multifrequency pulsing (MF)

An inband interoffice address signal method in which ten decimal digits and five auxiliary signals are each represented by selecting two frequencies out of the following group: 700,900,1300,1500,and 1700Hz。; 一種帶內局間地址信號表示方法,此方法中所用的10個十進制數字和5個輔助信號中的每 一個都由700,900,1300,1500和1700赫茲這一組頻率中選出的兩個頻率來表示。