| 单词 | 1B+D |
| 释义 | 1B+D Referring to a variation of the ITU-T specification for ISDN basic rate interface (BRI), also known as basic rate access (BRA). BRI supports two bearer (B) channels and one data (D) channel. 74570cintro.qxd 9/11/07 12:17 PM Page 3 |
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