Alphatech IP-VarioBell IPVB-00, Installation And Operating Instructions Manual

Page: 69 / 91

IP VarioBell
- installation and operating instructions 69
4.5.2 Audio setting
After performing of changes please don
’t forget click on „Save“.
Speaker Microphone gain
– amplification setting
ECHO limiter
– it is designed for Echo cancellation which is created by
distortion of loud signal.During standard door entry call is working
automatic adaptive echo canceller which cancel the echo after cca 3
seconds of talk and call is full duplex. The setting is : High intensity
signals coming from phone to speaker of door entry are distorted and
automatic echo canceller cant process them. This level of
treshold
you setup (in %). How much should be reduced signal returning
through microphone input is adjusted by
attenuation . Delay of
returning signal is adjustable by samples amount.
Tone
– here you select acoustical signalling of different door entry status.
Options are: - None, this status will not be signalling