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- Bearer services carry the call activity that the user is performing
at any given moment.
- This includes voice calls, fax and modem calls, and connections
to the Internet.
- Broadly speaking, there are two forms of bearer service.
- Structured Data - the information passing over the
bearer service is in a format that is understood by the
network.
Voice is an example of structured data. Because the network knows
that the connection carrying voice, it can convert the data into an analogue signal
in the event that the call is connected to an ordinary
analogue phone.
- Unstructured Data - the format of the information is not
understood by the network, but is understood by the two users at either
end of the service.
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