| 单词 | UIFN (Universal International Freephone Number) |
| 释义 | UIFN (Universal International Freephone Number) A toll-free telephone number for interna- tional calling. A UIFN charges the cost of the call to the called party. Standardized by the ITU-T, the numbering convention for UIFNs is 800 + 8 digits. See also ITU-T and toll free service. |
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