(Grav GitSync) Automatic Commit from kc1awv

pages/02.part-1/05.application-layer/docs.md

@@ -5,6 +5,7 @@ taxonomy:
         - docs
 media_order: 'LFSR_8.svg,LFSR_16.svg,LFSR_24.svg'
 ---
+
 ### M17 Amateur Radio Voice Application
 
 This section defines the application layer parameters for an audio stream containing low bit rate speech encoded using the open source [Codec 2](http://rowetel.com/codec2.html) codec.  It is intended to be used over the air by amateur radio operators worldwide.  Implementation details for M17 clients, repeaters, and gateways ensure that an M17 Amateur Radio Voice Application is legal under all licensing regimes.
@@ -68,7 +69,10 @@ Bits   | Meaning
 0      | Packet/Stream indicator
 <nbsp> | 1 = Stream Mode
 1..2   | Data type indicator
+<nbsp> | $00_2$ = Reserved
+<nbsp> | $01_2$ = Data
 <nbsp> | $10_2$ = Voice only (3200 bps)
+<nbsp> | $11_2$ = Voice (1600 bps) + Data
 3..4   | Encryption type
 <nbsp> | $00_2$ = None 
 <nbsp> | $01_2$ = Scrambling
@@ -79,7 +83,9 @@ Bits   | Meaning
 
 This application requires Stream Mode.
 
-The Voice only Data type indicator specifies voice data encoded at 3200 bps using Codec 2.
+The Voice only data type indicator ($10_2$) specifies voice data encoded at 3200 bps using Codec 2.
+
+The Voice and Data data type indicator ($11_2$) specifies voice data encoded at 1600 bps using Codec 2, the remaining 1600 bps can be used for arbitrary data.
 
 #### Encryption Types