Aastra 4425 IP Vision (SIP) for MX-ONE User Guide Instrukcja Użytkownika Strona 105

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Accessories
Dialog 4425 IP Vision106
To activate Headset Preset:
Í
Press and hold for at least 4 seconds.
A short acknowledgement tone signal is heard, and the Headset
symbol is displayed.
To cancel Headset Preset:
 Press and hold for at least 4 seconds.
A short acknowledgement tone signal is heard, and the Headset
symbol is switched off.
To check the current preset setting:
Ô Line/Hold Press.
Either the Loudspeaker or Headset key lamp is turned on,
indicating the current preset setting.
í Press.
Headset volume
During a call, use the Volume keys to change the volume of the
headset.
ì Press to change the volume.
The set headset volume level is stored.
For those with impaired hearing, the headset hearing volume level
can be further amplified, use the same procedure as described in
section “Handset and loudspeaker volume” on page 100.
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