ADSL defines three "Transmission protocol-specific transmission convergence (TPS-TC)" layers:
- Synchronous Transport Module (STM), which allows the transmission of frames of the Synchronous Digital Hierarchy (SDH)
- Asynchronous Transfer Mode (ATM)
- Packet Transfer Mode (starting with ADSL2, see below)
In home installation, the prevalent transport protocol is ATM. On top of ATM, there are multiple possibilities of additional layers of protocols (two of them are abbreviated in a simplified manner as "PPPoA" or "PPPoE"), with the all-important TCP/IP at layer 4 of the OSI model providing the connection to the Internet.
Read more about this topic: Asymmetric Digital Subscriber Line
Other articles related to "transport protocols, transport protocol":
... may have one or more data sinks depending upon the Transport Protocol used in the channel ... SLIMbus supports a small group of frequently used Transport Protocols (including a User Defined Transport Protocol) which define data flow type, flow control ... A summary of the Transport Protocols is shown in Table 1 ...
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