Protocol scope and method
The body-property word controls body length, encryption, subpackaging and whether a protocol-version byte and expanded terminal ID are present.
bodyLength = attributes & 0x03ff; versionFlag = bit 14.
Common questions
Does the JT/T 808 Header Decoder leave my browser?
No application upload is used. Avoid putting sensitive production data in shareable URLs.
Is this a standards compliance test?
No. Confirm the edition and vendor profile with licensed documents and your target platform.
Offline diagnostic aid. Verify fields, version and vendor extensions before production use.