HISTORY OF ITU PORTAL – DOCUMENTS & DYNAMIC WEB PAGES
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Blue Book: Volume VI - Fascicle VI.4: Specifications of Signalling Systems R1 and R2; Recommendations Q.310-Q.490 Handle ID: 11.1004/020.1000/4.260.43.zh.5028 |
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Blue Book: Volume VI - Fascicle VI.5: Digital Local Transit, Combined and International Exchanges in Integrated Digital Networks and Mixed Analogue-Digital Networks; Supplements; Recommendations Q.500-Q.554 Handle ID: 11.1004/020.1000/4.260.43.zh.5029 |
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Blue Book: Volume VI - Fascicle VI.6: Interworking of Signalling Systems; Recommendations Q.601-Q.699 Handle ID: 11.1004/020.1000/4.260.43.zh.5030 |
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Blue Book: Volume VI - Fascicle VI.7: Specifications of Signalling System No. 7; Recommendations Q.700-Q.716 Handle ID: 11.1004/020.1000/4.260.43.zh.5031 |
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Blue Book: Volume VI - Fascicle VI.8: Specifications of Signalling System No. 7; Recommendations Q.721-Q.766 Handle ID: 11.1004/020.1000/4.260.43.zh.5032 |
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Blue Book: Volume VI - Fascicle VI.9: Specifications of Signalling System No. 7; Recommendations Q.771-Q.795 Handle ID: 11.1004/020.1000/4.260.43.zh.5033 |
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Blue Book: Volume VI - Fascicle VI.10: Digital Subscriber Signalling System No. 1 (DSS 1), Data Link Layer; Recommendations Q.920-Q.921 Handle ID: 11.1004/020.1000/4.260.43.zh.5034 |
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Blue Book: Volume IV - Fascicle IV.2: Maintenance of International Telegraph, Phototelegraph and Leased Circuits; Maintenance of the International Public Telephone Network; Maintenance of Maritime Satellite and Data Transmission Systems; Recommendations M.800-M.1375 Handle ID: 11.1004/020.1000/4.260.43.zh.5021 |
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Blue Book: Volume IV - Fascicle IV.3: Maintenance of International Sound-Programme and Television Transmission Circuits; Series N Recommendations Handle ID: 11.1004/020.1000/4.260.43.zh.5022 |
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Blue Book: Volume IV - Fascicle IV.4: Specifications for Measuring Equipment; Series O Recommendations Handle ID: 11.1004/020.1000/4.260.43.zh.5023 |
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