Apparatus for recharging one or more postage meters.

0001This invention relates to apparatus for obtaining recharge codes for one or more postage meters. More particularly, it relates to apparatus for automatically obtaining a recharge code for one or more meters selected from a plurality of postage meters. The invention further relates to embodiments which retransmit recharge codes to such selected meters so that they are automatically recharged.

0002Postage meters are devices which have found wide application in many businesses. Such meters are used to frank parcels and mail by printing indicia which are equivalent to postage stamps. Clearly, it is therefore essential that postage meters include a secure mechanism to assure that the meter prints only postage for which the postal service has been paid. Equally clearly, the secure mechanism must allow the postage meter to be recharged (or reset) with additional funds. That is, a mechanism must be provided which will allow the postage meter to print additional postage if and only if an equivalent amount has been paid to the postal service.

0003(Those skilled in the art will recognize that other forms of value, e.g. tax stamps, may be dispensed by postage meter-like devices. As used herein the term "postage meter" contemplates such devices which include a secure, rechargeable mechanism for controlled dispensing of value.)

0004Various schemes have been devised and implemented to obtain the desired remote recharging based on information from a remote data processing center. Typical systems are shown in U.S. Patent No.: 3,792,446, in the name of McFiggans et al, entitled REMOTE POSTAGE METER RESETTING METHOD: and in U.S. Patent No.: 4,097,923, in the name of Eckert, Jr. et al, entitled POSTAGE METER CHARGING SYSTEM USING AN ADVANCED MICROCOMPUTERIZED POSTAGE METER. These patents teach a data processing center which is equipped with a programmed digital computer and a voice answer-back unit to process telephone calls from users of postage meters equipped with either a combination lock such that the lock prohibits recharging of the associated meter until it is unlocked; or in the case of U.S. Patent No.: 4,097,923, having a working memory which contains a seed number for generating postage funding combinations to unlock the meter. The remote system of the latter Patent includes the capability of adding variable amounts of postage to the meter. U.S. Patent No.: 3,792,446, relates only to the addition of fixed increments to the meter. Each of these systems is based on transmission by a postage meter user of information including, or derived from, the contents of the meter ascending and descending registers, the meter serial number, and account number to be debited for the amount of funds to be recharged, and in the case of a variable recharge system, the amount by which the meter is to be recharged. If the data processing center includes a voice answer-back system the operator may transmit the information as DTMF tones over the telephone system or the operator may simply speak to a second operator at the data processing center to transmit the information. In either case the data processing center then provides an encrypted number which may be used to recharge the meter, as is described in the above referenced Patents.

0005As is well known to those skilled in the art the ascending register of a postage meter is a large capacity register which is incremented by the postage amount each time the meter prints an indicia, and thus contains the total amount of postage printed by the meter over its lifetime. The descending register is decremented by the amount of postage each time an indicia is printed and incremented by the amount of funds each time the meter is recharged. The meter, of course, cannot print postage in excess of the amount of funds in the descending register. The total of the ascending and the descending register is equal to the total amount of funds with which the meter has been charged in its lifetime. (Sometimes herein referred to as the control sum.) Since the recharge code is generated using a secure algorithm and is based on information which includes the control sum and the serial number of the meter, it is apparent that each recharge of the meter will require a secure, unique recharge code.

0006Such recharging systems are marketed by the applicants, Pitney Bowes Inc, under the Trademark "Postage-by-Phone", and are described more fully in the above referenced Patents.

0007In the systems described above the recharge code is entered into a postage meter, such as the Pitney Bowes model 6900 Electronic Meter, manually through a keypad by an operator. Alternatively, the information may be entered into the Model 6900 Meter through a communications port which is normally used for communication with a postal scale using a proprietary Pitney Bowes communications protocol described in U.S. Patent No.: 4,498,187 in the name of Soderborg et al.

0008U.S. Patent No.: 3,255,493 in the name of Simjian discloses a system in which the meter communicates directly to a central accounting station for accounting for each and all of the meter operations, either on a real time basis or in batches. A similar system is disclosed in West German Patent Application No.: DE 2,636,852, published February 23, 1978; in which a data transmitting unit is employed to recharge the postage meter over telephone or telegraph lines. British Patent Application No.: 2,147,853, published May 22, 1985, discloses a telephone integrated with a mail franking device, which operates either as a telephone or as a postage meter. The telephone keypad may be used to recharge funds and accounting may be done either locally at the device or in a central accounting unit.

