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DIN ETS 300439:1997-11
Business TeleCommunications (BTC) - Transmission characteristics of digital Private Branch eXchanges (PBXs); English version ETS 300439:1996
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Technical characteristics
| Publisher | Deutsche Institut für Normung e.V. (DIN) |
| Publication Date | 11/01/1997 |
| Page Count | 8 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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