Netgear XM128 QIG - Quick Install Guide - Page 143

Appendix F, Serial Port Interface

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Appendix F Serial Port Interface This appendix provides information about the serial port interface for the Model XM128 ISDN Digital Modem. RS-232 Serial Interface Table F-1 describes the RS-232 25-pin serial port interface for the Model XM128 modem. Table F-1. Pin number 1 2 3 4 5 6 7 8 15 17 18 20 21 Serial port interface ITU-TSS signal name 101 103 104 105 106 107 102 109 114 115 141 108/2108/1 140 EIA signal name AA BA BB CA CB CC AB CF DB DD CD Signal/pin description Protective ground (GND). Transmitted data (TXD). Received data (RXD). Request to send (RTS). Clear to send (CTS). Data set ready (DSR). Signal ground (GND). Data carrier detected (DCD). Transmit clock signal (source: DCE). Synchronous receive clock. Local analog loopback test. Data terminal ready (DTR). Connect DCE to line. Remote digital loop test. Signal direction DTE -DCE ? Serial Port Interface F-1

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Serial Port Interface
F-1
Appendix F
Serial Port Interface
This appendix provides information about the serial port interface for the Model XM128 ISDN
Digital Modem.
RS-232 Serial Interface
Table F-1
describes the RS-232 25-pin serial port interface for the Model XM128 modem.
Table F-1.
Serial port interface
Pin number
ITU-TSS
signal name
EIA
signal name
Signal/pin description
Signal direction
DTE -DCE
1
101
AA
Protective ground (GND).
¤
2
103
BA
Transmitted data (TXD).
?
3
104
BB
Received data (RXD).
‹
4
105
CA
Request to send (RTS).
?
5
106
CB
Clear to send (CTS).
‹
6
107
CC
Data set ready (DSR).
‹
7
102
AB
Signal ground (GND).
¤
8
109
CF
Data carrier detected (DCD).
‹
15
114
DB
Transmit clock signal (source: DCE).
‹
17
115
DD
Synchronous receive clock.
‹
18
141
Local analog loopback test.
?
20
108/2108/1
CD
Data terminal ready (DTR).
Connect DCE to line.
?
21
140
Remote digital loop test.
?