26Introduction to Keypad dialingIntroduction to Keypad dialingKeypad dialing can be used in both synchronous and asynchronous mode. TheMCA data parameter commands accessed through the Options Key, require aDisplay on the telephone. Keypad dialing commands are most useful for makingsimple data calls or for modifying the MCA configuration. The M3902, M3903,M3904, and M3905 access the MCA data parameters through the Option Key.• M3902 Option Key - one of the fixed key on the right side edge of telephone.• M3903 and M3904 Option Key - one of the fixed keys on the bottom edge ofthe telephone.• M3905 Option Key - is a Programmable Line/Feature Key (self-labeled)located on the right hand side of the upper portion of the telephone displayarea.Keypad dialingYou can use the telephone keypad for voice calls or to operate the MCA, by usingthe Options Key.General instruction for using Keypaddialing:/ 1. Pressing the Options Key.2. Use the up and down Navigation Keysto scroll to MCA data parameters.3. Press the Select Key.4. Use the right and left Navigation Keysto scroll through the MCA dataparameters sublist.5. Dial the two digits listed for your dataselection.OptionsMCA data parametersSelect