Panasonic GD87 - Manual (Page 62)

Setting the Maximum Unit Level
This function allows the user to pre-determine the maximum
cost of calls made.
From Idle mode:
Note: The duration of one unit may vary during the day, peak
and off-peak times. Therefore, the call charge can be calculated
accordingly. However, call charge information may not give an
accurate reflection of the tariffs charged by your service
provider.
Setting a Warning Level
A warning can be set as an indication that the maximum cost is
about to be reached. This function is SIM dependent.
From Idle mode:
Call Identification
In the Call Service menu, the Caller’s ID and Withhold ID
functions allow you to check the status of whether a Caller’s
Identification is sent or can be received.
Note: When checking the status the phone must be registered
with a network.
64
Call Information
Call
Information
Call
Information
Phone Option >
Call Service >
Service Charge >
Max Cost
x 3
Enter maximum units permitted
(corresponding cost will be displayed)
Enter security
code
x 2
Phone Option >
Call Service >
Service Charge >
Warning At
x 2
Enter value in units at which
point warning will sound x 2