From Longman Dictionary of Contemporary Englishon the bloweron the blowerTCT British English old-fashioned on the telephone in order to talk to someone → blower
Examples from the Corpus
on the blower• Or has rapper Puff been on the blower from New York with a few choice words?• It was just me at home on the blower, learning about all the various bits of it.• Wyatt turned on the blower and the image disappeared. 