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14 Introduction
Terminal to Modem (DCE) or Host
Refer to the diagram below to understand why a null modem
adapter may be needed when connecting the second serial port
(SES2-AUX) to a modem or a DCE host. The first serial port will
connect directly without a null modem since it is a DTE device.
DTE
SES1 EIA
Modem
Transmit
Receive
DTR
DSR
Transmit
Receive
DTR
DSR
pin2
pin3
pin20
pin6
pin2
pin3
pin20
pin6
D
C
E
Host
DCE
SES2 AUX
Modem
D
C
E
Host
Receive
Transmit
DTR
DSR
Transmit
Receive
DTR
DSR
pin2
pin3
pin20
pin6
pin2
pin3
pin20
pin6
Terminal to Host (DTE) or Printer
Refer to the diagram below to understand why a null modem
adapter may be needed when connecting the first serial port
(SES1-EIA) to a host port without a modem (most serial printers
are DTE devices and most hosts are not). The second port (AUX)
will connect directly, without a null modem, since it is a DCE
device.
DCE
SES2 AUX
Receive
Transmit
DTR
DSR
Transmit
Receive
DTR
DSR
pin2
pin3
pin20
pin6
pin2
pin3
pin20
pin6
D
T
E
Host
DTE
SES1 EIA
D
T
E
Host
Transmit
Receive
DTR
DSR
Transmit
Receive
DTR
DSR
pin2
pin3
pin20
pin6
pin2
pin3
pin20
pin6
Serial
Printer
Serial
Printer
Summary of Contents for 4000/160
Page 1: ...4000 160 User s Guide...
Page 3: ...How to Connect Disconnect the Terminal iii All rights reserved Printed in USA...
Page 4: ......
Page 6: ......
Page 38: ...Screen Display and Pages 19 This page is intentionally left blank...
Page 53: ...Setup Map 29 Return Key Repeat F1 to F5 keys Disconnect and key and key UDKs...
Page 66: ...42 Setup loaded for each code page refer to the 260xx Programmer s Reference Guide...
Page 99: ...Diagnostic Menu 63 T his page is in ten tio nally left blank Note...
Page 106: ......