Mobile phone with internal accounting.

DESCRIPTION

RD „PHONE„ NUMBER

Read the phone number of the phone.

RD PHONE CALLS

Read phone's call data activity storage.

RD ^ PHONE TIME

Read the real time on the phone.

UR_PHONE_TIME

Program the real time of the phone.

-1818

RD „PHONE_RTB

LOCK PHONE

UNLOCK_PHONE

RD_CALL_COUNTER

RD_COMNAND „STATUS

RESET CALLS IÍEMORY

RESET „CALLS_COUNTER

RESTRICT_ILLEGALJIALLS

ENA BLE_ALLJ1ALL S

RD_TEL.E PHONE JE SN

UR_NAM

RUIN

WR SCRATCH PAD

Read the revision number of the phone software.

Secure the phone against use.

Unlock the phone for use.

Read the number of calls made during the period.

Read the status of the last command issued.

Restart / clear the call activity storage data.

Reset the call counter to 0.

Restrict all

11ama das i1ega1es.

Deactivate call restriction.

Read the phone's electronic serial number.

Write parameters of ΝΑΓ1 to the phone.

Read the current MAN parameters of the phone. Store a small canti-1919

RD___SCRATCH_F^:,AD

UIR_LOCK_DATE

RDJ_OCK „DATE

REGISTRATION data on the phone Read the small amount of data on the phone.

The date on which the phone will stop working.

Read the padlock data on the phone.

The system provider registers to use the phone. (The key is transmitted).

PE DEBIT COMMANDS

WR „CONF_BATA

RD_CONF_DATA

WR_DOLLAR_AMOUNT

RD „DOLLAR„ AMOUNT

D0_CALL_TRACKING

NO__CALL_TRRCKING

DESCRIPTION

Write debit configuration data to the phone.

Read the configuration data of the phone.

Write the maximum dollar amount with which the phone can be used.

Read the maximum dollar amount from the phone.

Turn on call tracking.

Turn off tracking

-2020

DO „I) EBIT_MODE

NO__DEBIT_MODE

ENABLE_AIR „ACTIVATION

DISABLE_AIR_ACTIVATION

OTHER ANSWERS

ACK

NAK

OTHER INTERACTIVE COMMANDS USING THE KEYBOARD

OF THE TELEPHONE

UPDATE_DEBIT „DATA1 calls.

Turn on debit mode billing.

Turn off debit mode billing.

Turn on debit funds activation in the air.

Turn off the activation of debit funds in the air.

DESCRIPTION

Recognition

Cannot understand invalid HOST / PP or LRC.

DESCRIPTION

Update the current additional dollar amount and expiration date over the air by referring to the phone's license number.

-2121

VIEU-CURRENTJWOUNT

UPDATE_DEBIT_DATA2

A suggested protocol Table 1 uses the acronyms of

Note the current dollar amount for debit If for certain reasons the debit data on-air update cannot be completed successfully, the user can obtain a license number to type manually using the keyboard using this function for the set of Commands in next box.

TABLE II

<td>Acronyms</td><td>Description</td>

<td>HOST</td><td>The personal computer from a systems operator will be considered the host.</td>

<td>PP</td><td>The phone unit will be considered the phone peripheral</td>

<td>DB</td><td>One byte of data</td>

<td>CB</td><td>One byte of command</td>

-2222

CTI

ACK

NAK

B C D

A cell phone interference

A recognition from the telephone unit

PP or HOST did not understand the last removed dataset

Coded binary decimal

The HOST computer comprises the satellite processing unit central processing 14 of FIG. 1 or a computer is preferably connected to the central unit 14 which acts as a center for the extensive coordination of the system for accounting and tracking information. The HOST computer, which can be a typical upper-end PC, communicates to telephone units via a driver using a normal Asynchroneous RS232 serial port in a 9600 band, with no parity, a stop bit, data bits, or a common interface designed for a particular manufacturer's phone unit. When the initial activation of a telephone unit on the air route is scheduled, the initial dialogue is accomplished using DTMF signals. A factory phone has limited calling capacity, typically 911 for emergencies. The factory phones 25 are preprogrammed to allow an additional dedicated 800 number, the service provider number of the

