Switch Setting - Modem A - Patton electronics 2085RC User Manual

S1-3: Carrier Control
The setting for switch S1-3 determines whether the carrier is
"Constantly On" or "Controlled by RTS". This setting allows for opera-
tion in switched carrier, multipoint and/or hardware handshaking appli-
cations.
S1-3 Setting
On Controlled by RTS
Off Constantly ON
S1-4: Echo Mode
The setting for switch S1-4 determines whether the Model 2085RC
echoes data back to the transmitting device (half-duplex mode only).
S1-4 Setting
On Echo On
Off Echo Off
SWITCH SET "S2"
DIP switch S2 is used to configure transmit impedance, and
2-wire/4-wire operations. The summary table below shows the factory
default settings for switch S2. Following the summary table is a
detailed description of each individual switch.
SWITCH S2 SUMMARY TABLE (factory defaults in bold)
Position Function
S2-1* TX OFF Impedance
S2-2* TX OFF Impedance
S2-3*
2-Wire/4-Wire
S2-4*
2-Wire/4-Wire
*Note:
Switches S2-1 and S2-2 must be switched simultaneously.
Switches S2-3 and S2-4 must be switched simultaneously.
ON Position OFF Position
Intermediate High
Intermediate High
2-Wire 4-Wire
2-Wire 4-Wire
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S2-1 and S2-2: "Transmit Off" Impedance
Switches S2-1 and S2-2 are set together to determine whether the
receiving device "sees" the impedance of the Model 2085RC's transmit-
ter as being "high" or "intermediate" when the transmitter is turned off.
The "intermediate" setting is useful in half-duplex environments where
the receiving device does not respond well to the "high" setting.
S2-1 S2-2 Setting
On On Intermediate Impedance
Off Off High Impedance
S2-3 and S2-4: 2-wire/4-wire Modes
Switches S2-3 and S2-4 are set together to determine whether the
Model 2085RC is in 2-wire or 4-wire operating mode. Note: 2-wire
mode is half-duplex only.
S1-2 S1-3 Setting
On On 2-wire mode
Off Off 4-wire mode
3.1.2 SWITCH SETTINGS - MODEM "B"
DIP switches S3 and S4 configure converter B on the Model
2085RC front card. The tables below provide an overview of converter
B switch settings, including factory default settings. Following each fig-
ure is a detailed description of each switch's function.
SWITCH SET "S3"
DIP switch S3 is used to configure receive impedance, RTS/CTS
delay, carrier control operation and "echo" enable/disable. The summa-
ry table below shows the factory default settings for switch S3.
Following the summary table is a detailed description of each individual
switch.
SWITCH S3 SUMMARY TABLE (factory defaults in bold)
Position Function
S3-1 RX Impedance
S3-2 RTS/CTS Delay
S3-3 Carrier Control
S3-4 Echo Mode
ON Position OFF Position
120 Ohm 16K Ohm
8 msec No Delay
RTS Controlled Constantly On
Echo ON Echo OFF
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