OVERVIEW
TC logic resides on one circuit assembly, PCA 210-7541. The major logic
functions are:
o USART (Conversion)
o Data Input/Output
o Decoders
o Modem Interface
These functions are connected to the CPU by the System Address Bus and the
Sys tern Data Bus •
2.4.3 FUNCTIONAL DESCRIPTION •
This section provides descriptions of major TC logical functions. Figure
2-11 shows the major blocks on the PCA.
2-18