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

Page: 38 / 91

IP VarioBell
- installation and operating instructions 38
3.2.3 Call
Door entry IP VarioBell has adaptive ECHO canceller. The Echo dissapear
usually within first 5 seconds of call. The call is then full duplex. The end of call
happen:
- Called party hang up
- Call duration time is over (when is setup)
- By button press(when is setup)
3.3 Visitor inside building
By person inside building is person who is in communication with door
entry IP VarioBell.
3.3.1 Outgoing call
Outgoing call is call from door entry (start by visitor). After door entry dial
is ringit phone inside the building. When call is picked up you can talk to visitor
at door and by code dialling you can activate relay. Door entry sends 10sec
before call end notification about time limit of call and by dial character (* / #)
you can prolong the call. By phone hang up the call is ended.
All transmission ways of info about button press are available (for
example code to activate relay)
– either in “RTP channel – RFC2833” or in
“SIP info” and “inband DTMF”.
3.3.2 Incoming call
Incoming call is call to door entry (start by person inside building). After
dial of extension number or IP adress where is connected door entry IP
VarioBell the door entry is ringing and after preprogrammed number of rings
picks up the call. You can talk. Possibilities are the same as outgoing call
(activate relay, prolong the call etc.).