Green’s Dictionary of Slang

(Aus./N.Z.) the phone, the telephone.

1968		J. Alard He who Shoots Last 43: He’s here wif me waitin’ fer ya ta ring [...] I’ll put him on da Al Capone.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 17: Al Capone Phone.
1986		R.G. Barrett Real Thing 185: Just keep it tight on the Al Capone. Okay?
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Al Capone. Rhyming slang for telephone.
1999		N.Z. Words Oct. 2/3: There are many examples of rhyming slang in use at Paparua [Jail]: Al Capone, dog and bone, and eau de cologne for telephone.
2002		Convict Creations 🌐 Al Capone — Phone.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 6/2: Al Capone n. a telephone.
2016		N. Cummins Adventures of the Honey Badger [ebook] VITAL AUSSIE VERNACULAR Telephone: 1. Al Capone 2. Dog and Bone 3. Blower.