Siemens IP-Module CFVA-IP - Manual (Page 33)

Establishing access to the device via internet
16 Establishing access to the device via internet
If it is necessary to be able to access your device via Internet, you must ensure
that your IP address is internet-enabled. An Internet Service Provider (ISP) can
supply you with an internet-enabled IP address. The ISP will offer you static or
dynamic IP addresses.
Connecting to internet
Fig. 8 Connecting to internet
Static IP address
The ISP will supply you with an IP address once only. This address does not
change.
Dynamic IP address
Shared IP addresses are normally used when accessing internet through an
ISP. Your router will be allocated dynamic IP addresses for internet access by
your ISP, i.e. when dialing in via an ISP, the client (the computer attempting to
make the connection) will automatically be assigned a temporary, free IP
address when logging on. This means that the client acts as an internet server
for the time it is on-line.
The term 'dynamic' means that the connection to the ISP will be broken off
briefly at regular intervals, every 24 hours for example. When the connection is
re-established, your IP address may have changed. When the connection is
terminated, this IP address becomes available for use by another device and is
allocated to another connection that is established via the ISP. When the
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