Controls the reference sensitivity for each trunk. You can control the reference sensitivity within the range of -10~+20 dB.
An analog trunk card must be mounted.
1) Select 5.Features => 5.4 Volume Control => 5.4.4 Trunk TMC Gain from the Tree Viewer.
2) View the current trunk TMC gains.
3) Change the TX and RX gains.
4) Save the changes.