In the teletype case where all symbols are of the same duration, and any sequence of the 32 symbols
is allowed the answer is easy. Each symbol represents five bits of information. If the system transmits n
symbols per second it is natural to say that the channel has a capacity of 5n bits per second. This does not
mean that the teletype channel will always be transmitting information at this rate — this is the maximum
possible rate and whether or not the actual rate reaches this maximum depends on the source of information
which feeds the channel, as will appear later.