Trunk call and Toll-free call

Trunk call noun - A telephone call made outside the local calling area.

Toll-free call and trunk call are semantically related in telephone communication topic. In some cases you can use "Toll-free call" instead a noun phrase "Trunk call", when it comes to topics like conversation using telephone.

Trunk call and toll-free call are semantically related in telephone communication topic. You can use "Trunk call" instead a noun phrase "Toll-free call", if it concerns topics such as conversation using telephone.