How did landline phones work during power cuts?
Unlike today’s smartphones, traditional landline phones did not depend on the electricity coming into your house. Instead, they drew power through the same copper wires that carried your voice. These wires were connected to a telephone exchange, a central hub that linked thousands of telephones together.The exchange constantly supplied a small amount of direct current (DC) electricity, usually around 48 volts, through the telephone lines.
- ▪Unlike today’s smartphones, traditional landline phones did not depend on the electricity coming into your house.
- ▪Instead, they drew power through the same copper wires that carried your voice.
- ▪These wires were connected to a telephone exchange, a central hub that linked thousands of telephones together.The exchange constantly supplied a small amount of direct current (DC) electricity, usually around 48 volts, through the telephon
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| Original publisher | The Hindu |
| Canonical URL | https://www.thehindu.com/children/how-did-landline-phones-work-during-power-cuts/article71220372.ece |
| Publication time | Mon, 27 Jul 2026 14:42:18 +0530 |
| Retrieval time | 2026-07-27T09:26:11.564Z |
| Last seen | 2026-07-27T09:26:11.564Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | JC27vxb_OHVv · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
The secret lay far away from your home. Unlike today’s smartphones, traditional landline phones did not depend on the electricity coming into your house. Instead, they drew power through the same copper wires that carried your voice. These wires were connected to a telephone exchange, a central hub that linked thousands of telephones together.The exchange constantly supplied a small amount of direct current (DC) electricity, usually around 48 volts, through the telephone lines. A traditional landline phone needed very little power, just enough to carry your voice and ring when someone called.
…
Excerpt limited to ~120 words for fair-use compliance. The full article is at The Hindu.
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