| 单词 | Table Q-1: Selected ITU-T Q-Series Recommendations |
| 释义 | Table Q-1: Selected ITU-T Q-Series Recommendations Recommendation Description Q.20 Comparative advantages of in-band and out-of-band signaling systems Q.21 Systems recommended for out-band signaling Q.22 Frequencies to be used for in-band signaling Q.23 Technical features of push-button telephone sets Q.71 ISDN circuit mode switched bearer services Q.700 Introduction to CCITT Signaling System No. 7 (SS7) Q.716 SS7 - Signaling connection control part (SCCP) performance Q.721 Functional description of SS7Telephone User Part (TUP) Q.824.1 ISDN basic and primary rate access Q.824.2 ISDN supplementary services Q.824.3 ISDN optional user facilities Q.824.4 ISDN teleservices Q.921 ISDN user-network interface - Data link layer specification Q.931 ISDN user-network interface layer 3 specification for basic call control Q.2763 SS7 B-ISDN User Part (B-ISUP) - Formats and codes Q.2764 SS7 B-ISDN User Part (B-ISUP) - Basic call procedures |
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