> ## Documentation Index
> Fetch the complete documentation index at: https://docs.solidyne.ar/llms.txt
> Use this file to discover all available pages before exploring further.

# Using Bluetooth

> Mobile Bluetooth operation

## Key Concepts

In operation, it's essential to distinguish three different actions:

* **Enable/disable Bluetooth on mobile**\
  Turn Bluetooth on or off on the phone. Does not involve pairing or connecting to a device.
* **Pair/Link the mobile with a device**\
  Also called *pairing*. The mobile **registers** an external device (headphones, car hands-free, or MX2200's Bluetooth channel). This is done **only once** per device.\
  A device can be **unpaired**, meaning deleted from the list of Bluetooth devices linked to the mobile. To use it again, you'll need to pair it again.
* **Connect/Disconnect a previously paired device**\
  The mobile **connects** to one of the previously paired devices. This is different from pairing. With Bluetooth enabled on the mobile, connection/disconnection is done from the **list of paired devices**.

### BLT LED States

The **BLT** button illuminates in amber with different flashing patterns according to the Bluetooth status:

|  Mode | Status                                      | LED Indication                  | Meaning                                                                                                                                   |
| :---: | ------------------------------------------- | ------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| **A** | **Mobile connected**                        | Brief ON (1 s) + long OFF (2 s) | Mobile is connected to MX2200, **no active call**                                                                                         |
| **B** | **Mobile not connected / Call in progress** | Slow ON (2 s) + short OFF (1 s) | - Bluetooth on but **no mobile connected**<br />- Or mobile has an **active call**<br />- When a mobile connects, status changes to **A** |
| **C** | ***Search mode (Pairing)***                 | Fast flashing                   | Allows phone to find and pair with **MX2200**                                                                                             |
| **D** | **Incoming call**                           | Steady ON                       | Indicates an incoming call                                                                                                                |
|   —   | **Off**                                     | No illumination                 | Bluetooth off                                                                                                                             |

### Operation Notes

* **Mode A** confirms the mobile is properly linked, ready to use as audio source or backup link.
* **Mode B** can indicate two situations: no mobile connected yet, or an active call.
* **Mode C** should only be used when **pairing** a new phone.
* **Mode D** acts as clear notification of incoming call, with steady illumination.

<Note>
  Never confuse **pairing (mode C)** with **connecting/disconnecting (mode A/B)**. Pairing is done only once per phone, while connection/disconnection happens each time of use.
</Note>

The image shows an example of an Android mobile with a call. Switching between Bluetooth and Speaker allows transferring the call to MX2200 (Bluetooth) or speaking from the phone (Speaker).

<img src="https://mintcdn.com/solidyne/Ohl2Yz3LdlfURVtJ/images/android_bluetooth.jpg?fit=max&auto=format&n=Ohl2Yz3LdlfURVtJ&q=85&s=5669f04e6190b5d744041049d780023b" alt="Android Bluetooth Jp" title="Android Bluetooth Jp" style={{ width:"33%" }} className="mx-auto" width="506" height="900" data-path="images/android_bluetooth.jpg" />

<Note>
  Interface may vary by system/version: some Android show a **Headset/Speaker** button, others a menu with **options**. Check your phone's manual.
</Note>

***

## Pairing mobile with MX2200

<Steps>
  <Step title="Prepare the console">
    Ensure Bluetooth is **off** on the MX2200.\
    If the **BLT** button flashes amber with **slow** intermittence (≈1 flash every 2 s), Bluetooth is **on**. Press and hold **BLT** until the LED turns completely **off**.
  </Step>

  <Step title="Enter pairing mode">
    With Bluetooth off, press and hold **BLT** \~**8 s**.\
    You'll first see **slow** flashes (mode B) then **fast** flashing (mode C). **Release** the button when it changes to fast flashing: console enters **pairing** mode and is ready to be discovered.
  </Step>

  <Step title="Search from mobile">
    On the phone, **enable Bluetooth** and search for **new devices** (procedure varies by make/model).
  </Step>

  <Step title="Select the device">
    The device will appear as **Solidyne BTM641**. Select it to **pair** and then to **connect** if the system asks twice.
  </Step>

  <Step title="Confirmation and name">
    After pairing, **BLT** remains with **slow** flash (Bluetooth **active**).\
    On mobile you can **rename** "Solidyne BTM641" from device settings if desired.
  </Step>

  <Step title="Multiple mobiles and distance">
    You can **pair multiple** phones with MX2200, but **only one** can be **connected** at a time.\
    Typical range: **up to 3 m**. Keep mobile **nearby**, but **never** placed directly on the MX2200.
  </Step>
</Steps>

