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Appendix A. AT Commands
61202.029L2-1 ISU 128 User Manual 89
Command Function
Clear-To-Send (CTS) Control Line Options
&R0 Follows RTS
&R1 Forced CTS
Data Set Ready (DSR) Control Line Options
&S0 DSR forced On
&S1 DSR if call up
&S2 DSR Off if link down
&S3 DSR Off if Dial Up
DTE Connector Data Synchronous Data Clocking Options
&X0 Internal transmit clock
&X1 External transmit clock
Accessing Stored numbers for Dialing Options
&Z0 Stored number 0
&Z1 Stored number 1
&Z2 Stored number 2
&Z3 Stored number 3
&Z4 Stored number 4
&Z5 Stored number 5
&Z6 Stored number 6
&Z7 Stored number 7
&Z8 Stored number 8
&Z9 Stored number 9
Local Echo Options
E0 Echo off. Does not allow command characters typed to be displayed on
the screen.
E1 Echo on. Determines if the command characters typed are displayed on
the screen.
Unit Identification
I0 Identify unit. Commands the unit to display model number.
I1 Identify software. Commands the unit to display software version.
AT Command Response Message Options
Q0 Response messages on
Q1 Response messages off