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SDM-300A Satellite Modem
A.1.4.5.2
Configuration #2 (Local EIA-232 to Remote EIA-485 [4-Wire])
ASYNC TX and RX Type
ASYNC TX and RX Baud Rate
ASYNC TX and RX Length
ASYNC TX and RX Parity
ASYNC TX Stop
ASYNC TX and RX Type
ASYNC TX and RX Baud Rate
ASYNC TX and RX Length
ASYNC TX and RX Parity
ASYNC TX Stop
Remote Baud Rate
Parity
Address
The local end cable connects the 25-pin female ASYNC connector (on either the
breakout panel or the Y cable) to the EIA-232 (4-wire) remote terminal (WYSE or laptop
computer). The pinout of the local cable is listed in the following table.
The remote end cable connects the 25-pin female ASYNC connector (on either the
breakout panel or the Y cable) to the 9-pin female connector, J6, at the rear of the
modem. The pinout of the remote cable is listed in the following table.
Rev. 4
Table A-6. Local EIA-232 to Remote EIA-485 (4-Wire)
#2. Local End Modem Settings for EIA-232 (4-Wire)
Utility Interface Menu
Configuration Interface Menu
#2. Remote End Modem Settings for EIA-485 (4-Wire)
Utility Interface Menu
Configuration Interface Menu
Utility System Menu
#2. Local End EIA-232
9-Pin
Female Connector
RX
TX
GND
#2. Remote End EIA-485 (4-Wire)
9-Pin
Male Connector
TX+
TX-
RX+
RX-
EIA-232
150 to 38400
7 bits
Even
2 bits
EIA-485 (4-wire)
150 to 38400
7 bits
Even
2 bits
Equal to ASYNC TX and RX baud rate
Even
1 to 255
25-Pin
Male Connector
2
3
TX
3
2
RX
5
7
GND
Twisted Pair
25-Pin
Male Connector
4
16
RX+
5
3
RX-
8
14
TX+
9
2
TX-
(See A.1.4.3.10)
(See A.1.4.3.10)
Options
A–31
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