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16
Internet Access
It is possible to connect a complete company network (LAN, Local
Area Network) with the Forum 523/524. All work station comput-
ers within the LAN can then access the Internet via the
Forum 523/524. If Internet access is already available from an
Internet Service Provider, this can also be configured in the
Forum 523/524. The Forum 523/524 provides the IP configuration
required for Internet access. A DHCP server and a DNS server are
integrated into the Forum 523/524 and these handle the adminis-
tration of IP addresses and name resolution for the client
computers.
The Forum 523/524 provides Internet access for all connected PCs
through a common IP address. Only this address is externally visi-
ble in the Internet. Network Address Translation (NAT) translates
the local IP addresses of the client computers to the IP address of
the Forum 523/524. This means that the workplace computers in
the LAN cannot be directly reached from the outside (i.e. from the
Internet) and are thus protected from direct attack from the
Internet. The LAN is additionally protected by the Forum 523/524
filter lists, which can be individually configured (Firewall function).
Note: We recommend you read the explanations in Useful Infor-
mation on Internet Access starting on page 98.
E-Mail
An e-mail function, which can use the POP3, APOP or IMAP4 pro-
tocols to check the Internet Service Provider for incoming mail, is
integrated into the Forum 523/524. Mail account retrieval can be
configured for each member of staff when configuring Forum 523/
524.
Forum 523/524 then fetches the headers (Subject) and sender
information from incoming e-mails from the mail servers at preset
intervals and forwards them to the user's system terminal.
E-mail accounts for sending mail can also be configured for users.
E-mails can then, for example, be sent direct from the Forum CTI
to other users. In addition, users who have had a voicebox config-
ured for themselves can be notified by e-mail of new voicebox
messages.
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