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BS 6353:1983
Specification for underground loudspeaker communication systems in coal mines
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Summary
Communication networks;Circuits;Voltage;Loudspeakers;Coal mining;Electrical safety;Output impedance;Safety devices;Mines;Telephone systems;Network parameters;Signal level;Mining equipment;Input impedance;Overvoltage protection;Audio systems;Overcurrent protection;Underground;Audio equipment;Electrical protection equipment;Speech transmission systems;Communication cables;Electric cables;Communication equipment;Acoustic couplers
Technical characteristics
| Publisher | British Standards Institution (BSI) |
| Publication Date | 04/29/1983 |
| Page Count | 12 |
| Themes | Acoustic couplers |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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29/04/1983
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