0009Each of the above described devices requires a complex sequence of operations to recharge a postage meter. U.S. Patent No.: 4,812,992, to Storace et al, issued March 14, 1989, discloses a system which attempts to simplify the recharging process. In Patent No.: 4,812,992, a novel postage meter which includes a dedicated communications port, which ispreferably a DTMF transmitter/receiver for telephone communications, is connected over the telephone network to a remote data processing center, such as a Pitney Bowes "Postage-by Phone" center. Each meter has the capability to initiate and complete a recharging transaction with the data processing center whenever its funds (i.e.,the contents of its descending register) fall below a preset limit.

0010While effective, the system of Patent No.: 4,812,992, requires the design and implementation of a new meter and the approval of that meter by the Postal Service in the country where the meter is being used.

0011According to a first aspect of the invention, there is provided apparatus for obtaining a recharge code for a selected postage meter from a data processing center arranged to transmit said recharge code in response to a message from said apparatus and to debit an amount by which said meter is to be recharged to an account, said apparatus comprising: a) input means for input of data; b) first communications means for communication between said apparatus and said data processing center; c) a memory for storing a data base of recharge information relating to a plurality of postage meters; and, d) control means for: d1) responding to data input through said input means to identify one of said plurality of postage meters as said selected meter; d2) accessing said memory to obtain recharge information for said selected postage member; d3) receiving access information relating to said selected meter; d4) forming said message, said message including said access information and said recharge information; d5) controlling said first communications means to transmit said message to said data processing center; d6) receiving said recharge code from said data processing center through said first communications means; and d7) outputing said recharge code.

0012It is therefore an advantage of preferred embodiments of the invention to provide recharge apparatus which is compatible with existing postage meters without the necessity of obtaining approval from a postal service. It is a further advantage of preferred embodiments of the invention to provide a system which is capable of obtaining a recharge code for a plurality of selected meters.

0013Preferred embodiments of the invention include apparatus for automatically obtaining a recharge code for a selected postage meter from a remote data processing center, where the data processing center transmits the recharge code to the system in response to a message from the system and debits the amount by which the selected meter is to be recharged to an account. The apparatus preferably includes a display, input apparatus for entry of data,communication apparatus for communicating with the remote data processing center, a memory for storing a data base of information relating to a plurality of postage meters,and control apparatus. The control apparatus controls the display to display names for each of the plurality of meters, and responds to data identifying one of the plurality of meters as the selected meter, which data is entered through the input apparatus, to access the data base to obtain recharge information relating to recharging the selected meter. The system further receives an access code for the selected meter and forms a message, the message including the meter recharge information and the access code for the selected meter. The control apparatus then transmits the message to the remote data processing center and receives the recharge code from the remote data processing center in response to the message.

0014Preferably the recharge information includes a unique indentification code for the selected meter.

0015Preferably the recharge information includes an account number for an account against which the amount by which the selected meter is recharged is debited.

0016The selected meter may be connected to the system via a second communications apparatus and the system automatically transmits the recharge code to the selected meter.

0017The system may optionally obtain the access code from the selected meter through said second communications apparatus.

0018A plurality of postage meters may preferably be connected to such apparatus for obtaining a recharge code through a second communications means, the system including a data base of information for recharging the connected postage meters.

0019According to a second aspect of the invention, there is provided a method for obtaining a recharge code for a selected postage meter from a data processing center arranged to transmit said recharge code in response to a message and to debit an amount by which said meter is to be recharged to an account, said method comprising the steps of: a) forming an automated data base of recharge information for a plurality of postage meters; b) responding to first data to identify one of said plurality of postage meters as said selected postage meter; c) accessing said automated data base to obtain recharge information for said selected postage meter; d) receiving further data including access information; e) combining said recharge information with said access information to form said message; f) transmitting said message to said data processing center; and g) receiving in response said recharge code.

