![]() ![]() The telco acted as carriers that sell of lease communication lines to facilitate communication over long distances using local exchanges and interexchange carriers. Traditional trunk calls operated like a circuit with local loops, trunk lines and switching offices. Trunk calls were generally more expensive than local calls, as they involved the use of long-distance communication lines. They were typically used for long-distance communication, as they allowed calls to be made between exchanges that were geographically far apart. ![]() Trunk calls were calls made over these trunk lines. Trunk lines were long-distance communication lines that connected telephone exchanges in different locations. In the past, telephone systems used trunk lines to connect different parts of the network.
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