1. A system for voice communication, the system comprising: a power supply assembly; at least one handset, each handset of the at least one handset being configured to transmit voice signals; a voice cable assembly communicably coupled with the power supply assembly and the at least one handset, the voice cable assembly comprising, a cable harness configured to receive a predetermined power from the power supply assembly, the cable harness further configured to receive the voice signals from the each handset of the at least one handset, and a voice cable circuit card assembly communicably coupled with the cable harness to receive the predetermined power from the cable harness for activation and to receive the voice signals from the cable harness, the voice cable circuit card assembly further configured to adapt the voice signals by utilizing the predetermined power in order to match a predefined voice requirement during the voice communication; and a main terminal communicably coupled with the voice cable assembly for receiving the adapted voice signals from the voice cable assembly, the main terminal further communicably coupled with the power supply assembly through the cable harness to receive the predetermined power from the power supply assembly, the main terminal being configured to transmit one or more output voice signals in response to the adapted voice signals to the voice cable assembly for transmission to the each handset of the at least one handset.