2-2 C HAPTER 2: U SING THE AT COMMAND S ETAT&K3X2DT5551234Hyphens and parentheses add to the count of 56 characters but spacesdo not.Basic AT commands The command AT informs the modem that a command is coming. ATmust precede all commands except A/, A> and +++.Example: Sending ATD5551234 will make the modem dial 555 1234.Now, if you send A/ the modem will dial 555 1234 again.Using S-Registers S-Registers are addresses of places in memory where various timinparameters, redefinitions of selected ASCII characters, and otherconfiguration settings are stored.Initially, the S-Register settings for each of the NVRAM templates are thesame. You can overwrite an S-Register’s stored value. See the defaultvalues listed in Appendix A, S-Registers, for a complete listing of theinitial settings.AT Attention; a command follows.&K3 Disable MNP5 data compression; use only V.42 bis compression.X2 Use the X2 result code subset.DT Dial the following number using tone dialing.To configure your modem to CommandRe-execute the last-issued command. A/Repeat the last-issued command until canceled by pressingany key.A>
