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Installation LAN Integration
29
4. Confirm with the Next and Finish buttons.
Note: Please keep in mind that in addition to the operating
system, installed software may possibly set up other compet-
ing services. The installation program of the Aastra 800 com-
munications system monitors allocated ports and indicates
them with a corresponding message. You may have to deac-
tivate or deinstall the software affected.
Tip: You can determine which port numbers are actually allocated
to services at any time using the “netstat” program. Select the
All Programs: Accessories: Command Prompt command in
the Windows start menu. Enter “netstat -a -n” and confirm
with the enter key. The command result shows all queried
port numbers as well as any existing TCP and UDP connec-
tions. Enter “netstat -a -n -b” to display the executable file for
the respective port number.
3.6.3 Deactivating Firewall
Software for protecting Internet communication (Firewall) supervises and blocks
incoming as well as outgoing data traffic. This can as well interfere with data traffic
triggered by the function of the Aastra 800 communications system. In particular,
the dynamic assignment of UDP port numbers of new VoIP calls to be established
is affected. The “Personal Firewall” of the Windows XP operating system cannot be
used with this dynamic port assignment. Deactivate the “Personal Firewall” for the
LAN connection being used with the Aastra 800 communications system. To do so,
you must be logged on as a user with administrator rights.
1. Select the Network and Internet Connections category in the Windows
control panel.
2. Open the Network Connections window.
3. Click on the desired local area connection with the right mouse button. Select
the Properties command from the context menu.
4. Select the Advanced tab in the properties dialog. Click on the Settings button
in the Windows Firewall group.