英语词汇“cost control callback”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	cost control callback
释义	cost control callback cost control callback (communications)A system where a computer automaticallyrejects incoming dial-up calls from certain telephonenumbers and calls them back, with the result that the callerpays nothing for the connection. This differs from securitycallback in that it applies to certain phone numbers insteadof to certain user names.
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