MODEL RELEASED. Circuitry at telephone exchange. Clusters of telephone wires between circuit boards at a telephone exchange. Most modern exchanges use solid-state devices to carry out the switching process,with computers to control the operation | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Greim, John |
Bildgröße: | 3665 px × 2516 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |