18
SECURE RACK MODEM
4.2 Setup Switches
The setup switches, located on the back panel, select the default settings for
Modem Port baud rate, flow control, parity, rings to answer, and enable or disable
ARQ/Compression, the modem speaker, and the modem’s Security Mode.
NOTE
You can also select operating values for all of these parameters via the
modem’s configuration menus. However, if you reset the modem to
default parameters, these settings will return to the default values
selected by the Setup switches.
4.2.1 D
EFAULT
M
ODEM
B
AUD
R
ATE
(SW1, SW2)
Setup switches #1 and #2 select the default baud rate for the Secure Rack Modem’s
internal modem and the serial modem port. You can also select the modem’s
baud rate via the Modem Parameters menu (/M). If you reset the unit to default
parameters, the modem baud rate will return to the default setting selected by
setup switches #1 and #2.
NOTE
Automatic baud rate sensing is disabled, so the modem can function
with devices that do not send an AT command string.
Table 4-1. Modem baud rate switch settings
Default Modem Baud Rate
SW1
SW2
9600 bps*
DOWN
DOWN
38.4 kbps
DOWN
UP
19.2 kbps
UP
DOWN
2400 bps
UP
UP
*Default setting.
4.2.2 D
EFAULT
F
LOW
C
ONTROL
F
ORMAT
(SW3)
Setup switch #3 selects the default flow control (handshaking) format for the serial
modem port. The flow control format for the serial modem port can also be
selected via the Modem Parameters menu. You set the flow control format for the
internal modem itself using AT commands as described in
Chapter 9
. If you reset
the unit to default parameters, the flow control format will return to the default
setting selected by setup switch #3.