GB/T 18240.1-2003 in English

Standard Evolution and Core Changes

This standard replaces GB/T18240-2000 "General Specification for Electronic Cash Registers". The main changes include: enhancement of tax control function modules, upgrade of tax control IC card security mechanism, and extension of data storage period to 5 years. After being converted to a recommended standard, the integrity of the original technical requirements is still retained.

Analysis of key technical requirements

Tax control function implementation mechanism

Through the three-level authentication system of tax control card, user card and tax management card:

1. Tax control card: Generate tax control code and digital signature, each invoice corresponds to a unique 20-digit anti-counterfeiting code
2. User card: Data declaration channel, supports batch transmission of 300 rolls of invoice records
3. Lock strategy: Automatically disable the invoicing function if the limit is exceeded/the declaration is overdue

Key test indicators and implementation points

Typical application scenarios

Chain supermarket solution: Multiple tax control cash registers are centrally declared through user cards, and the system automatically summarizes the stores:

1. Daily transaction data classification statistics (according to 17% VAT/6% service tax, etc.)
2. Abnormal invoice tracking (the original invoice number record must be retained for returned invoices)
3. Dual backup verification of tax control memory

Standard implementation suggestions

Manufacturers need to pay attention to the following:

• Lead seal management: Physical protection of key components must comply with clause 4.2.4
• Chinese character processing: At least support GB2312 font library, print font ≥ size 5
• Reliability verification: MTBF ≥ 5000 hours (GB/T5080.7 solution)