The machine used to send a Cablegram was traditionally a telegraph, although in the latter half of the 20th century, Telex machines were used to send cablegrams, which are essentially, telegrams sent exclusively by means of land and sea cables, such as the infamous Atlantic Telegraph Line that connected Great Britain to it's the North American Commonwealth realms of the Canadian Federation & Newfoundland.
machine used to send cablegrams
A cablegram is a telegram transmitted via a submarine cable.
cablegram
telex, wire, telegraph, signal, radiogram, coded message, cablegram, buzzer, cable
A telegraph is a machine which is used for transmitting messages in the form of electrical impulses which can be converted into data. A message sent via telegraph is called a telegramor cablegram, while someone who operates a telegraph machine is known as a telegrapher.
They can be used to add up numbers, send spreadsheets, and to send messages
to send error messages to send control messages
teleGRAM GRAMmar panGRAM holoGRAM epiGRAM monoGRAM aeroGRAM cableGRAM GRAM centiGRAM deciGRAM diaGRAM electroGRAM kiloGRAM, megaGRAM, milliGRAM, pictoGRAM,
One used to be able to send a graduation announcement to the US President. It is unclear as to weather or not now the same thing still happens as it used to. It used to be that one would send an announcement and the president would send a congratulatory letter back.
SMTP (send mail transfer protocol)
the first method used to send messages by electricity.
There are many alphabet systems used to send messages throughout history. The most relevant and recent one would be known as Morse code. Any language's alphabet can be used to send messages as well.