Simple past tense and past participle of dial.(verb)
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Use "dialled" in a sentence
"What's more, the captive portal screen (where all this is explained) lists all the places you can buy a scratch-off card in a downloadable, enormous PDF file, rather than on a web-page, and has a tech-support 800 number that can't be dialled from the payphones in the airport (which disallow toll-free calls)."
"It's simple: International calls dialled on a Truphone Anywhere enabled handset are connected as local calls to the Truphone network, then routed to their destinations at Truphone's low rates."
"International calls dialled on a Truphone Anywhere enabled handset are connected as local calls to the Truphone network, then routed to their destinations at Truphone's low rates."