M17_Project
/
M17_spec
mirror of https://github.com/M17-Project/M17_spec.git
1
0
Fork 0
Code Issues Releases Wiki Activity

remove 1600 bps voice mode

pull/177/head
Tom Early 2026-08-09 11:21:16 -07:00
parent 2efccc2cdf
commit 5ebca36158
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
M17_spec.tex
View File

@ -1173,7 +1173,7 @@ Listed from msb to lsb, there are five TYPE subfields:
\subsection{Payload}
The first TYPE subfield is the 4 most significant bits of the first byte and specifies the contents of the 128-bit payload. Four payloads are currently defined: a 3200 bps data-only mode, a 3200 bps \href{http://rowetel.com/codec2.html}{Codec 2}-encoded voice-only mode, a 1600 bps Codec 2-encoded mode that has a parallel 1600 bps data stream, resulting in a voice+data mode and a Packet Mode. Only the voice-only and packet modes modes (0x2 and 0xF) are currently specified. There are applications that are currently using the voice+data mode and simply ignoring the data stream.
The first TYPE subfield is the 4 most significant bits of the first byte and specifies the contents of the 128-bit payload. Three payloads are currently defined: a data mode, a \href{http://rowetel.com/codec2.html}{Codec 2}-encoded voice mode, and a Packet Mode.
\begin{table}[H]
\centering
@ -1184,10 +1184,9 @@ The first TYPE subfield is the 4 most significant bits of the first byte and spe
Value & Content \\
\hline
\texttt{0x0} & Reserved for Version detection \\
\texttt{0x1} & Data Only \\
\texttt{0x2} & 3200 bps Codec2 Voice Only \\
\texttt{0x3} & 1600 bps Codec2 Voice \textit{and} Data \\
\texttt{0x4..0xE} & Reserved for future expansion \\
\texttt{0x1} & Data \\
\texttt{0x2} & Codec2 Voice \\
\texttt{0x3..0xE} & Reserved for future expansion \\
\texttt{0xF} & Packet data \\
\hline[2px]
\end{tblr}