Trunking
In telecommunication, the term trunk has the following meanings:
1. In a communications network, a single transmission channel between two points that are switching centers or nodes, or both.
2. [A] circuit between switchboards or other switching equipment, as distinguished from circuits which extend between central office switching equipment and information origination/termination equipment.
Note: Trunks may be used to interconnect switches, such as major, minor, public and private switches, to form networks.
Source: from Federal Standard 1037C and from MIL-STD-188 and from the Code of Federal Regulations, Telecommunications Parts 0-199
