ISDN Specifications » History » Version 2
laforge, 04/03/2022 08:35 PM
| 1 | 1 | laforge | h1. ISDN Specifications |
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| 3 | 2 | laforge | Unfortunately there are many dialects of ISDN. This was common-place in the old national PSTN networks even before ISDN, so it seemed "normal" at the time. |
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| 5 | h2. International / ITU-T (formerly known as CCITT) |
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| 7 | * "Q.921":https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-Q.921-199709-I!!PDF-E&type=items (LAPD) |
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| 8 | * "Q.931":https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-Q.931-199805-I!!PDF-E&type=items (Call Control) |
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| 10 | h2. Europe / ETSI |
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| 12 | Etsi specified what was later known as "Euro-ISDN". |
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| 14 | * "EN 300 403-1":https://www.etsi.org/deliver/etsi_en/300400_300499/30040301/01.03.02_60/en_30040301v010302p.pdf (DSS1 Part 1: Protocol Specification) |
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| 15 | * "EN 300 403-2":https://www.etsi.org/deliver/etsi_en/300400_300499/30040302/01.03.01_60/en_30040302v010301p.pdf (DSS1 Part 2: SDL Diagrams) |
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| 17 | h2. Germany |
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| 19 | In Germany, there was a national ISDN dialect called 1TR6, which was later obsoleted by Euro-ISDN. See [[German_FTZ_ISDN_Specifications]]. |
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| 21 | h2. Further wiki pages |
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| 23 | 1 | laforge | {{child_pages}} |
