Updated 2012.12.07
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These are the 2+2 paging tones used by Motorola primarily for fire station alerting for decades from the 1950s and still in use today on analog radio systems.
Pay no attention to those awful G.E. tones, nobody really uses them anyway. :- )
| A Series | B Series | Z Series | GE A Series | GE B Series | GE C Series | ||||
|---|---|---|---|---|---|---|---|---|---|
| Tone No. | Reed | Freq | Reed | Freq | Reed | Freq | Freq | Freq | Freq |
| C | CA | 358.9 | CB | 371.5 | CZ | 346.7 | 682.5 | 652.5 | 667.5 |
| D | DA | 398.1 | DB | 412.1 | DZ | 384.6 | 592.5 | 607.5 | 712.5 |
| E | EA | 441.6 | EB | 457.1 | EZ | 426.6 | 757.5 | 787.5 | 772.5 |
| F | FA | 489.8 | FB | 507.0 | FZ | 473.2 | 802.5 | 832.5 | 817.5 |
| G | GA | 543.3 | GB | 562.3 | GZ | 524.8 | 847.5 | 877.5 | 862.5 |
| H | HA | 602.7 | HB | 623.7 | HZ | 582.1 | 892.5 | 922.5 | 907.5 |
| J | JA | 668.3 | JB | 691.8 | JZ | 645.7 | 937.5 | 967.5 | 952.5 |
| K | KA | 741.3 | KB | 767.4 | KZ | 716.7 | 547.5 | 517.5 | 532.5 |
| L | LA | 822.2 | LB | 851.1 | LZ | 794.3 | 727.5 | 562.5 | 577.5 |
| M | MA | 912.0 | MB | 944.1 | MZ | 881.0 | 637.5 | 697.5 | 622.5 |
| N | NA | 1011.6 | NB | 1047.1 | NZ | 977.2 | — | — | — |
| P | PA | 1122.1 | PB | 1161.4 | PZ | 1084.0 | — | — | — |
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