Telegraphic a. : Of or pertaining to the telegraph; made or communicated by a telegraph; as, telegraphic signals; telegraphic art; telegraphic intelligence.

Example:
How to pay by Telegraphic transfer from POSB to OCBC bank?

Taxonomy
Telex, Western Union, telegram, telegraph, TWX, Wireless telegraphy, service, Internet, Telex service, Telex network, electrical telegraph, the Bell, wire, invention, London, company, Telex machine, Morse code.

Defination from the web:
telegraphic operation in a 1939 bid to monopolize U.S. telegraphy by ... International telegrams routed via FTCC were routed using the telegraphic routing ID "PQ", which are the initials of the founder of the company. ...