In wholesale SIP trunking, that highway is the Internet

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In traditional telecommunications terminology, you can think of a trunk line as an interstate highway for the telephone service.

On the road network, drivers navigate the smaller local roads from their homes to the highway; once on the highway, they can travel at high speeds without having to stop at every place along the way until they reach their destination. As they get closer to their destinations, they’ll have to leave the highway at the closest turn-off and return to the local roads to get where they need to go.

On telephone networks, israel telegram trunk lines work the same way as highways in the road network. Smaller telephone wires lead into a heavy-duty cable in the same way that local roads connect to multi-lane highways.
—a much cheaper medium than the telephone network. Wholesale SIP trunking service providers make this long-distance service available to most people and businesses worldwide, offering businesses a number of benefits in the process.

Simplified Connections
Organizing a data connection for voice traffic used to be complicated between the ISDN lines, basic rate interfaces, primary rate interfaces, and PSTN gateways to organize. Wholesale SIP trunking does away with all of these elements, simplifying the process of connecting and reducing costs in turn. Multi-site businesses can use a single SIP trunk connection to serve all locations without the need for multiple connections.

Thanks to wholesale SIP trunking, separate connections for voice and data traffic are no longer necessary. It has also become much easier to scale up these systems as businesses expand, minimizing the need to install additional lines or equipment.

For individual businesses, adopting SIP effectively outsources the link to the PSTN through the internet service provider rather than having it directly linked to their PABX. With this strategy, calls are carried via the Internet to a point close to their destination before transferring to the local telephone network.

In this way, SIP trunking removes the need for a PABX in-house, further reducing costs and improving flexibility (though there will, of course, be some initial costs, including switching to an IP-PBX either in-house or in the cloud and supplying desktop access in the form of IP phones or softphones).