VTech VT6221 - Manual (Page 24)

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Telephone settings
Flash time
Restoring default settings
This procedure resets all the personal preferences you have programmed and restores the
telephone to default mode.
Press the programming key.
Press 9.
Enter your PIN.
Press the programming key to save the setting.
Z
PROGRAM
PROGRAM
The flash time has been set to 600 ms, which is most suitable to HKSAR
flash time manually,it is not recommended as it may cause dysfunction of
certain product features.
telecommunications network setting. Though it is possible to change the