User Manual

Ambit Microsystems Corporation國碁電子(股)公司
5F-1, 5 Hsin-An Rd., Hsinchu Science-Based Industrial Park, Hsinchu, Taiwan, R.O.C.
TEL: [phone], FAX: [phone], Internet: http:\\www.ambit.com.tw\
中華民國臺灣省新竹縣新竹科學園區新安路5號5樓之1
電話886-3-5784975，傳真：886-3-5782924
3.2 AT Commands
Basic AT Commands
A summary of the commands implemented by the modem are shown in Table1. Commands may be executed
when the modem is in COMMAND mode. COMMAND mode is entered upon one of the following conditions:
After power up.
At the termination of a connection.
After the execution of a command other than dial or answer commands (ATO or AT&T).
Upon the receipt of the ESCAPE SEQUENCE (three consecutive characters matching the contents of S register 2)
while online mode.
Upon the on-to-off transition of DTR if D1, &D2, or &D3 has been set.
AT Commands
Basic AT Commands
Command Function Command Function
A/ Re-execute command A Go off-hook and attempt to answer a call
B0 Select V.22 connect @1200 bps B1 Select Bell 212A connect @1200 bps
C1 Return OK message Dn Dial modifier