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
Module | Minimum Rx Gain | Maximum Rx Gain | Minimum Tx Gain | Maximum Rx Gain | Granularity |
---|---|---|---|---|---|
4WE&M | -7.1 dB | 18.3 dB | -24.8 dB | 0.6 dB | 0.1 dB |
2W-FXS | -19.4 dB | 6.0 dB | -9.1 dB | 16.3 dB | .1 dB |
2W-FXO | -10.0 dB | 15.0 dB | -13.0 dB | 12.0 dB | 1.0 dB |