AXIS A8207-VE Mk II Network Video Door Station
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SIP
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User agent A - door station. SIP address: sip:192.168.1.101
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User agent B - SIP-enabled phone. SIP address: sip:192.168.1.100
You can set up the Axis door station to call for example a SIP-enabled phone on the same network using a peer-to-peer SIP setup.
Private Branch Exchange (PBX)
When you make SIP calls outside your local IP network, a Private Branch Exchange (PBX) can act as a central hub. The main
component of a PBX is a SIP server, which is also referred to as a SIP proxy or a registrar. A PBX works like a traditional switchboard,
showing the client's current status and allowing for example call transfers, voicemail, and redirections.
The PBX SIP server can be set up as a local entity or offsite. It can be hosted on an intranet or by a third party provider. When you
make SIP calls between networks, calls are routed through a set of PBXs, that query the location of the SIP address to be reached.
Each SIP user agent registers with the PBX, and can then reach the others by dialing the correct extension. A typical SIP address in
this case would be
sip:<user>@<domain>
or
sip:<user>@<registrar-ip>
. The SIP address is independent of its IP
address and the PBX makes the device accessible as long as it is registered to the PBX.
Example
SIP
SIP
SIP
1
2
3
PBX
PBX
PBX sip.company.com
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When you press the call button on an Axis door station, the call is forwarded through one or more PBXs to a SIP address either on the
local IP network or over the internet.
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