0020There now follows a description of a preferred embodiment of the invention, by way of example, with reference being made to the accompanying drawings in which: <ul id="ul0001" list-style="none"><li>Figure 1 shows a schematic block diagram of an embodiment of the subject invention.</li><li>Figure 2 shows a schematic block diagram of another embodiment of the subject invention wherein a plurality of postage meters are connected to a system in accordance with the subject invention.</li><li>Figures 3a-3n show a flow chart of the operation of the systems of Figures 1 and 2.</li></ul>

0021<ul id="ul0002" list-style="none"><li>Figure 1 shows a schematic block diagram of apparatus, in the form of system 10, in accordance with the invention. System 10 includes microcomputer 12, which is preferably an IBM PC/XT/AT, or other equivalent compatible commercially available microcomputer, having at least 256K bytes of random access memory (RAM). Conventional keyboard 14 is provided for input of data by a system user and a conventional CRT display 16 is provided for display of data to a system user. System 10 also includes two conventional 360K floppy diskette drives for input and storage of system software and data bases, as will be described below. System 10 also includes a modem 22 for communications with remote data processing center 30. Typically, modem 22 communicates with data processing center 30 over the switched public telephone network, but communication over leased lines is also within the contemplation of the subject invention. Modem 22 will operate at 300, 1200, or 2400 baud, and preferably will be a commercially available modem manufactured by the Hayes Corporation, or other commercially available compatible equivalent.</li><li>Figure 2 shows a schematic block diagram of another embodiment of the subject invention wherein a plurality of commercially available electronic postage meters 40a, 40b, such as the the Model 6900 Electronic Meter, marketed by the applicants, are attached to system 10 through a corresponding plurality of network interfaces, including interfaces 42a and 42b, and network controller 44 to microcomputer 12 of system 10a. Network controller 44 may be selected to support any of numerous commercially available local area networks, but preferably will support a wireless communications network such as a spread spectrum RF wireless local area network operating in accordance with Part 15 of the FCC regulations in the 902-928 Mhz. band. A suitable network controller is available from O'Neill Communications Inc of Princeton, New Jersey, and design of network interfaces 42a and 42b is a routine task easily accomplished once the network is specify by any digital systems designer of more then minimal competence. Further details of the network are not believed necessary for an understanding of the invention.</li><li>Figure 3a shows a flow chart representation of the initial operation of system 10 or 10a, shown in Figures 1 and 2, respectively. At 100 the system displays a start up screen requesting that the user input an identification code and password. (In other embodiments of the subject invention the password or both the password and identification code may be optional.) At 102 the system requests the user to input an identification code and at 104 requests input of a password. At 106 the system tests the identification code and password to determine if the user is recognized as an authorized system user. If either the identification code or the password are not recognized then at 108 the system displays an error message prompting the user to try again and waits for the user response. At 110 the system tests the user response and if the user wishes to retry loops through 102. If the user does not wish to retry, the system exits. Preferably the system will allow only a limited, predetermined number of attempts.</li></ul>

0022Assuming that both the identification code and the password are recognized, than at 112 the system displays the Main Menu and waits for user input. The Main Menu identifies three functions which the user may access: Set Up System, Obtain Account Balance, and Reset Meters. At 116 the system tests to determine if the user has requested the Set Up routine. If so the system, at 118, goes to the Set Up routine as will be described further below. Otherwise, at 120 the system tests to determine if the user has requested the Balance, and if so, at 124, goes to the Balance routine, as will be described further below. Otherwise, at 126 the system tests to determine if the user has requested the Reset routine, and if so at 128, goes to the Reset Meters routine, as will be described further below. If none of the listed functions has been requested at 130 the system tests to determine if the user wishes to quit the session, and if so exits. Otherwise, the system returns to 112 to wait for a further, appropriate response form the user.

0023Figures 3b and 3c show a flow chart representation of the operation of system 10a in executing the Reset Meter function.

0024At 134 system 10a displays a list of meters included in the system data base, and waits for a user response. At 136 the response is tested to determine if a Get Funds command has been entered. If that command has been entered, then at 138 system 10a test to determine if a meter or meters has been selected. If no meter has been selected system 10a returns to 134 to await appropriate input. If at least one meter has been selected then at 139 system 10a goes to the Get Funds routine, as shown in Figure 3c, which will be described further below. Otherwise, at 140, system 10a tests the user response to determine if the user wishes to quit, and if so returns to display the main menu at 112 in Figure 3a. Otherwise, at 144 system 10a tests the user response to determine if the user wishes to select a meter. If the user response is not a meter selection system 10a returns to 134 to await appropriate input.

