Signaling System No. 5 (Q7512768)
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multi-frequency telephone signaling system
- SS5
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Signaling System No. 5 |
multi-frequency telephone signaling system |
|
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Sitelinks
Wikipedia(2 entries)
- enwiki Signaling System No. 5
- eswiki Sistema de señalización No. 5