-23 system. Once the connection is made via voice dialogue, the phone is switched to paging mode and the service operator starts the STHF code program. The ESN is verified by the HOST and if it is verified as an authorized phone for assignment by the HOST, the ΝΑΓ1 parameters are programmed for the telephone unit (PP), Programming the phone as an internal accounting phone is also accomplished using signals DTNF. For security reasons, it is preferred that the telephone unit be programmed through the driver by direct connection as previously described. A suggested data format for the command set listed in Table I is established in the following paragraphs:

RD_PHONE_NUMBER

HOST and PP interaction;

HOST sends CB to PP

PP sends DBS + LRC (Longitudinal Redundancy Check)

Data from the phone:

DBS is an ASCII string representation of ΠΙΝ. ex- 5108382400

LRC calculation

The LRC, Longitudinal Redundancy Verification, is calculated using the following algorithm:

b = 0X00

LOOP 1 = 0 a data length b = b XOR data II1

LRC = b

The LRC is used when any data bytes, DB, are sent to the PP or from the PP

RD_PHONE_CALLS

HOST and PP interaction:

HOST sends RD_CRLL.S_COUNTER to the PP

PP returns DB for call counter to

HOST

HOST sends GB to PP

PP returns all call data to HOST followed by one byte of LRC (Longitudinal Redundancy Check) (the returning bytes would be number of calls * 17 + 1 for the LRC)

WR_PHONE „TIME

HOST and PP interaction:

HOST sends GB + DB (4) + LRC to PP (LRC would include CB)

PP sends an RCK back to HOST

Data sent to the phone:

The CB, RD-PHONE-TIME, is sent followed by 4 bytes containing the MMDDHHMM in BCD. The month, day, hour, and minute are each in the form of a BCD byte

Example:

e.g., for January 1, 1980 at 1:00 pm the DB would be 01011300 where 01, 01, 13 and 00 are all bytes

RD_PHONE_TiriE

HOST and PP interaction:

HOST sends a GB to PP

PP sends back a DB (4) + LRC to HOST

Data sent from the phone:

The data sent from the phone is identical to the data sent to the phone in WR_PHONE_TIME

Example

e.g. by February 2, 1999 at 2:12 pm the DB bytes would be 02021412 etc.

RD_PHONE_RTB

HOST and PP interaction:

HOST sends a CB to PP

PP sends your program review number back in some relevant format to the phone + LRC

Data sent from the phone:

TBD. Specific to the manufacturer's phone

LOCK „PHONE

When the phone is in the lock mode ”_F the phone should display the word secured on the main visual display screen - The phone is completely disabled while in this mode until the HOST sends the UNLOCK-PHONE command. The purpose of this mode is to insure the phone between rents or debit rents. While in this mode, it prevents users or employees from stealing airtime. Also, if the phone is stolen while in this mode the phone will not work. This non-utility character provides a sense of security for the telephone provider.

HOST and PP interaction:

HOST sends a CB to PP

PP sends an ACK back to HOST

UNLOCK_PHONE

This mode is just opposite to LOCK ~ PH0NE or lock mode. In this mode, the phone is fully usable.

-26 HOST and PP interaction:

HOST sends CB to PP

PP sends an ACK to HOST

RD_CALL_COUNTER

This comment allows HOST to read the current number of calls that have been made on this phone during your rental. From there, HOST can use this as data to present to the user and use this data to determine the number of bytes the phone will send when the RD PHONE-CALLS command is sent.

HOST and PP interaction:

HOST sends CB to PP

PP sends DB (2) + LRC to HOST

The two data bytes are 16 bits from the most significant bit to the least significant bit. These two bytes represent the number of calls that have been made on the phone. The last or third byte is an LRC.

RD_COMMAND_ STATUS

At any point during the interrogation of PP by the HOST, the HOST can send this command byte, CB, to determine the status of the last command sent. Even though ACK's and LRC's are used this provides a review of the general state in the PP.

