Sensaphone 1400 - Manual (Page 67)

Chapter 5: Communication Programming
65
Change to Touch-Tone Dialing
In a situation where you must use pulse dialing, pressing CODE 3
will change all following digits to Touch-Tone.
Special Dialing Code Summary
Special Dialing Codes for the 1400 are:
Code 1: Numeric pager type
Code 2: Wait for answer
Code 3: Change to Touch-Tone