Location Verification By Isdn Or Gps - Lancom 1751 UMTS Manual

110584_LC-1751-UMTS-MANUAL-EN.book Page 36 Tuesday, February 26, 2008 5:16 PM
LANCOM 1751 UMTS
Chapter 3: Basic configuration
3.5

Location verification by ISDN or GPS

After being stolen, the device can theoretically be operated at another loca-
tion by unauthorized persons. Password-protected device configurations offer
no protection from the operation of the RAS access, LAN coupling or VPN con-
nections that are set up in the device; a thief could gain access to a protected
network.
The device's operation can be protected by various means; for example, it will
cease to function if there is an interruption to the power supply, or if the
device is switched on in another location.
3.5.1 GPS location verification
GPS location verification enables a geographical position to be defined within
the device. After being switched on the device automatically activates the GPS
module and checks if it is located at the "correct" position. The router module
is only switched on if the check is positive. After location verification has been
carried out the GPS module is deactivated again, unless it was switched on
manually.
3.5.2 ISDN location verification
ISDN location verification can prevent the misuse of a router. Each time it is
switched on, the router carries out a check by making an ISDN telephone call
to itself to ensure that it is installed at the intended location. Only after suc-
cessful location verification is the router module activated.
Prerequisites for successful ISDN location verification:
3.5.3 Configuring location verification
LANconfig Parameters for location verification are to be found in LANconfig in the con-
figuration area 'Management' on the 'Location' tab.
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The device must be reachable from the public ISDN telephone network.
The device needs two free B channels for the duration of the check. If just
one channel is free, e.g. one channel at a point-to-multipoint connection
with two B channels is being used for a telephone call, then the device
cannot make a call to itself via ISDN.
You can enable the GPS module on the 'GPS' tab independently from
the location verification e. g. for monitoring the current GPS coordi-
nates using LANmonitor.