HOST and PP interaction:

HOST sends CB to PP + LRC

PP sends DB (2) + LRC back to HOST

Data sent from PP:

The DB byte sent from the phone can be used to diagnose internal problems that have occurred in the phone. If the last command and the current state of the phone is good, the DB must be 0x01. The rest of the byte values ​​can be left up to the manufacturer to decide what specific phone information can be returned by means of this byte.

RESET.CALLS.MEMORY

If the DO.CALL.TRACKING has been turned on during a rental period, the phone will have been storing call data in 17-byte memory blocks per call. This start is used to either clear memory or simply reset a pointer in memory for call data.

HOST and PP interactions:

HOST sends an OB to PP + LRC

PP sends an ACK to HOST

RESET.ILLEGAL.GALLS

The service provider has created a small algorithm that allows a phone to carry out call restriction. This! Character allows the service provider to disable segments of numbers or all numbers right in the source; the phone.

HOST and PP interaction:

HOST sends an OB + DBÍ63) + LRC to PP

PP sends an ACK to HOST

Data sent from HOST:

KL = Key length, count of digits to use for the search 1 byte

KEY- The actual digits for the search 7 bytes

ODS ~ Deviation from end of string of digits for search 1 byte

Total: 9 bytes

The total number of numbers to block is 7 which gives us 7 * 9 - 63 bytes of configuration data.

ENABLE.ALL.CALLS

This command disables the call restriction feature »If this command has been sent to the phone, then steps 2.0 and 2.1 are executed in the call restriction algorithm. On the other hand, if the RESTRICT_ILLEGAL_CALLS is sent to the phone with the configuration data, the phone will be placed in the call restriction mode.

HOST and PP interaction:

HOST sends CB ¿i PP + L.RC

PP sends PCK to HOST

RD_TELEPHONE_ESN

The HOST requests the ESN and the phone transmits the ESN to the HOST. The ESN is the only non-changeable part in the NñM by which phones can be tracked.

HOST and PP interaction:

HOST sends CB to PP

PP sends DBCX) + LRC to HOST

Data sent to HOST:

The data that is sent to the HOST depends on the format that the manufacturer is using.

WR.NAM

Writing the NPM through the HOST provides certain benefits that are:

one. Poor scheduling by employees which leads to poor service;

2. Fraud prevention since the phone can only be programmed by means of this' command; therefore, this prevents an individual from simply stealing a rental phone and obtaining the service elsewhere;

3. Move phones safely and effectively from one place to another; and

Four. No on-site debit / rental training is required to activate on the phone.

The following is a general list of parameters that may need to be programmed into an analog cell phone:

MIN, mobile identification number

SID, system ID (one side is A while side B is an even number)

GIM, Group Identification Mark / ID (typically 0-15)

LUM, Local Use Mark (0 or .1)

EX, class min (0 or 1)

ACCOLC, access overload class (0 + last digit of MIN)

LOCK, the user's lock code

SS, system selection (A-solo, B = solo, or normal AB / BA mode)

ICPH, Initial Locating Channel (334 B, 333 A)

HOST and interaction:

HOST sends CB DBÍX) - LRC to PP

PP sends ACK to HOST

Data sent to PP

NAM data is somewhat standardized, however every phone manufacturer usually has an intrinsic protocol to do just this.

RD_NAM

RD-NAM, or Read NAM, works exactly the opposite of UR-NAM or Write NAM. Again, this is typically already established on a manufacturers phone.

HOST AND PP interaction

HOST sends CB to PP.

PP sends DBÍX) + LRC to HOST.

-3030

UR „SCRATCH_PAD

This memo pad is a segment of memory that the system provider can use to store important information on the phone. This information can be credit information, rental information or derivation of information in multiple places. By having the ability to store a small amount of data on the phone, the system provider can open doors to many new functions. This also provides the system provider with the ability to allow future software updates that can take advantage of this memory. Any size up to 1K, 1024 is suitable

HOST and PP interaction

HOST sends CB + DB (X) +

LRC To PP

PP sends an ACK to HOST

RD_SCRATCH_PAD

This is the exact opposite of WR-SCRATCH-PAD.

