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or FIFOs are modeled as channels, and are presented to modules using [[SystemC]] interface classes. Transaction requests take place by calling interface functions of these channel models, which encapsulate low-level details of the information exchange. At the transaction level, the emphasis is more on the functionality of the data transfers - what data are transferred to and from what locations - and less on their actual implementation, that is, on the actual protocol used for data transfer. This approach makes it easier for the system-level designer to experiment, for example, with different bus architectures (all supporting a common abstract interface) without having to recode models that interact with any of the buses, provided these models interact with the bus though the common interface. (Quoted with permission from [1]).
==History==
Roots of the term '''TLM''', or "'''Where is the Level in TLM?'''":
TLM was supposed to come out as TBM (= transaction-based modeling).
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