Trunking allows multiple calls to go through simultaneously, which is a must for many organizations. Although the same VoIP trunk connects all business users (both in-office and remote), the signals are sent over a single trunking link that allows each call to reach the correct destination.

Why are trunk lines used?

Trunk lines are used for connecting a private branch exchange (PBX) to a telephone service provider. When needed they can be used by any telephone connected to the PBX, while the station lines to the extensions serve only one station telephones. ... Trunking allows a group of inlet switches at the same time.

When would you use a trunk port?

The trunk port allows us to switch multiple VLANs, but all frames are in the same VLAN in the Access port. The trunk port basically used to connect between switches; however, the access port is used to connect computer laptops, printers, etc.