Final answer:
The Tactical Operations Center (TOC) provides voice communications access to operators through a switchboard.
Step-by-step explanation:
The Tactical Operations Center (TOC) serves as the central location for coordinating military operations. To ensure effective communication, the voice communications access is provided through a dedicated system called the switchboard. The switchboard connects the operators in the TOC with various communication devices, such as telephones or radios, allowing them to receive and transmit voice messages.