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INTRODUCTION
The 8 Position Code Activated Switch,
Model 8P-MAS
allows one master RS-232 port to be selectively
switched to any of eight RS-232 devices, designated A through H. Typically the 8P-MAS is used to
allow one modem to access the configuration or out-of-band management ports of eight remote devices
(see Figure 1A). Three modes of operation allow the selection of the port to be connected.
Menu Selection
The 8P-MAS selects the port to connect to the master port based on menu selections.
The menu system allows convenient naming of each port, and setup of all 8P-MAS
parameters.
Lead Control
This option allows any of the eight ports to access the master port by raising its
Request To Send (RTS) or Data Terminal Ready (DTR) control lead. This capability is
in addition to the menu selection as described above.
Manual Control
A front panel push-button allows local control of port selection.
There are eight LED's on the front of the 8P-MAS to indicate which port is connected to the master.
There are eight DB25S female connectors on the rear panel for the switched ports, (designated A-H)
and one DB25P male connector for the Master Port. Figure 1 illustrates a typical system using the 8P-
MAS.
External
Modem
Master
Port
A
B
C
H
G
F
E
D
To 8 DTEs
Master DCE
A B C D E F G H
POWER
MANUAL
REF: M\MANUALS\CAS\8PMAS_V980327R.DOC
8 Position Menu Activated Switch
Model : 8P-MAS
Operation Manual
