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Gain Control for Analog Voice Modules Overview

You can control the gain on analog voice modules in both the analog-to-digital and the digital-to-analog directions. The Rx direction corresponds to the analog-to-digital direction, and the Tx direction corresponds to the digital-to-analog direction. Table 1 shows the minimum and maximum gain for each direction and the granularity for the module.

Table 1: Ranges and Granularity of Gains for Analog Voice Modules


Minimum Rx Gain

Maximum Rx Gain

Minimum Tx Gain

Maximum Rx Gain



-7.1 dB

18.3 dB

-24.8 dB

0.6 dB

0.1 dB


-19.4 dB

6.0 dB

-9.1 dB

16.3 dB

.1 dB


-10.0 dB

15.0 dB

-13.0 dB

12.0 dB

1.0 dB

Modified: 2015-11-17