File:PSTN office classification hierarchy.svg
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:08, 18 August 2007 | 720 × 720 (31 KB) | Mysid | minor | |
| 10:05, 18 August 2007 | 720 × 720 (31 KB) | Mysid | {{Information |Description=U.S. w:PSTN telephone switch hierarchy. |Source=Self-made in Inkscape, based on a diagram in enwp (en:Image:PSTN office classification hierarchy.png). |Date=August 18, 2007 |Author= Mysid }} [[Category:P |
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