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CHAPTER 9: DIP-Switch Settings
Switch #2
Flow Control - &E4/&E5
(Asynchronous Mode/Leased Line/Dial-Up)
With Hardware Flow Control, the modem uses its RS-232C/V.24
interface to control the flow of data from the computer or terminal to
which it is attached. The CTS signal on Pin 5 of the RS-232C/V.24 is
brought low to stop the flow of data, and is brought high to restart it.
Place DIP-Switch #2 in the UP position to enable Hardware Flow
Control (&E4). Xon/Xoff Flow Control (&E5) is another flow control
method. Xon/Xoff characters in the data dictate the start and stop of
data flow from the computer or terminal. Place DIP-Switch #2 in the
DOWN position to select Xon/Xoff Flow Control.
Hardware Flow Control (&E4) = Switch #2 UP
Xon/Xoff Flow Control (&E5) = Switch #2 DOWN
Factory Default Setting = UP
Switch #2
SDLC/BSC Option
(Synchronous Mode/Leased Line/Dial-Up)
Synchronous Data Link Control (SDLC) and Binary Synchronous
Control (BSC) are two error correction protocols used in the IBM
Mainframe environment. Place DIP-Switch #2 in the UP position to
enable SDLC mode, and place DIP-Switch #2 in the DOWN position to
enable BSC mode.
SDLC Mode = Switch #2 UP
BSC Mode = Switch #2 DOWN
Factory Default Setting = UP