Updated Features (markdown)

Features.md

@@ -5,7 +5,8 @@
 - **BLE connectivity**, scan for devices, select default device, connect to default device on startup, must be explicitly enabled from settings, requires location permission for scan, modem must conform to [BLE KISS API](https://github.com/hessu/aprs-specs/blob/master/BLE-KISS-API.md) (BLE service, RX/TX characteristics UUID), no authentication
 - **TCP/IP connectivity** on startup, application can connect to TCP/IP based modem and operate through the network, for example, with [Direwolf](https://github.com/wb2osz/direwolf) application and your existing analog transceiver
 - **Voice Codec2 mode selection**, which allows you to select various Codec2 modes from 450 up to 3200 bps on the fly, sender and receiver should agree on the codec mode and use the same codec mode on both ends as Codec2 mode negotiation between clients is not implemented at the moment
-- **Codec2 loopback mode**, which records and plays your recorded voice back to test and evaluate different Codec2 modes and speech quality, could be enabled or disabled from Preferences, this mode is also activated if no USB/Bluetooth/TCPIP connection was made
+- **Sound modem**, use phone microphone/speaker to send and receive data using AFSK1200 or FSK 300 (for HF packet)
+- **Loopback transport**, which records and plays your recorded voice back to test and evaluate different Codec2 modes and speech quality, could be enabled or disabled from Preferences, this mode is also activated if no USB/Bluetooth/TCPIP connection was made
 - **Voice level VU indicator**, display audio level on transmit or receive
 - **S-meter**, displayed only when KISS extensions are enabled and modem is able to send signal level information
 - **Parrot mode**, received voice will be digirepated in addition to playback through the speaker
@@ -25,13 +26,13 @@
     - Set Codec2 mode/speed from 450 up to 3200 bps
     - Set maximum super frame size in bytes
       - Multiple Codec2 frames are aggregated into one super frame of size not larger than this value
-    - Enable/disable echo/loopback test mode
     - Enable/disable RX/TX recorder
   - **TNC parameters**
+    - Select TNC transport (Loopback/USB/Bluetooth/BLE/SoundModem/TCPIP)
     - Change USB serial port settings (baud rate, bits, parity, DTR, RTS)
     - Set default Bluetooth device for automatic connectivity on startup
-    - Enable KISS over TCP/IP, when enabled USB and Bluetooth connectivity is disabled
-      - Set TCP/IP parameters: IP address, port number, number of re-reconnect retries and delay between connect re-tries
+    - Set TCP/IP parameters: IP address, port number, number of re-reconnect retries and delay between connect re-tries
+    - Set sound modem parameters (speed, modulation, preamble length)
   - **KISS**
     - Enable/Disable KISS, when disabled raw Codec2 audio frames will be transmitted
     - Set basic KISS parmaters (P persistence, Slot Time, TX delay, TX tail)