With this command, the phone will send the memo memory to HOST.

HOST and PP interaction

HOST sends CB to PP

PP sends DB (X) + L.RC to HOST

WR_LOCK — DATE

Create the ability to notify the phone to interrupt at some date.

-3131

HOST and PP interaction

HOST sends CB + DB (3) · * · LRC to PP

PP sends an ACK to HOST

Data sent to PP

The data date format is slightly different in that it does not contain weather information and contains year information. The BCD YYMMDD format (ARo-Month-Day).

Example from July 1968, would be 680721

RD_LOCK — DATE

This is the exact opposite of WR_LOCK_DATE_BThis is used to check or find what current closing date is on the phone.

HOST and PP interaction

HOST sends CB to PP

PP sends DB (3)&gt; LRC to HOST

Data sent to HOST

Data DB (3) is a date in the format described in

UR_LOCKJATE.

REGISTRATION

This registration command acts as a function of

-3232 security for the phone manufacturer and system provider. Before any HOST and PP interactions can occur, HOST must send this command followed by the password. From that point, any command issued should work. If this command has not been issued, then the PP must not respond to any HOST command.

HOST and PP interaction

HOST sends CB + DB (16) + LRC to PP

PP sends DB (16) + LRC to HOST

Data sent to PP

The access key data can be a default access key selected by the system provider.

Data sent to HOST

The data entry then echoes back to HOST. This helps show the relationship between the system provider and a customer such as a phone vendor.

WR_CONF_DATA

This is the configuration structure that contains all the necessary parameters to provide a debit service. This data includes items such as dialing information, related and other configuration information, including the complex billing algorithm that allows

-3333 internal calculation within the telephone unit. Once this data is in position and the DO__DEBIT_NODE command is given, the phone will begin to use this information to process call charges.

RD__CONF_DATA

This command will read back the configuration data that was written by WR_CCNF_DATA.

HOST and PP interaction

HOST sends a CE to PP

PP sends DB (X) + LRC to PP

Phone data

This data (DE (X) is the size of the data structure discussed in UR__CONF_DATA. This may vary depending on implementation and phone restrictions. After .15 data, there must be an LRC.

UR_DOLLAR_AMOUNT

This command is used to update the current dollar limit on the phone. Since this is a single command, there remains a high risk of fraud. Therefore there is an extra data bit that helps deter fraud implementation.

-3434

HOST and PP interaction

HOST sends CB - * · LICENSE NUMBER + LRC to PP.

PP sends an ACK to HOST.

Data sent to the phone

HOST will send a CB and then a valid license number followed by an LRC. This license number is the same license number that is transmitted over the air to the phone or sent manually using the key key.

RD_JDOLLAR_ñMOUNT

This command returns the current dollar amount on the phone.

HOST and PP interaction

HOST sends a CB to PP

PP sends DB (2) * LRC to HOST

Data sent to HOST

DBC2 data) in the two dollar data bytes with the first most significant bit and the last least significant bit.

Example

DB (2) - 00 02, which could translate to value 2.

-3535

DO_CALL_TRACKING

This command returns to the call trace function. If the phone is in call tracking mode, the phone will save, see the RD_PHONE_CALLS command, all calls made so that it can be used to load the user's account at a later time.

HOST and PP interaction

HOST sends a CB to PP

PP sends an ACK to HOST

NO_CALL „TRACKING

This command returns to the call trace function. This command is useful when the phone provider wants to leave a phone out in the field for long or indefinite periods. This command could be used on 15 debit phones set up at the factory or distribution center, so it would be ready for the retail market.

HOST and PP interaction

HOST sends a CB to PP

PP sends an ACK to HOST.

DO_DEBIT_riODE

This command alerts the phone to start

-3636 process and use data from WR__CONF_J) ATA and UR_DOLLAR_AMOUNT. When this mode is active, the phone begins detecting every phone call during debit money while the phone is in use. Based on the configuration data supplied by WR_CONF_DATA, the phone would decrease the UR_DOLLAR_AMOUNT every minute while the phone is in use.

