Motorola V8162, Service Manual

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16 10/23/00
initiates a call in cell A and then moves across the sys-
tem area through cells B and C to cell D. As the phone
moves into cell B, it is instructed to change to a differ-
ent frequency that operates through the B cell
on that frequency. A similar change is performed
when the phone moves from cell B to cell C and again
when the phone moves from cell C to cell D. In this
example, the radiotelephone has operated in four cell
sites, through four cell sites, and on the same spread
spectrum without interruptions in voice communica-
tions. As the radiotelephone leaves a cell, the fre-
quency on which the phone and base station were
operating is made available to another subscriber in
that cell. Since this radiotelephone is dual mode, the
radiotelephone can operate in either a CDMA system
or Analog system.
Service Area
The area within which calls can be placed and
received is defined by the system oper-ator.
(Because this is a radio system, there is no exact
boundary that can be drawn on a map.) If the portable
is outside the radio service area, a No Svc (no service)
message will appear on the phone’s display, and calls
cannot be placed or received. If this happens during a
conversation, the call is lost. Places where the ability
to place or receive calls would be lost are in totally
enclosed areas, such as underground parking garages,
in buildings without windows, and in elevators. This
situation would be indicated either by the No Svc
message illuminating, or by the sound of either a fast
busy signal or a high-low siren signal when call place-
ment is attempted. General usage in buildings having
reason-able glass area is usually quite good.
However, it may be necessary to move closer to a
window to ensure reliable opera-tion.