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Siemens Hicom 300 Set T24/t25 Operating Instructions

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Night Service
When the night bell rings
- dial 
* ** *
*88
- you are now connected to the caller
Check with System Administrator if any other type of Night Service is
operational.
Key Settings (+/–)
The Plus and Minus keys allow for the individual setting of the levels of speech,
ringing, ring tones and display contrast.
Change Speech Volume
- whilst busy on a call
- press + or – keys to adjust Speech volume
- press + and – keys simultaneously to store setting
Change Ringing volume, Ring Tone frequency or Display contrast
- Do not lift handset
- press + and – keys simultaneously
- display shows selection for keys 1,2,3 and 4
- press 1 and then + or – keys to adjust Ringing volume
- or 2 and then + or – keys to adjust Ping Ring volume
- or 3 and then + or – keys to adjust Ring Tone frequency
- or 4 and then + or – keys to adjust Display contrast
- press + and – keys simultaneously to store setting
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