Inter-Machine Trunk. A circuit connecting two automatic switching centers; generally excludes signaling information when coupled with SS7 network-based signaling.
Inter-Machine Trunk. These are switch-to-switch trunks that are used to carry calls between carriers. Signaling is not performed in-band on these trunks; instead, they are coordinated via the overlaid SS7 network.
Internet Media Type. A set of terms that describe types of resources on the Internet. Used as an encoding scheme for the Format element in Dublin Core. http://isi.edu/in-notes/iana/assignments/media-types/media-types