| 单词 | Table V-3: Selected ITU-T V-Series Recommendations |
| 释义 | Table V-3: Selected ITU-T V-Series Recommendations Recommendation Number Description V.17 14.4 kbps two-wire modems for facsimile transmission over dial-up PSTN circuits V.21 300 bps FDX modems for use over dial-up PSTN circuits V.22 1200 bps FDX modems for use over dial-up PSTN circuits and point-to-point two-wire leased lines 74570c22.qxd 9/12/07 12:48 AM Page 531 |
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