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4.20.26. PrmGainCtrl (Gain Control)
Description: The PrmGainCtrl parameter is used in conjunction with the PrmVolCtrl parameter to govern the overall signal power level of the decoded PCM data before it is transmitted to the SCbus in the direction of the PSTN interface.
The PrmGainCtrl parameter is a gain factor by which the signal is amplified, and can be any value between 1 and 8 inclusive. A PrmGainCtrl 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 PrmGainCtrl setting and the PrmVolCtrl attenuation setting, together determine the overall amplification of the signal.
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