Checking the ringer type, Adjusting the ringer volume, Level of the base phone – Sony SPP-A947 Manuel d'utilisation

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Checking the ringer type, Adjusting the ringer volume, Level of the base phone | Sony SPP-A947 Manuel d'utilisation | Page 22 / 104 Checking the ringer type, Adjusting the ringer volume, Level of the base phone | Sony SPP-A947 Manuel d'utilisation | Page 22 / 104
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