2n Helios IP User manual, 1510 v1.13 Instrukcja Użytkownika Strona 9

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Product Description
1.1
9
Modular system up to 54 buttons + keypad
Smart design, top material high-quality stainless steel
Flat design can be mounted without wall cutting
Water resistant
Perfectly hermetic buttons
Electronic part completely separated from the name plates
Electric lock switch controlled directly from the VoIP telephone
Quality white backlighting of buttons white LEDs
DTMF according to RFC2833, in-band
High-quality acoustic parameters
Electronic volume setting (without cover opening) and HandsFree
Electronic adjustment of backlight
Optional Accessories
Vandal resistant Mask
A robust metal cover for increased resistance against vandalism.
The cover price includes a steel wall mounting box.
It can also be purchased additionally.
Additional switch
Normally-open/Normally-closed contact (relay).
Can be switched on for an unlimited period of time.
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