Phone functions, Security, Dial methods – Patton electronic SL4050/B2/E User Manual

Page 74: Voice quality

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Phone functions, Security, Dial methods | Voice quality | Patton electronic SL4050/B2/E User Manual | Page 74 / 79 Phone functions, Security, Dial methods | Voice quality | Patton electronic SL4050/B2/E User Manual | Page 74 / 79
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