Updated Setting up modem client under Linux (markdown)

Setting-up-modem-client-under-Linux.md

@@ -1,18 +1,19 @@
 It is possible to use modem **in client mode** with other generic Linux AX25/APRS tools on PC or Raspberry, such as [Xastir](https://xastir.org/index.php/Main_Page), use next procedure to set it up:
 - AX25 howto: http://tldp.org/HOWTO/AX25-HOWTO/
 - Install required tools: ```sudo apt-get install ax25-tools ax25-apps xastir bluez bluez-tools```
-- Run bluetoothctl and pair with the modem: 
-  ```
-  # bluetoothctl
-  [bluetooth]# agent on
-  [bluetooth]# default-agent
-  [NEW] Device 01:02:03:04:05:06 loraprs
-  [bluetooth]# pair 01:02:03:04:05:06
-  Attempting to pair with 01:02:03:04:05:06
-  Pairing successful
-  [bluetooth]# exit
-  ```
-- Run `rfcomm` to setup serial over Bluetooth at `/dev/rfcomm0`: `sudo rfcomm bind 0 01:02:03:04:05:06`
+- If you are using Bluetooth mode:
+  - Run bluetoothctl and pair with the modem: 
+    ```
+    # bluetoothctl
+    [bluetooth]# agent on
+    [bluetooth]# default-agent
+    [NEW] Device 01:02:03:04:05:06 loraprs
+    [bluetooth]# pair 01:02:03:04:05:06
+    Attempting to pair with 01:02:03:04:05:06
+    Pairing successful
+    [bluetooth]# exit
+    ```
+  - Run `rfcomm` to setup serial over Bluetooth at `/dev/rfcomm0`: `sudo rfcomm bind 0 01:02:03:04:05:06`
 - At this stage you can already start using `xastir` or any other application, which can operate over KISS Serial TNC
 - You can setup `AX25` network interface with `sudo kissattach /dev/rfcomm0 ax25` command, but previously need to update `/etc/ax25/axports` with new line as `ax25    CALLSIGN-10        9600    255     1       comment`, you can also specify IP address if there is a need to run TCP/IP over AX25
 - Run `axlisten` to capture incoming and outgoing traffic as `sudo axlisten -a`