What is 300-100 Twister Wire ?

In the following term Twisted Wire  300bps-10Mbps. what is mean of this?
What is g`(t)

Twisted Pair Cable is a communication medium through which data can be transferred from computer to another. Here this means that this type of cable is capable of transferring data from 300 bits to 10 Mega bits in one second. This tells us the minimum and maximum capacity of this type of communication medium.

g`(t) has been used in the diagram as a short name to represent the output data. It is just a short name; you may use any other name to represent this data.