DESCRIPTION
BDesc2 68P09304A85
19/07/97 3
1.3 SERVICE AREA
The area within which calls can be placed and received is
defined by the system operators. (Because this is a radio
system, there is no exact boundary that can be drawn on a
map.) If the telephone is outside a coverage area, the (no
service) indicator will illuminate and calls will be unable to
be placed or received. If this happens during a conversation,
the call will be lost. There may also be small areas within a
particular service area where communications may be lost.
The radiotelephone’s identity information is held by its local
D.C.S. system in its Home Location Register (HLR) and
Visitor Location Register (VLR). The VLR contains identity
information on all local active radiotelephones. Should you
roam to another area, system or country the radiotelephones
identity information is sent to the VLR in the new system.
The new system will then check the radiotelephones details
with your home system for authenticity. If everything is in
order it will be possible to initiate and receive calls whilst in
the new area.
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