6-10 Netopia ISDN Modem User’s Guide
About autobaud
Autobaud automatically detects your computer’s serial port current data rate, up to 115.2 Kbps (autobaud does not support 230.4 Kbps transmissions).
To set the baud rate to the maximum speed of 230.4 Kbps, first make sure your computer’s serial port and your communications software support 230.4 Kbps transmission speed. Then send the following command to the Netopia ISDN Modem: AT $B 230400. Change the setting of your application program to 230400 bps. If you are using a Macintosh computer, start up the ISDN Setup application and set the baud rate to 230.4 Kbps. (For more information, see the “Configuration using a Macintosh computer” section on page
If you are using the Windows configuration program, autobaud must be enabled to access the Netopia ISDN Modem configuration dialog box. If the baud rate is set to a specific rate (such as 230.4 Kbps), you will not be able to access the configuration dialog box.
Before you set the ISDN modem to a specific baud rate, make sure the configuration dialog box parameters are set correctly. To return to autobaud mode, set the baud rate of your communications program to the baud rate you defined for the ISDN modem and then send the following AT command: AT$B0. This sets the ISDN modem to autobaud. If you are still unable to access the configuration dialog box, press and hold down the “a” key on the keyboard and press the RESET key on the back of the ISDN modem. Hold the “a” key down until the ISDN modem comes back on line and then release the key.