***

## Re-connecting a previously paired mobile

The mobile can **disconnect** from MX2200 in various situations. The following table shows what happens and how to reconnect:

| Situation                                     | What happens to the call                                              | How to return to MX2200                                                                               |
| --------------------------------------------- | --------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- |
| **Bluetooth turned off on mobile**            | Call usually **transfers to phone** (behavior may vary by make/model) | **Turn Bluetooth back on**; reconnection may be **automatic** or select **Solidyne BTM641** from list |
| **Mobile disconnected from Bluetooth device** | Call exits Bluetooth and goes to **phone**                            | On mobile **reconnect to Bluetooth** Solidyne BTM641 to return it to console                          |
| **"Speaker" activated on mobile**             | Call exits "hands-free" mode (Bluetooth) and goes to **phone**        | Switch to **"Headset/Bluetooth"** on mobile to return to console                                      |
| **Bluetooth channel turned off on MX2200**    | Bluetooth link cuts off. Call usually transfers to phone.             | **Turn on BLT** and **reconnect** from mobile                                                         |

<Note>
  Reconnection **won't be possible** if the **same** Bluetooth channel on MX2200 was paired with **another phone** and that second phone is **currently connected**.
</Note>

***

## Volume Adjustment

<Warning>
  On the **mobile**, set **Bluetooth volume to maximum** to ensure good reception and best **signal-to-noise ratio**.
</Warning>

<Info>
  Make the adjustment **during a Bluetooth call**. If you change volume **without** an active call, it modifies the phone's **internal speaker** volume and **not** Bluetooth volume.
</Info>

* Bluetooth level remains **stored in the mobile**.
* If changing phones, repeat adjustment to set Bluetooth volume to **maximum**.

***

## Turning off Bluetooth on console

To **turn off** Bluetooth on MX2200, press and hold **BLT** until LED **turns off**.\
If operating on battery and not using Bluetooth, keep it **off** to **save power**.

***

## Broadcasting via Bluetooth

<Steps>
  <Step title="Console preparation">
    On **CELL PHONE**, keep **LEVEL control closed** and **CUE/PGM in CUE** (released).
  </Step>

  <Step title="Turn on Bluetooth on console">
    Press and hold **BLT** \~**5 s** until it remains **lit** with **slow** flash (Bluetooth active).
  </Step>

  <Step title="Connect mobile">
    Enable Bluetooth on **mobile**. If already paired, link restores in **few seconds**.
  </Step>
</Steps>

<Warning>
  Before **transferring** the call to console, verify **CUE/PGM is in CUE** to prevent call from going **on air** at transfer moment.
</Warning>

<Tabs>
  <Tab title="Incoming call (Bluetooth)">
    <Steps>
      <Step title="Answer if Bluetooth is off">
        If Bluetooth is **off on mobile**, answer call from **phone** then **enable Bluetooth** to transfer to console.
      </Step>

      <Step title="Answer if Bluetooth is active">
        If Bluetooth is **active**, you can answer directly from console with a **short press on BLT**.\
        In this condition conversation happens **only through console**.
      </Step>

      <Step title="Call transfer">
        Once transferred to console, **mobile receives PGM signal**.
      </Step>

      <Step title="Private talk">
        Press **TALK** in **CELL Phone** zone and listen on **CUE** through headphones.
      </Step>

      <Step title="Put on PGM">
        Switch **CUE/PGM to PGM** and **adjust level** to send call to program.
      </Step>

      <Step title="End call">
        End with a **short press on BLT** or by hanging up from **mobile**.
      </Step>

      <Step title="Return to phone">
        To return call to mobile, switch mode from **"Headset/Bluetooth"** to **"Speaker"** on phone.
      </Step>
    </Steps>
  </Tab>

  <Tab title="Call from mobile">
    <Steps>
      <Step title="Switch to speaker">
        On **mobile**, set audio to **"Speaker"** to talk from phone.
      </Step>

      <Step title="Dial call">
        Make the **call** and establish connection from mobile.
      </Step>

      <Step title="Transfer to console">
        Switch audio mode on mobile to **"Headset/Bluetooth"** to transfer call to console.
      </Step>

      <Step title="Confirm not on PGM">
        Before transferring, ensure console is in **CUE**.\
        If in **PGM**, call could accidentally go on air.
      </Step>

      <Step title="Put on air">
        Switch **CUE/PGM to PGM** and **adjust level** to send call to program.
      </Step>

      <Step title="End call">
        End with a **short press on BLT** or by hanging up from **mobile**.
      </Step>
    </Steps>
  </Tab>
</Tabs>