MG6250 serial encrypted?

## Alarm system
MG6250 v1.70

## Environment
Docker on RPi

### Git branch
master

## Question
Panel type and firmware versions are correctly detected, but then PAI restarts.
Is it possible that the serial channel is encrypted with this panel / firmware version, just like EVO192 v7.70?

## Logs (if required)
```
pai  | 2024-09-05 00:45:54,955 - INFO     - PAI - Starting Paradox Alarm Interface 3.5.0
pai  | 2024-09-05 00:45:54,956 - INFO     - PAI - Config loaded from /etc/pai/pai.conf
pai  | 2024-09-05 00:45:54,956 - INFO     - PAI - Console Log level set to 20
pai  | 2024-09-05 00:45:54,964 - INFO     - PAI.paradox.interfaces.ip_interface.interface - Starting IPInterface Interface
pai  | 2024-09-05 00:45:54,966 - INFO     - PAI - Starting...
pai  | 2024-09-05 00:45:54,967 - INFO     - PAI.paradox.paradox - Connecting to interface
pai  | 2024-09-05 00:45:54,968 - INFO     - PAI.paradox.paradox - Using Serial Connection
pai  | 2024-09-05 00:45:54,982 - INFO     - PAI.paradox.connections.serial_connection - Connecting to serial port /dev/ttyUSB0
pai  | 2024-09-05 00:45:54,987 - INFO     - PAI.paradox.connections.serial_connection - Serial port open
pai  | 2024-09-05 00:45:54,989 - INFO     - PAI.paradox.paradox - Connecting to Panel
pai  | 2024-09-05 00:45:54,992 - INFO     - PAI.paradox.interfaces.ip_interface.interface - IP Interface: serving on ('0.0.0.0', 10000)
pai  | 2024-09-05 00:45:54,993 - INFO     - PAI.paradox.interfaces.ip_interface.interface - IP Interface started
pai  | 2024-09-05 00:45:55,014 - INFO     - PAI.paradox.paradox - Panel Identified MG6250 version 1.70 build 0
pai  | 2024-09-05 00:45:55,015 - INFO     - PAI.paradox.paradox - Initiating panel connection
pai  | 2024-09-05 00:46:00,029 - ERROR    - PAI.paradox.paradox - Timeout while connecting to panel. Is an other connection active?
pai  | 2024-09-05 00:46:00,031 - ERROR    - PAI - Unable to connect to alarm
pai  | 2024-09-05 00:46:03,037 - INFO     - PAI - Starting...
pai  | 2024-09-05 00:46:03,038 - INFO     - PAI.paradox.paradox - Disconnecting from the Alarm Panel
pai  | 2024-09-05 00:46:03,038 - INFO     - PAI.paradox.paradox - Clean Session
pai  | 2024-09-05 00:46:03,039 - INFO     - PAI.paradox.paradox - Cleaning previous session. Closing connection
pai  | 2024-09-05 00:46:03,045 - ERROR    - PAI.paradox.connections.protocols - Connection was closed: None
pai  | 2024-09-05 00:46:03,046 - ERROR    - PAI.paradox.connections.serial_connection - Connection to panel was lost
pai  | 2024-09-05 00:46:03,150 - INFO     - PAI.paradox.paradox - Disconnected from the Alarm Panel
pai  | 2024-09-05 00:46:03,151 - INFO     - PAI.paradox.paradox - Connecting to interface
pai  | 2024-09-05 00:46:03,151 - INFO     - PAI.paradox.connections.serial_connection - Connecting to serial port /dev/ttyUSB0
pai  | 2024-09-05 00:46:03,158 - INFO     - PAI.paradox.connections.serial_connection - Serial port open
pai  | 2024-09-05 00:46:03,159 - INFO     - PAI.paradox.paradox - Connecting to Panel
pai  | 2024-09-05 00:46:03,183 - INFO     - PAI.paradox.paradox - Panel Identified MG6250 version 1.70 build 0
pai  | 2024-09-05 00:46:03,183 - INFO     - PAI.paradox.paradox - Initiating panel connection
pai  | 2024-09-05 00:46:08,201 - ERROR    - PAI.paradox.paradox - Timeout while connecting to panel. Is an other connection active?
pai  | 2024-09-05 00:46:08,202 - ERROR    - PAI - Unable to connect to alarm
pai  | 2024-09-05 00:46:08,204 - INFO     - PAI - Starting...
...
```