0025If a meter has been selected, at 148 system 10a determines if the selected meter is connected through network controller 44. If the selected meter is not connected then at 150 system 10a displays a request for manual input of the access code and waits for input. If the meter is connected then at 152 system 1 Oa communicates with the selected meter through network controller 44 to obtain the access code directly from the selected meter. Once the access code is obtained it is entered at 154 and at 156 a request for the recharge amount is displayed and system 10a waits.

0026The amount input is then tested at 158 to determine if the amount is less then the maximum amount as stored in the corresponding record in the system data base. If the amount is greater then the maximum then at 160 an error message is displayed and the system returns to 156. Otherwise, at 162 system 10a enters the amount. Then, at 164, system 10a request confirmation of the meter selection. At 166 the user response is tested, and if selection is confirmed, then at 168 system 10a records the selection of that meter for recharging. Otherwise, the meter is deselected; that is, the selection of the meter is cancelled. In either event system 10a returns to 134 to wait for further appropriate input.

0027Returning to 139, if at least one meter is selected and the user enters a Get Funds command, then at 172 system 10a sets up modem 22 and establishes connection with remote data processing 30. At 174 system 10a performs a conventional test to assure that the connection is properly established. If there is an error then at 176 an error message is displayed, and at 178 system 10a returns to display the meter lists (134 in Figure 3b). Once satisfactory connection is established then at 180 system 10a accesses the meter database to obtain a unique identification code for a selected meter, and an account number for an account against which the recharge amount for that meter is to be debited. This recharge information is combined with the access code and the recharge amount for that meter to form a message, and the message is sent to remote data processing center 30. Data processing center 30 responds to the message to generate a unique recharge code as a secure function of the access code, meter identification, and recharge amount, and debits the recharge amount to the identified account. Thus, a secure recharge code is generated for that meter. (The operation of data center 30 in generating a recharge code is generally known, and further description is not believed necessary to an understanding of the subject invention.)

0028Then, at 182, system 10a transmits the message formed to data center 30 and waits for a response. At 184 system 10a tests for a communications error, e.g., a transmission error or failure to respond, and if a correct response is received saves the response at 186. Then, at 188 system 10a tests to determine if there are messages to be formed for other selected meters. If not system 10a returns to 180 to form a message for the next selected meter.

0029Returning to 184, if a communications error is detected, then at 190 system 10a tests to determine if predetermined retry count is exceeded, and if not, returns to 182 to retransmit the message to data center 30. If the retry count is exceeded that at 192 system 10a determines if there have been any previous successful communications with data center 30 such taht recharge codes have been received. If no recharge codes have been received then at 194 an error message is displayed and, at 196 system 10a returns to display the meter list (134 in Figure 3b).

0030If the test at 188 shows that there has been a correct response to the last message, or the test at 192 shows that recharge codes have been received, then at 198 system 10a goes to the Reset Session Complete function, shown in Figure 3d. Then at 200 system 10a tests to determine if meters are connected. If meters are connected then, at 202 system 10a establishes communications with a selected meter and resets that meter. Then, at 204 system 10a tests to determine if the reset is successful. If there is an error then at 206 an error message is displayed and the reset results are updated. Then, or if the reset test at 204 is passed, at 208 system 1 Oa tests to determine if other selected meters remain to be reset, and if so returns to 202 to reset the next meter. After the last connected meter is reset, or if no meters are connected, system 10a goes to 210 and test to determine if a flag has been set indicating that the reset information is to be saved, and if so at 211 saves this information to a disk on disk drive 20. Then, or if the flag is not set, at 212 system 10a displays the reset results and waits for a user response. At 214 system 10a tests the user response to determine if the user wishes a receipt printed. If so, at 216 system 10a prints a reset receipt and returns to 212. If the user response tested at 214 is not a request for a receipt then at 218 the response is tested to determine if the user wishes to quit. If not, system 10a returns to 212 to wait for appropriate input. If the user wishes to quit then at 220 system 10a tests to determine if a reset receipt has been printed. If no receipt has been printed system 10a displays a print receipt prompt, at 222, and waits for user input. Then at 224 the user response is tested to determine if a receipt is requested, and if so system 10a goes to 216 and continues as described above. If the test to 20 shows that a receipt has been printed, or the test to 24 shows that no receipt is requested the reset session is completed and, at 226 system 10a returns to display the main menu (112 in Figure 3a).

