Shìdiào gōngsī jīntiān diànfǎng le yī qiān míng xiāofèizhě.
The market research firm phone-surveyed a thousand consumers today.
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Mainly Taiwan usage. Abbreviation of 电话访问 (diànhuà fǎngwèn, 'telephone visit / interview'). On the Mainland you'll more often hear 电话回访 (diànhuà huífǎng) for follow-up calls or 电话调查 (diànhuà diàochá) for phone surveys.