![background image](http://html1.mh-extra.com/html/3com/3comimpact-iq/3comimpact-iq_user-manual_440899134.webp)
C-2
A
PPENDIX
C: S
PECIFICATIONS
RS-232 COM Port Pin Specifications
The asynchronous RS-232-D COM port on the 3C882 ISDN
modem, labeled RS-232, is a standard DB-25 female
connector. The 3C882 ISDN modem asynchronous port pin
assignments, shown in Table C-1, conform to standard
definitions for data communications equipment (DCE).
Table C-1
Pin Descriptions
Pin #
Pin Name
Signal Direction
1
Shield Ground (GND)
—
2
Send Data (SD)
To ISDN modem
3
Receive Data (RD)
From ISDN modem
4
Request to Send (RTS)
To ISDN modem
5
Clear to Send (CTS)
From ISDN modem
6
Data Set Ready (DSR)
From ISDN modem
7
Signal Ground (GND)
—
8
Carrier Detect (DCD)
From ISDN modem
18
Local Loopback
From ISDN modem
20
Data Terminal Ready
(DTR)
To ISDN modem
21
Remote Loopback
To ISDN modem
22
Ring Indicator (RI)
From ISDN modem
Summary of Contents for 3COMIMPACT IQ
Page 1: ... 3COMIMPACT IQ EXTERNAL ISDN MODEM USER GUIDE Part No 09 0885 001 Published July 1997 ...
Page 4: ......
Page 12: ......
Page 64: ...3 34 CHAPTER 3 CONFIGURATION FOR AN IBM COMPATIBLE PC RUNNING WINDOWS ...
Page 90: ...5 6 CHAPTER 5 ADVANCED CONFIGURATION ...
Page 132: ...B 10 APPENDIX B AT COMMANDS S REGISTERS AND RESULT CODES ...
Page 136: ...C 4 APPENDIX C SPECIFICATIONS ...
Page 140: ...D 4 APPENDIX D CONFIGURATION USING DOS ...
Page 146: ...6 GLOSSARY ...
Page 153: ...Windows NT 3 5 1 3 17 Windows NT 4 0 3 20 ...
Page 154: ......