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4.20.14. PrmDTMFGainCtrl (DTMF Gain Control)
Description: The PrmDTMFGainCtrl parameter is used in conjunction with the PrmDTMFVolCrtl parameter to govern the overall signal power level of the signals before they are transmitted to the SCbus in the direction of the PSTN interface.
The PrmDTMFGainCtrl parameter is a gain factor by which the signal is amplified, and can be any value between 1 and 8 inclusive. A Gain Control value of 1 results in no amplification. If the volume of the signal seems weak, increase this
value. If the volume seems too strong, decrease this value. It is recommended that this parameter be modified one integer at a time and the results evaluated.
The product of the PrmDTMFGainCtrl setting and the PrmDTMFVolCrtl attenuation setting, together determine the overall amplification of the DTMF signal.
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