HOST and PP interaction

HOST sends a CB to PP

PP sends an ACK to HOST

NO_DEBIT_MODE

This command alerts the phone not to process debit.

This will most likely be used whenever a customer wants to track calls from a user on a periodic basis such as in a rental situation. Again, if call tracking is enabled and this command is issued, calls are only tracked and the phone should close when the memory is full.

HOST and PP interaction

HOST sends a CB to PP

PP sends an ACK to HOST

-3737

ENABLE _AIR_ACTIVATION

The reason for the ENABLE_AIR-ACTIVATION and DISABLE_AIR_ACTIVATICN fis commands for a client who does not want over-the-air debit activation for their client users. By changing the activation to the air, the client has less room for fraud. This old feature is also used to create a value-added phone or different models of the same phone, etc.

HOST and PP interaction

HOST sends a CB to PP

PP sends an ACK to HOST

ENA BLE_AIR_ACTIVATION

When this command is sent to the phone, the phone will no longer accept debit updates using DTMF tones. The only way a phone could then receive an update is through the keypad or through a self-service transaction station.

HOST and PP interaction

HOST sends a CB to PP

PP sends an ACK to HOST

When the previous group of commands has been

-3838 implemented to establish the interface protocol between

HOST, here central control unit 14, and PP, here mobile phone unit 30, the phone unit is programmed to respond to HOST and limited user commands as indicated 5 - The group of commands allows a communication dialogue between the central control unit or its substitute, and the telephone unit.

When the WR_CONF_DflTA command is run, the phone unit is loaded with the necessary data and code, including the complex billing algorithm to allow the phone unit to function as a debit phone upon entry and execution of the DO „DEBIT__MODE command.

The complex billing algorithm factorizes the multiple variables of a phone call from a mobile phone into a billing equation that virtually reflects the factors considered by the network switched public providers and wireless service providers involved (of which you can have more than one involved in a single call). The resulting call charge approximates exactly the sum of actual charges that will be factored by the providers involved allowing for an instant charge calculation.

Naturally, any deviation errors are programmed to favor the calculation system provider to minimize potential e.1 under billing. By incorporating a rate table into telephone unit 30, it is avoided

-3939 dialogue with the provider system which may be a separate entity from the wireless service provider. Since the rate table used by the complex billing algorithm can change at any time, the mobile phone system of this invention provides over-the-air updating of the internal rate table in each telephone unit at the start of the system provider . Each phone unit can be shared and updated by him. system provider during idle hours .. Preferably, the updated rate table is coded¹) when the user requests an increase in the internal telephone account.

In the description of the complex billing algorithm, the acronyms in Table III were used.

TABLE III

Acronyms

BIT data bit (Used as a flag)

BYTE bits of unmarked type (As an unmarked character in C language)

INT bits of type not signaled (As a short int no signal hoisted in

BYTE [#]

It is a language C number of bytes) (As a storage compensator)

-4040

DECIMAL

Up to 32 bits (Like a float in

C / only a decimal number)

REGISTRY

A collection of the above types

The call log configuration structure that allows the billing data to be established for the calculation of charges is shown in Table IV.

TABLE IV

REGISTRATION of configuration data.

// These data will indicate to the phone how to invoice calls in any country in the world.

<td>BYTE</td><td>Digits</td>

<td>BYTE</td><td>Digits</td>

<td>BYTE</td><td>Digits</td>

<td>BYTE</td><td>Digits</td>

<td>BYTE</td><td>Digits</td>

<td>BYTE</td><td>Digits</td>

<td>BYTE C71</td><td>Code</td>

International Maxima

International Minimum

Long Distance Maxima

Long Distance Minimum

Local Highs

BYTE Γ71

BYTE

Minimum Local Access International

Larga Di stand Access Code.

Is the long distance access code always required?

