Automatic Telephone Switching
Electromechanical switching systems that connected calls without manual switchboard operators.
Core metadata
- ID: automatic_telephone_switching
- Era: Industrial
- First known date: 1891 (exact)
- Region: United States
- Review status: source_checked
- Maturity: established
Prerequisites
- Electricity (electricity)
- Precision Machine Tools (precision_machine_tools)
- Telephone Exchange (telephone_exchange)
Dependents
- None.
Fields
Field lanes
- Telecommunications & Networking: Foundations & Switching
Node sources
- Telephone (Encyclopaedia Britannica, 2026, textbook) • Supports: node, maturity
Prerequisite edge evidence
Edge/source evidence summary:
- Prerequisite edges: 3
- Average edge confidence: 68%
- Prerequisite sources: 3
- expert_inference: 3
| Prerequisite | Type | Confidence | Evidence level | Note | Sources |
|---|---|---|---|---|---|
| Telephone Exchange (telephone_exchange) | enabling | 68% | expert_inference | Telephone Exchange provides a capability that enables this technology without being the only possible path. |
|
| Electricity (electricity) | enabling | 68% | expert_inference | Electricity provides a capability that enables this technology without being the only possible path. |
|
| Precision Machine Tools (precision_machine_tools) | enabling | 68% | expert_inference | Precision Machine Tools provides a capability that enables this technology without being the only possible path. |
|
This page is generated from canonical era JSON and is indexable by URL.