If the printer is being used in a business or office, it may be connected to a Private Branch Exchange (PBX) telephone system. Ordinarily, when dialing a fax number, the printer waits to recognize the dial tone and then dials the fax number. However, this method of dialing may not work if the PBX telephone system uses a dial tone that is not recognizable to most fax machines. The “Dialing while behind a PBX” feature enables the printer to dial the fax number without waiting to recognize the dial tone.
From the desktop, double-click the Productivity Studio icon.
From the Settings area of the Welcome Screen, click Fax History and Settings.
From the “I Want To” menu, click Adjust speed dial list and other fax settings.
Click the Dialing and Sending tab.
From the “Dialing on your phone line” area, select Behind PBX from the Dialing Method drop-down list.
Click OK to save the setting.