0031System 10, shown in Figure 1 operates in substantially the same manner to execute the Reset Meter function, except, of course, that it need not be programmed to attempt direct communication with a meter. Instead, in system 10 the system user obtains the access code (or codes) from the selected meter (or meters) and inputs that code to system 10; then obtains the corresponding recharge code for each selected meter and enters that code through the meter keyboard.

0032Other functions, described below, are substantially identical in systems 10 and 10a, and are described with respect to system 10.

0033At 230 in Figure 3e system 10 displays a list of accounts and requests the user to select the account or accounts for which a balance is requested, and waits for input. Then at 232 system 10 tests the user input to determine if a Get Balance has been requested. If it has at 234 system 10 tests to determine if at least one account has been selected, and if not returns to 230 to await appropriate input. If one or more accounts have been selected then system 10 goes to the Get Balance function, shown in Figure 3f, as will be described below.

0034If the user has not requested a Get Balance function then at 238 the response is tested to determine if the user wishes to quit, and if so, at 240 system 10 goes to display the main menu (112 in Figure 3a). If the user does not wish to quit then at 242 system 10 tests the response to determine if an account has been selected, and if not returns to 230.

0035If the user has selected an account, at 244 system 10 request confirmation, and at 246 tests the user response. If the account selection is confirmed system 10 records the selection, otherwise the account is deselected. In either event system 10 then returns to 230 to await further input.

0036Returning to 236 if the user has requested a Get Balance function and at least one account has been selected system 10 goes to the Get Balance function shown in Figure 3f, and at 252 sets up modem 22 and establishes connection with data processing center 30. Then at 254 system 10 tests to determine if the connection with data processing center 30 is ok. If there is an error then at 256 an error message is displayed and at 258 system 10 goes to display the account list (230 in Figure 3e).

0037If connection is satisfactorily established then at 260 system 10 accesses the data base and forms a message requesting a balance for a selected account, and at 262 transmits the message to data processing center 30 and waits for a reply at 264 system 10 tests for a communications error, e.g., a transmission error or failure to reply. If a satisfactory reply is received then at 266 the reply is saved, and at 268 system 10 test to determine if this is the last message. If not system 10 returns to 260 to form a message relating to the next selected account.

0038Returning to 264 if a communications error is detected then at 270 system 10 test to determine if a predetermined retry account is exceeded. If not it returns to 262 to retransmit the message to data processing center 30. If the retry account is exceeded then at 272 system 10 tests to determine if any account balances have been successfully received for other selected accounts. If no balances have been received that at 274 an error message is displayed, and at 276 system 10 goes to display the account list (230 in Figure 3e).

0039If the test at 268 shows that there has been a successful reply to the last message, or if the test at 272 shows that account balances have been received at 278 system 10 goes to the Balance Session Complete function, shown in Figure 3g.

0040Turning to Figure 3g, at 280 the balance results are displayed, and system 10 waits for user input. At 282 the user response is tested to determine if a balance receipt is requested and, if so at 284 a receipt is printed and system 10 returns to 280. Otherwise, at 286 system 10 tests to determine if the user wish to quit and if not returns to 280 to wait for appropriate input. Otherwise, at 288 system 10 tests to determine if a balance receipt has been printed, and if not at 290 displays a prompt asking if the user wishes a balance receipt. At 292 the user response is tested and if a receipt is requested the system 10 goes to 284 and continues as above.

0041If the test at 288 shows that a balance receipt has been printed, or the test at 292 shows the user does not wish a receipt, at 294 the Obtain Account Balance function is complete and system 10 goes to display the main menu (112 in Figure 3a).

