POS Interface / Transaction Verification

Transaction Verification System allow transaction data from cash registers or a bank's automatic teller machine to be displayed on top of the normal video image. Cash register interface applications are an excellent method for controlling theft and fraud in retail stores and are gaining widespread use in the security industry. With ATM theft and fraud such a predominant concern in our society, there is also a tremendous need for a powerful CCTV system in the banking industry.



The TVS products work the same for both bank and retail applications. Once a transaction is started, data is generated and sent to the TVS from either the cash register or the ATM. The TVS overlays this data on top of the normal camera picture and also sends a signal that activates the recorder. This provides two benefits. First, the TVS links the data with the picture. On the monitor screen you will see not only the cashier and the product being sold, but also the price charged by the clerk for that product. This allows visual comparison of the physical items being rung into the register and the actual register data of the transaction overlaid on the video picture.

With all these elements recorded on tape, a store owner can review the scene and, with one view, verify the legitimacy of the check out. But perhaps the most significant benefit of the TVS its ability to trigger VCR recording so that only relevant event information is captured on video. For instance, a grocery store owner, concerned about losses, may not want to watch every transaction but only those with a sales amount over $100. With the powerful programming capabilities of the TVS Exception Report, it is possible to program the TVS to alarm (or trigger recording) for what the store owner considers exceptional events, such as any transaction over $100. The owner can program the TVS to alarm when an Exception falls either within or outside of a certain range. The parameters of a range can be Greater Than, Less Than, Equal to, Within the range of two numbers, or Outside of that range, creating VCR recording that is triggered by only certain high risk exceptional, or questionable events, known as Exception Reporting.



Exception Reporting


The TVS can electronically watch for a wide variety of questionable transactions, or Exceptions, such as sweet hearting, substitute scanning, short changing, no rings, short rings, or pilfering, and display an on-screen "Flag" when such transactions take place, or, with the EX Option installed, provide a hard contact closure to trigger an alarming VCR or other alarming devices. This hard contact signal could also turn on the camera watching the offending register.



You may define a numeric range for your exceptions, or you may use tags or words to define very specific exceptions, and you can even do both. An exception can be assigned to the word "Void" or to "All Voids Over $10.00."

The types of exceptions typically monitored by managers, security personnel, or store owners are: no sales, voids, returns, refunds, cancels, and purchases or payouts. Generally these are all negative transactions requiring money to be removed from the register drawer.

No Sales are the most common exception. Some legitimate uses are making change or correcting change mistakes. Still, the No Sale should always be treated as an exceptional transaction. Towards the end of a shift, whether the clerk was performing short rings (ringing up an item for an amount much lower than its actual value), pilfering, or substitue scanning (scanning a tag of lower value than the actual item), they will have to remove the accumulated money before their shift ends. Therefore it is especially important to check for all No Sale transactions within the last hour of a shift.

Voids are used after the customer has left and the same transaction has been voided. The money is still in the register and will have to be removed then or towards the end of the shift.

Returns/Refunds are usually questionable when no exchange is being made and cash is paid out. Items are pulled from inventory and fictitious refunds are given to friends, relatives or the clerks themselves.

Cancels: this is where a transaction is partially rung up. The clerk asks the customer for the money and if the customer does not ask for a receipt and leaves, then the clerk cancels the sale and pockets the money.

Purchases or Payouts: most small businesses pay for miscellaneous expenses from their cash register drawer, but this practice lends itself to abuse by a dishonest clerk. The clerk rings a payout and, conspiring with the vendor, overpays the vendor and later collects, or simply makes the payout for more and keeps the difference. Dishonest employees can generate fake or alter receipts and pocket the money. All Payouts from a register should be scrutinized carefully.





The TVS is typically installed close to the camera, which is focused on the cash register. Two separate cables, one for communication from the cash register and one for the camera signal, will link these devices into the TVS. A separate BNC cable will connect from the TVS to the time-lapse VCR. In some cases, an additional module, or interface, is installed in or near the register for data conversion. This completes all the required wiring for a fully operational system. When the system is powered up, you can begin programming the TVS. Like all other TVS products, the TVS uses a simple and easy to understand programming menu.

How Cash Register Interfacing Works TVS has devoted tremendous engineering efforts to ensure that its TVS products work with virtually all types of cash register systems, and a summary of all compatible cash registers is included in this catalog.

The cash register business is a unique industry. No standards exist and, actually, cash register companies go out of their way to make hardware dissimilar from company to company and, to some extent within a company's own range of products, making older versions or accessories incompatible with newer models.

It is this fundamental fact that can make cash register interfacing a complicated process. One interface box can only connect to a limited number of registers. Converter boxes are sometimes needed to translate from one format to another. Every model register has unique features that can enhance the interface or cause major problems when dealing with loss prevention.

Register Communication The following are brief technical explanations of the most popular types of methods that we can use to communicate to cash registers.



Basic Register Interface System




  • Video out from the camera goes to video in on the TVS. This camera typically watches the general area, including the register, counter, employee and customer.
  • Most low-end registers require the installation of an RS-232 board from TVS or the register vendor. Some registers utilize an RS-232 printer tap, while others with no RS-232 ability must be fitted with an additional interface module which converts the printer data to RS-232 for the TVS.
  • Video out from the TVS goes onto the existing video system.
  • Video out to the monitor.
  • The EX option gives you 2 hard alarm outputs to trigger alarming VCR's, Quad's, or other alarming devices for Exception reporting.