Chapter 4: Using the web interface
98-129217-D Setting up the interfaces 77
Locking an IP address to a MAC address
When the device is locked to an IP address, the terminal will always assign this IP address to
the MAC address of this device.
To lock a device to its current IP address, click the link next to the device.
The device is then locked to the current IP address and added to the list of locked IP addresses
at the top of the page.
To unlock a device from the IP address, click Delete next to the device in the LOCKED
IP ADDRESSES list.
Definitions for network terms
APN (Access Point Name)
APNs are provided from the Airtime Provider. They may also be defined on the SIM card
The APN is used by the network user to establish a connection to the required external
network. This means that the terminal must know the APN in order to be able to connect to the
external network.
Header compression
The Header of a data packet contains control information belonging to that packet. The
information in the Header can take up a considerable amount of bandwidth. In order to save
bandwidth, you can use Header Compression, meaning you compress the header information,
leaving some of the information out.
You can select whether or not to use Header Compression for your data transmission.
NAT (Network Address Translation)
NAT enables a local-area network to use one set of private IP addresses for internal traffic and
an assigned or static IP address for external traffic. The built-in NAT module in the terminal
makes all necessary address translations between the local-area traffic and the external traffic.
If more than one user is connected, you must select a network user group with Router mode
to use the NAT of the terminal.
You can only lock an IP address to a MAC address if DHCP is enabled (see Setting up
the local LAN IP addresses on page 66) and the Internet connection is not a Bridge
mode connection.
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