BYTE C71

Third party / operator / call prefix

Card digits

-4141 // Locator Information.

<td>INT [5]</td><td>5 home phone SIDs (provide location without deviation, etc ...)</td>

<td>INT [5]</td><td>5 home phone area codes (provides computability in congested areas- thionated)</td>

// Rate Information

<td>DECIMAL</td><td>Base access charge per minute (applies to all calls)</td>

<td>DECIMAL</td><td>Additional long distance charges per minute</td>

<td>DECIMAL</td><td>Additional international charges per minute</td>

<td>DECIMAL.</td><td>Additional location fees for day</td>

<td>DECIMAL</td><td>Additional location fees for minute</td>

<td>DECIMAL</td><td>Additional operator support charges, calling card or third party billing, or call surcharge for call content</td>

//Other information.

<td>BYTE</td><td>Basic billing delay</td>

<td>BYTE [31</td><td>By YYMMDD date, the phone will close and will exhibit DATE - L.OCKED</td>

<td>BYTE C71</td><td>Unbilled area code (expanded</td>

-4242 7-digit long distance manual for third world)

BYTE L31 YYMMDD is the last date that this phone was in location

BYTE 15] 11.11 A block of 5 unbilled phone numbers to call (ie., 911 and any other user defined

INT 1201 A block of 20 random numbers (1000,9999) if the value for license number is decoded

The configuration data for the above registration fields is explained as follows:

International Maximum Digits.- This is the maximum length of a country code. For example, the United States has a country code of 1 while Venezuela has a country code of 58. If these were the only two countries in the world, then the maximum international digit would be

2. This is not the case and you typically have this group of either three or five depending on billing demand.

Minimum of International Digits.- This is the minimum length of a country code. This will be in almost all cases, set to 1.

Maximum Long Distance Digits.- This is the maximum length of a City area code. This varies greatly in third world countries. In the United States of

-4343

America will always be set to 3 because all area codes have a length of 3. However, some country area codes vary from 1 digit to 5 or more digits.

Long Distance Minimum Digits.- This is just the opposite of the long distance maximum. Again, for the United States of America it will always be set to 3 but it varies outside the United States of America.

Maximum of Local Digits.- This is the maximum length of digits that it takes to dial a local number. In the United States of America it is set at 7. However, this varies greatly in other countries.

Minimum of Local Digits.- This is the minimum length of digits that it takes to make a local call. This varies greatly even in the United States of America. This can be used to create different billing effects. However, due to the range of the debit phone, this will most likely always be set to 0 or to the United States of America only. (0 would answer for an incoming call).

International Access Code. · This is the required prefix that must be dialed to make a directly dialed international call. From the United States of America a customer could dial 011 + country code + City / area code * local digits to place an international call. This varies greatly from country to country. A length of 7 in the description above provides the system provider with the ability to serve places like the Caribbean. They require a

-4444 7-digit normal number as a prefix. (This is just an example of a place in the Caribbean).

Long Distance Access Code. This is the digit or digits that are required for a user to dial and make a long distance call. From the United States of America, the user would dial a 1 +, sometimes called a 1 + dial. In other countries, this ranges from a simple 0 to a few longer digits, for example 108 for the Philippines.

Long Distance Access Code Required? - In some cellular systems, it is not required to dial the long distance access code to make a long distance call. For example, in San Francisco if one were to request information in Utah, all one would have to do is dial 801-555-1212; 1-80.1-555-1212, would also reach the same place. If the long distance access code is required, the accuracy of the billing algorithm will help.

Third Party / Operator / Calling Card Prefix.- Essentially these are the digits that must be dialed to reach the operator. In the United States of America, 0 is the digit needed to reach the operator. It is also the digit required to make a group call or a credit card call.

Billing Delay.- After x seconds have elapsed, billing will begin. Since the phone does not know exactly when the

-4545 call, this connection has to be approached. If the call is delayed under these x seconds, then the call is not charged to the user. However, if the call lasts x seconds, then the call is loaded to the user the time they are SND to END or the call is interrupted.

