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U.S. Robotics I-modem Command Reference

Analog Synchronous Applications • Page 16-8

Note Due to the nature of synchronous dial-up, the I-modem auto-answers only

on the third or fourth ring.

6. Set the I-modem to enter clear-channel synchronous mode.

Example: AT*V2=4&W <Enter>

Alternatively, you can combine all the previous commands into a compound command,

like this:

AT&M7&N10%N10X1S0=1*V2=4&W <Enter>

This tells the I-modem to use the HDLC protocol

for dialing, an ofßine clock speed and

connection rate of 19200 bps, display extended result codes, auto-answer incoming

calls, enter clear-channel synchronous mode, and write these settings to NVRAM

7. Set DIP switch

1 ON and then power the I-modem OFF, and then ON. Setting DIP

switch 1 ON causes the I-modem to read the settings you just made from NVRAM,

enabling synchronous operation.

Dialing Using V.25bis

Your communications software, which must support V.25bis, handles the dialing. Once the

synchronous connection is made and the I-modem is in synchronous mode, V.25bis

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US Robotics COURIER Manual de usuario Pagina 193