0042Figure 3h is a flow chart representation of the operation of system 10 in executing the Set Up System function. At 300 system 10 displays a menu of set up options and waits for input. Then at 302 system 10 tests the input to determine if the user has selected the Maintain Meter List function, and if so at 304 goes to that function. Otherwise, at 286 system 10 tests to determine if the Assign Operator function has been selected, and if so goes to that function at 308. Otherwise, at 310 system 10 tests to determine if the Set Program Parameters function has been selected, and if so at 312 goes to that function. Otherwise system 10 tests at 296 to determine if the Change Supervisor Password function has been selected, and if so, at 316 goes to that function. If no function has been selected at 318 system 10 tests to see if the user wishes to quit, and if not, returns to 300 for further, appropriate input. Otherwise, system 10 goes to display the main memo (112 in Figure 3a).

0043Figure 3i shows a flow chart representation of the operation of system 10 in executing the Maintain Meter List function, which allows the system user to modify the data base of recharge information for the plurality of meters associated with the system. This data base will contain a record for each meter associated with the system, and each record will typically contain: an account number identifying the account against which the recharge amount is to be debited, a unique (for data center 30) meter identification number, a meter name or number (not necessarily unique) by which the meter is identified to the system user, the maximum permitted recharge amount, and a default recharge amount to be used if no amount is entered by the user.

0044At 330 system 10 displays options for meter list maintenance and waits for user input.

0045At 332 system 10 tests to determine if the user has requested a View/Modify Meter function, which allows the user to modify an existing record. If so, at 334 system 10 goes to this function. Otherwise, at 336 system 10 tests to determine if the user has requested a Add Meter function, which allows a user to add a new meter to the data base, and if so goes to this function at 338. Otherwise at 340 system 10 tests to determine if the user has requested a Delete Meter function, which allows a user to delete a meter from the data base. If so system 10 goes to this function at 342. If none of the above functions have been selected, at 346 system 10 tests to determine if the user wishes to quit. If the user does not, system 10 returns to 330 for further, appropriate input. Otherwise system 10 returns to display the system set up menu (300 in Figure 3h).

0046Figure 3j shows a flow chart representation of the operation of system 10 in executing the View/Modify Meter List function. At 350 system 10 displays a list of meters and waits for user input. At 352 the user input is tested to determine if the user wishes to quit, and if so system 10 goes to display the maintain meter menu (330 in Figure 3i). Otherwise, at 356 system 10 test to determine if a meter has been selected, and if not returns to 350 to wait for appropriate input. If a meter is selected, then at 358 system 10 displays the selected meter record and opens the first field and waits for user input. The user may then input data to modify the open field, e.g., change the maximum recharge amount allowed for the selected meter. At 360 system 10 tests to see if the user wishes to cancel any changes which may have been made and if so returns to 350 to wait for appropriate input. Otherwise, at 362 system 10 tests to determine if the last field has been opened, and if not returns to 358 to open the next field for modification. If the last field has been opened then at 364 system 10 saves the selected record as modified and returns to 350 to wait for further input.

0047Figure 3k shows a flowchart representation of the operation of system 10 in executing the Add Meter function. This function substantially parallels the View/Modify Meter List function described above to add a new meter to the existing list. At 370 system 10 displays a list of meters and waits for user input. At 372 system 10 determines if the meter list is full, that is if system 10 is capable of handling additional meters. If so, at 376 an error message is displayed, and at 378 system 10 goes to display the maintain meter list (350 in Figure 3j). Otherwise, at 380 system 10 tests the user input to determine if the user wishes to quit, and if so goes to 378 to return to display the maintain meter list. If the user does not wish to quit at 382 system 10 tests to determine if the user has selected the position in the list where a meter is to be added. If not system 10 returns to 370 to wait for appropriate input. Otherwise, at 384 an empty meter record is displayed and the first field is opened and system 10 waits for user input to complete the record field. Then at 386 system 10 tests to determine if the user wishes to cancel the addition of a new meter and if so returns to 370 to wait for further input. Otherwise, at 387 system 10 tests to determine if the last field has been completed and if not returns to 384 to open the next field and wait for further user input. Once the test at 387 determines that the last field has been completed, then at 388 system 10 saves the new record and returns to 370 to wait for further appropriate input.

