Protocol scope and method
This framing helper does not reassemble packet captures or infer missing bytes. It searches for complete 0x7e start/end delimiters.
frame = bytes from one 7e delimiter through the next 7e delimiter.
Diagnostic scenario
Paste a redacted byte stream after TCP segment reassembly, not isolated packet payloads with gaps. Extract candidate 0x7e-delimited frames, then validate every candidate with unescaping, body length and BCC before passing it to a message decoder.
How to interpret the result
A delimiter pair is only a candidate boundary. Capture loss, retransmissions and incorrectly retained escaped bytes can create false or duplicate frames. Leftover bytes may represent an incomplete trailing frame and should be carried into the next stream chunk.
Input reference
- Concatenated TCP hex
- Example default: Sample input included
Common mistakes
- Using an unredacted production capture with vehicle, credential or network identifiers.
- Splitting separate TCP packets without sequence-aware reassembly.
- Treating a successfully parsed sample as standards compliance or interoperability proof.
Before using the result
- Confirm the protocol edition, transport framing and vendor profile before interpreting fields.
- Run length and BCC validation on every extracted candidate.
- Keep a redacted known-good and known-bad sample as a regression pair.
Questions to check during diagnosis
Does the JT/T 808 TCP Frame Splitter 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.