Table1: AT commands (Continued)

Command

Function

 

 

X1

Same as X0 plus all CONNECT responses/blind dialing

 

 

X2

Same as X1 plus dial tone detection

 

 

X3

Same as X1 plus busy signal detection/blind dialing

 

 

X4

All responses and dial tone and busy signal detection

 

 

Z

Reset and recall user profile

 

 

B-8IBM Personal Computer User Guide

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IBM 2193, 6345, 2194 manual 8IBM Personal Computer User Guide