New Zealand Gazette – 1994 – No. 114

Page 3402

✨ Technical Standards and Requirements



3402 NEW ZEALAND GAZETTE No. 114

i. signal attenuation or distortion;

ii. potential for ground loops;

iii. reliability;

iv. other matters as appropriate.

F.4.3. Data Communications

F.4.3.1. Message Formats / Protocol

a. The Authority must approve the message formats and protocol used for data communications.

b. The assessment will also extend to the adequacy of documentation which is to be distributed to selected suppliers for interfacing with the system operating the chosen protocol.

c. The Authority will approve a protocol only if it is confident that the devices implementing the protocol will comply fully with the requirements of this document, and any other requirements the Authority may specify from time to time.

F.4.3.2. Data Link

Communications protocols must include the following:

a. Error Control

b. Flow Control

c. Link Control (remote connection).

F.4.3.3. Error Detection

The data communications must make use of Cyclic Redundancy Checks (CRCs); use of only parity or simple checksum byte is not acceptable.

F.4.3.4. Encryption

a. The Authority requires data transmissions to be encrypted where:

i. linked progressive jackpots are operated with a prize value exceeding an amount prescribed by the Authority;

ii. cashless transactions are operated;

iii. a link to a Government facility is provided.

b. The method of encryption must be approved by the Authority.

F.4.3.5. Medium Access Control Methods

The Authority will consider any method of access control, such as:

a. CSMA/CD

b. Control Token

c. Slotted Ring

d. Polling.



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🏭 Communication Requirements Detailed Table of Contents (continued from previous page)

🏭 Trade, Customs & Industry
Communication Requirements, Table of Contents, Operating Environment, Dial-Up, On-line Communications, Hardware, Communications Interfaces, Transmission Medium, Device Connection, Data Communications, Message Formats, Protocol, Data Link, Error Detection, Encryption, Medium Access Control Methods, EGMs