Home SID.- This is the cellular ID system that this phone has assigned.

Home Area Code- This is the area code for the cell phone number or MIN, Mobile Identification Number.

Base Access Charge per Minute.- This rate is added to each telephone call made. This is the base rate for the phone call. The only way this rate might not be added is if the billing delay has not been reached.

Additional Long Distance Minute Charge.- This rate is added on top of the basic access rate when the call made is classified as a long distance call.

International Additional Fee per Minute. - This rate is added to the base access rate when the call made is classified as an international call.

Additional Location Fee per Day, - This fee is added to the base access fee when the call is a location call and this charge has not been applied yet.

-4646

Additional Location Fee per Minute. - This fee is added on top of the base access fee and enables the additional paging charge per day when the call is a paging call.

Additional Operator Assistance Fee. - This fee is added on top of the base access fee when the call begins with the third party / operator prefix digit or digits or is a surcharge for call connections identified as transfer calls. data or the like.

Closing Date .-- This is the date the phone no longer works. The phone will display DATE „LOCKED and will not be able to be used until it is reprogrammed using HOST or a license number.

Unbilled Area Code.- This is an area code or number that is not billed. This could be set at 800 for the United States. (NOTE: only the long distance part of the charge is not billed).

Last Date the Phone was in Location. This is used to store the last date that the customer charged location per day. If a call is in location and the current day is not equal to the last date the phone was in location, then the location charge per day would apply.

Billed Numbers.- This is a block of at least 5 numbers of 11 digits in length that provide the

-4747 flexibility not to bill for certain called phone numbers. Numbers like 911 or other special numbers such as * 18 for location. Any unbilled number can also be dialed even if the phone is out of money or closed. In this way, if the user's phone runs out of money in debit mode, the user can use that same phone to call an unbilled number, such as customer support to increase their credit on the phone.

Random Number Block.- This is a block of numbers ranging from 1000-9999 that are used in decoding license numbers.

The complex basic billing algorithm calculates call charges for the basic categories of local calls, long distance calls, international calls, and location calls. While the algorithm allows the composition of categories, the types of calls are a complex of factors, for example, incoming long distance location call. The algorithm easily expands to handle other categories, for example data transfer calls, for which deductions or sub-charges may apply.

To classify a call, the following factors covering virtually all situations were considered:

Local Call.- If the digit length of the

-4848 call is less than, or equal to, the maximum of local digits and the length of digits of the call is greater than or equal to the minimum of local digits, so it is a local call.

Long Distance Calling · - First, long distance calls are more troublesome to classify because there are so many possibilities. However, this can be reduced to very few tests.

If the number begins with the long-distance access code, then subtract the length of the long-distance access code from the length of the digits of the call- (that is, if you dial 1-510-838-2400, the length is 11 - 1 - 10).

If the recalculated length of the calling digit is less than or equal to (The Maximum Local Digits + The Maximum Long Distance Digits) and the length of the calling digit is greater than or equal to (The Minimum Local Digits + The Digits of Long Distance Minimum), then:

If the call does not start with the Long Distance Access Code and the Long Distance Access Code Required flag indicates yes, then that call is not a legitimate long distance call. (This is useful in the third world) „

The following special cases are considered:

- Is a .call paging?

If the STD, in which the phone is at the time the call is placed, is not equal to any of the 5

-49 Base SIDs, then the call is paging Operator-Assisted Calls / Third-Party Prefix

If you start any call with the third party prefix, then the call should not be billed at all.

- Delay in Billing

If the call lasts within seconds of the billing delay, then the call does not have to be billed at all.

- Arrow Lock

If the current arrow is equal to or greater than the current lock arrow, the phone should be locked and display LOCKED TO DATE.