0048Figure 31 shows a flow chart of the operation of system 10 in executing the Delete Meter function. At 390 system 10 displays a list of meters and waits for further input. At 392 system 10 test to determine if the meter list is empty and if so, at 394 displays an error message and at 396 goes to display the maintain meter list (330 in Figure 3i). Otherwise, at 398 the user input is tested to determine if the user wishes to quit, and if so system 10 goes to 396. Otherwise, at 400 the user input tests to determine if a meter record has been selected for deletion, and if not system 10 returns to 390 to wait for appropriate input. If a record has been selected at 402 the record is displayed and system 10 waits for user input. Then at 406 the input is tested to see if the user wishes to cancel the deletion and if so system 10 returns to 390 to wait for appropriate input. Then at 408 the input is tested further to see if the user confirms the deletion of the selected record and if not system 10 returns to 390. If the user confirms that deletion then at 410 the selected record is deleted from the meter list and system 10 returns to 490.

0049(Preferable a meter record is selected for a modi- i-fication or deletion by a highlighting it with a cursor in a known conventional manner, and meter records are added immediately before or after a highlighted record.)

0050Returning to Figure 3h, if the Assign Operators function is selected system 10 enters a routine which functions in a manner substantially identical to the Maintain Meter List function described above, the significant difference being that the data base of system operators comprises records associated with each operator, and the records including an identification code field, and a password field. As described above the system user may View/Modify Operators, Add Operators, or Delete Operators. Further description of the Assign Operators function is not believed necessary for an understanding of the subject invention.

0051Figure 3m shows a flow chart representation of the operation of system 10 in executing the Set Program Parameters function. System 10 displays a list of program parameters which the user may select or modify. Preferably the listwill include a flag which indicates whether or not accounting information is to be saved, definition of the communications port to be used, and the remote data center telephone number. In other embodiments of the subject invention program parameters may also identify whether a printed record of recharge transactions and/or balance request is always to be printed, never to be printed, or printed at the user's options definition of an internal or external modem or other parameters.

0052At 420 system 10 displays a list of program parameters and waits for user input. At 422 system 10 determines if the user has elected to quit, and if so at 414 goes to display the set up menu (300 in Figure 3h).

0053Otherwise, at 428 system 10 determines if the user has selected the Save Accounting Information parameter. If the user has selected this parameter at 430 system 10 opens the save accounting information flag field displays a prompt and waits for further input. At 432 system 10 tests the user input to determine if the user has chosen to save accounting information. If the user has, at 436 the flag is set, otherwise at 438 the flag is reset, and system 10 returns to 420 to wait for further input.

0054If the user has not selected the Save Accounting Information parameter, then at 442 system 10 tests to determine if the Communications Port parameter is selected. If it is, at 444 system 10 opens the communications port selection field, displays a prompt and waits for further input. Then at 446 the user input is tested to determine if communications port COM1 or COM2 has been selected, sets COM 1 or COM2 at 448 or 450 respectively, and then returns to 420.

0055If the Communication Port parameter is not selected system 10 tests at 454 to determine if the data center phone number has been selected, and if not returns to 420. If it has then at 456 system 10 opens the field for the Data Center Phone Number parameter and waits for further input, and at 458 it enters the input into the open field, then returns to 420.

0056Figure 3n shows a flow chart representation of the operation of system 10 in executing the Change Supervisor Password function. At 460 system 10 requests the user to input the current supervisor password, and at 462 system 10 test the input to determine if the user wishes to quit, and if so, at 464 goes to display the set up menu (300 in Figure 3h). Otherwise, at 466 the password is tested to determine if it is correct, and if not at 468 an error message is displayed and the system returns to 460 to wait for correct input of the supervisor password. If the current password is correct then at 470 the user is prompted to enter the new password and the system waits for input. Then at 472 the user is prompted to re-enter the new password and the system again waits for input. At 474 the first and second entrys are compared and if they do not match an error message is displayed at 476 and system 10 returns to 470. If the entrys match then at 478 the supervisor password is updated, and at 464 system 10 goes to display the system set up menu.

0057Those skilled in the art will recognize that in the event of a fatal error condition (e.g. failure of communications with data processing center 30) well know, conventional escape, reset or time out functions are preferably provided to prevent system 10 from permanently "locking-up".

0058The above detailed description and the attached drawings have been provided by way of illustration only, and other embodiments of the subject inwention can be devised.