Akuvox E21 Series - Input

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Username & Password: Users can setup the username and
password for HTTP unlock.
URL format:
http://IP_address/fcgi/do?action=OpenDoor&UserName=&Password=
&DoorNum=1
3.6. Input
E21 series supports two input triggers Input A/B(DOOR A/B),
and go to Intercom->Input to configure.
Input Service: To enable or disable input trigger service.