Proxima ASA 7911 - Manual (Page 57)

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You may also change the default settings for Parity, Number of
Stop Bits, and Number of Data Bits to match the settings of
your RS-232 application. The Serial Adapter will support any
combination of 7 or 8 data bits, 1 or 2 stop bits, and one of the
following parity settings: even, odd, mark, space, and none.
The Serial Adapter supports three Echo Modes: None, Simple,
and Terminal. When no Echo is selected, the unit will not Echo
the characters typed to the terminal screen. In the Simple Mode,
all characters typed are echoed to the screen, including carriage
returns. The Terminal Echo Mode specifies that the unit should
behave like a terminal by removing the most recent character
from the input stream upon encountering a backspace character
or beeping if backspace is pressed at the beginning of a line.
The Serial Adapter supports several Flow Control options:
Generate XON/XOFF, Recognize XON/XOFF, Generate CTS,
Generate DSR, Recognize DTR, and Recognize RTS.
A Serial Adapter will pass flow control pin values over the radio
to a remote Serial Adapter in order to simulate the activity of the
control pins of a null modem cable.
The Serial Adapters will pass control pin values as follows:
Local Serial Adapter Remote Serial Adapter
(initiated by host) RTS
→ → → → →
CTS
(initiated by host) DTR
→ → → → →
DSR
CTS
← ← ← ← ←
RTS (initiated by host)
DSR
← ← ← ← ←
DTR (initiated by host)
For example, when the attached RS-232 host asserts the RTS
pin, the Serial Adapter will send this information to the remote
Serial Adapter. In turn, the remote Serial Adapter will assert the