DTMF Algorithm Variant

Parameter group

Trunk Interface

Access level


Possible values

Normal Mode
DTMF Algorithm Variant 1


Normal Mode


This parameter controls which algorithm is used for DTMF detection. DTMF Algorithm Variant 1 is a slight change to the Normal DTMF detection algorithms used on the DTTA to reduce spurious detection of DTMF in the presence of speech and music. However, using DTMF Algorithm Variant 1 may result in some previously detected DTMFs that were close to the edge of the specification for DTMFs being rejected.