6
ISDN TA/V
Chapter
Page
13. Dialing, Answering, and Clearing Calls Using AT Commands.............61
13.1 Using the D Command ...................................................................61
13.2 Using the Number Directory..........................................................62
13.3 Clearing a Call .................................................................................63
13.4 Answering an Incoming Call ..........................................................64
13.5 ISDN TA/V Response Codes..........................................................64
13.5.1 Valid Response Codes ...........................................................65
14. DTE Interface Commands and S-Register Settings.............................68
14.1 Data Transmission Mode ................................................................68
14.2 DTE Electrical Characteristics Conformance................................69
14.3 Default Async Speed........................................................................70
14.4 Setting the Communications Format.............................................70
14.4.1 Number of Data Bits .............................................................70
14.4.2 Parity Bits ...............................................................................71
14.4.3 Number of Stop Bits..............................................................71
14.5 Communications Signaling Requirements....................................71
14.5.1 DTR Control ..........................................................................72
14.5.2 DSR Control ..........................................................................72
14.5.3 RTS Control...........................................................................73
14.5.4 CTS Control...........................................................................73
14.5.5 RTS/CTS Delay .....................................................................73
14.5.6 DCD Control..........................................................................74
15. User Commands ................................................................................75
15.1 Selecting AT or V.25bis Dialing Commands .................................75
15.2 AT Escape Sequence Character Key and Response Timeout.......75
15.3 Effect of the
BREAK
Key on a Terminal’s Keyboard ....................76
15.4 Command Character Echo.............................................................77
15.5 Defining the Command Terminator Key ......................................77
15.6 Defining the Backspace Character Key..........................................77
15.7 Defining the Line Feed Character Key ..........................................78
15.8 ISDN TA/V Response (Result) Codes and
Extended Response Codes........................................................78
15.9 V.25bis Command Mode Format ...................................................78
15.10 Responding to AT Commands .....................................................79
15.11 Audible Alert Control ...................................................................79
15.12 Reverting to Power-up Configuration Settings............................80
15.13 Unit Identification Commands ....................................................80
