Telephone Exchange
A system that interconnects telephone subscriber lines, allowing any user to connect to any other, moving beyond simple point-to-point connections.
Core metadata
- ID: telephone_exchange
- Era: Industrial
- First known date: 1878 (exact)
- Region: United States
- Review status: source_checked
- Maturity: established
Prerequisites
Dependents
- Automatic Telephone Switching (automatic_telephone_switching)
- Cellular Networks (cellular_networks)
- Digital Subscriber Line (digital_subscriber_line_dsl)
- Telephone Directory Services (telephone_directory_services)
- Telephone Switchboards (telephone_switchboards)
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: 2
- Average edge confidence: 72%
- Prerequisite sources: 2
- expert_inference: 2
| Prerequisite | Type | Confidence | Evidence level | Note | Sources |
|---|---|---|---|---|---|
| Telephone (telephone) | enabling | 68% | expert_inference | Telephone provides a capability that enables this technology without being the only possible path. |
|
| Record Keeping (record_keeping) | historical_predecessor | 75% | expert_inference | Record Keeping is an earlier historical predecessor or foundation, not a one-to-one engineering dependency. |
|
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