STS Association Wiki

Frequently Asked Questions


What is STS?​

What is a token?

What is a Vending Key?

What is a KMC?

What is a SGC?

When does a company need to have a valid STS license?

How do I become a Member of the STSA?

What are the membership types?

How long is my membership valid for?

How much does it cost to become a member?

What is certification?

Where can I get the STS531-x certification documents?

When can I self certify?

How much is certification?

How long does certification take?

Who can I send my systems to for certification?

​​How often must I certify my product?

Why should I certify my product?

Who can I talk to for technical support?

Where can I purchase the IEC specifications?

What is a companion specification?

​Which edition of a specification must I use?​

​What services does the STS Association offer?

What are the benefits of being a member of the STS Association?

Where can I get a Supply Group Code?

How do I get a vending key?

​What is a 4 digit manufacturer code?

​What is a meter number?

How do I know if the payment meter or vending system I want to purchase is STS compliant?

Where can I see if a manufacturer has STS compliant meters of vending systems?

What is a security module?

How do I order a security module?
​Where can I get help on designing an STS compliant meter or vending system?

What i​s a keychange?

​What is a TID?

What is​​ TID Rollover​?

What ​is a KEN (Key Expiry Number?

What is a KRN (K​ey Revision Number)?

What is a Keyload File (KLF)?

​What is a manufacturer code and how do I get one?

​​​What are encryption tables?

What are EA and DKGA?

​How many countries use STS?

What is the installed base of STS meters?

What is interoperability?

What is an open standard?

​What must I do to design an STS meter or vending system?

​Are there other open standards for prepayment?

What utility types does the STS support?

Does a utility have to be a member of the STS Association?

​When can my product display the STS logo?

​Does the STS Association do type testing?

How much should I pay for a vending system or payment meter?

Will a payment meter from another manufacturer work with my vending system?

Where can I get a list of STS compliant payment meters or vending systems?

Where can I get a list of STS members?

​Has the STS system ever been compromised?