The following examples provide an overview of how calls are charged:

<td>M</td><td>= Number of minutes</td><td>than</td><td colspan="3">»The call lasted</td>

<td>L</td><td>= Minute Fee</td><td>by</td><td>the</td><td>Call</td><td>Local</td>

<td>LD</td><td>- Minute Fee Distance</td><td>by</td><td>the</td><td>Call</td><td>Long</td>

<td>ITEM</td><td>= International Minute Fee</td><td>by</td><td>the</td><td>Call</td><td></td>

<td>RD</td><td>= Location Day Charge</td><td>the</td><td colspan="2">Call from</td><td></td>

<td>RM</td><td>= Minute Fee Location</td><td>by</td><td>the</td><td>Call</td><td>of</td>

<td rowspan="2"></td><td rowspan="2">Local - Long Call Distance - Call</td><td colspan="2">M * L</td>

<td>m *</td><td>(L + LD)</td>

<td> 5</td><td>International =</td><td>n *</td><td>(L IT)</td>

<td></td><td>Incoming call =</td><td>π *</td><td>L</td>

<td></td><td>Local call from</td><td></td><td></td>

<td></td><td>Location =</td><td>M *</td><td>(L + RM) + RD (If the RD has not been</td>

applied today)

Call Location

Long distance 15

Call

International Location

H * (L + RM + LD) + RD (If the RD has not been applied today)

M * (L + RM + IT) + RD (If the RD has not been applied today)

Once a call has been classified, as close to 20 of the pressing SND as possible, the charges described above should be tracked on a minute-by-minute basis. One reason could be that if a user gets a dropped call or some unexpected termination of a call, the system provider will want to be able to bill a call as close to it as they can based on the number of minutes the user actually spoke. The phone updates the debit amount every minute, over the minute during a call. In this way, for a local call, the minute-by-minute calculation could be as follows:

Total Charge ~ Total Charge + L

User must be notified by tone or ensemble

-5151 tones in the handset and on the phone screen or by the warning lights if there is less than 5 minutes of time left on the communication channels at the current usage rate.

The mobile telephone system of this invention allows activation on communication channels and dialogue with telephone unit 30 using DTMF signals and the announcement system capability of a mobile telephone with a receiver decoder. The current allowable amount in dollars in the internal account of the telephone unit can be improved on the communication channels. During the DTMF dialogue between the system provider's central processing unit and the user's phone, the encrypted license number of the user's phone is transferred and verified. The user's account is reviewed to determine if the improvement is guaranteed or is indicated as a credit risk. The upgrade amount is encrypted and adapted to the encrypted license number, and transferred to the user along with any upgrades to the rate catalog.

When the user depletes the amount in the internal account of the telephone unit 30, the telephone unit is locked and the visual indicator 33 shows LOCKED EMPTY. The telephone unit 30 is placed in the advertisement service mode allowing the customer service to be used for an account upgrade.

Similarly, when the usage period expires, the

-5252 telephone unit 30 is locked and visual indicator 33 displays LOCKED TO DATE, and is placed in the advertisement service mode. When the user has a low account status, they voluntarily enter the advertisement service mode and contact the customer service department for an account increase.

If desired, the telephone unit, when in the involuntary announcement service mode, may have restricted the announcement service function, allowing only 1 communication to the service center and receipt of a license number. This disables the phone, even as an announcer and prevents theft in the rental area. Alternatively, the telephone unit when locked can retain all of its announcement service capabilities.

It is to be understood that not all the gains from data insurance are considered here and that the security measures to be implemented depend on the means of use, and the position of the system provider in the service network. Enhancements are phone specific and are verified internally on the phone using unique parameters for the phone unit. The license numbers after verification are not stored or known by the user except in encrypted form.

The mobile phone system of this invention provides considerable flexibility for the features described. Phone retailers can sell and activate phones in the

-5353 place without © special team. Additionally, phones with internal accounting take into account prepaid service and call usage charges allowing the retailer to form a credit judgment or cash sales regardless of the service provider. Additionally, the work of the system provider may be assumed by the retailer, the service provider or an independent entity that assumes the risk or provides only cash prepayment transactions.

Although, in the foregoing, the embodiments of the present invention have been set forth in considerable detail for the purpose of making a complete description of the invention, it may be apparent to those skilled in the art that numerous changes can be made in such detail without deviation of the spirit and principles of the invention.