Telephomnemonics, a portmaneau or blend word coined by Dave Silverman in his August 1970 Kickshaws column, can be defined as the choice of letters on the telephone dial to form a word or phrase, as an aid for remembering seven-digit telephone numbers.
Eckler, A. Ross
Word Ways: Vol. 14
, Article 17.
Available at: http://digitalcommons.butler.edu/wordways/vol14/iss2/17