Busy tone, Ring back tone, Off hook warning – Patton electronic SL4020 User Manual

Page 69: Distinctive ring setting 1-8, Distinctive ring setting 1–8, Figure 43

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Busy tone, Ring back tone, Off hook warning | Distinctive ring setting 1-8, Distinctive ring setting 1–8, Figure 43 | Patton electronic SL4020 User Manual | Page 69 / 97 Busy tone, Ring back tone, Off hook warning | Distinctive ring setting 1-8, Distinctive ring setting 1–8, Figure 43 | Patton electronic SL4020 User Manual | Page 69 / 97
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