Class 4 telephone switch (Q5127906)
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telephone switch used to connect local telephone company offices for long distance calls within the United States
- tandem
- class-4
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Class 4 telephone switch |
telephone switch used to connect local telephone company offices for long distance calls within the United States |
|
Statements
Identifiers
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Wikipedia(1 entry)
- enwiki Class-4 telephone switch