(The large picture changes on "mouse over" the number of the phone or the circuit diagram).
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| System overview: | Schema | ||||||||
| 1925 Catalog number: | 5873 | 5874 | 5881 | 5882 | 5883 | 5884 | 5885 | 5886 | 5887 |
| Circuit number: | AS-242 | AS-242 | AS-244 | AS-244 | AS-243 | AS-245 | AS-243 | ||
| 1925 Catalog number: | 5888 | 5889 | |||||||
| Circuit number: | AS-245 | AS-245 | |||||||
| 1928 Catalog number: | 5881 | 5882 | 5883 | 5884 | |||||
| Circuit number: | AS-242/4 | AS-242/4 | AS-242/4 | AS-242/4 | |||||
| System overview: | Schema | ||||||||
| 1932 Catalog number: | 7854/55 | 7854-57 | |||||||
| Circuit number: |