Table of Contents
0.
Introduction....................................................................................................................................................................67
1.
1.1
ISDN ........................................................................................................................................................................68
1.1.1
Setting up a connection ..............................................................................................................................68
1.2
1.3
Internet Access......................................................................................................................................................69
1.3.1
Remote LAN Access ...................................................................................................................................69
1.4
2.
2.1
2.1.1
2.2
What else do you need ........................................................................................................................................72
2.3
2.4
Protocols.................................................................................................................................................................72
2.5
Establishing a data connection..........................................................................................................................74
3.
AT command set and S registers.............................................................................................................................76
3.1
The AT command set...........................................................................................................................................76
3.1.1
Command mode and data mode .............................................................................................................76
3.1.2
Building a command line ...........................................................................................................................77
3.2
S Registers ............................................................................................................................................................77
3.2.1
Bitmapped S regis ters ................................................................................................................................77
3.3
3.4
General settings....................................................................................................................................................78
3.5
Dialing and Answering.........................................................................................................................................79
3.5.1
Dialing an ISDN num ber ............................................................................................................................79
3.6
Serial port settings................................................................................................................................................80
3.6.1
Result codes .................................................................................................................................................82
3.6.2
Other messages ..........................................................................................................................................83
3.7
Profiles and identification ....................................................................................................................................83
3.8
Other commands ..................................................................................................................................................84
4.
Sundries..........................................................................................................................................................................85
4.1
Settings (profiles)..................................................................................................................................................85
4.2
Nonvolatile memory settings ..............................................................................................................................85
5.
Special applications.....................................................................................................................................................86
5.1
Dial-in configuration .............................................................................................................................................86
5.1.1
Subaddresses ..............................................................................................................................................86
5.1.2
MSN numbers...............................................................................................................................................87
5.1.3
Setting protocol priorities............................................................................................................................88
5.1.4
Remote Configuration.................................................................................................................................88
Appendix B: RS232C Connector.........................................................................................................................................90
Appendix C: Call Clearing Causes .....................................................................................................................................91
66