Solved Revert back v16 to v15.5 on Debian 9

[jorgemichel]

Is it possible to go back from version 16 to 15 on 3cx phone

 

[Saqqara]

Do you mean you want to go back to version 15.5 ?

You have a few issues to overcome

1. Your license key will not work , as it has been upgraded. I believe ver 15.5 keys are not available.
2. Only possible if you have a ver 15.5 backup , backup created with 16.0 will not work.
3. If you use any of the mobile apps, these will not be supported.

Why do you want to go back ?

 

[jorgemichel]

@Saqqara my management console is not opening

 

[Rhys Haskell]

@Saqqara my management console is not opening

Have you rebooted the system/server?
Is this running on Linux or windows?
Is the management console service running?

 

[jorgemichel]

@Saqqara

I've done the reboot
the OS is debian
The Management Console Service
But when I restart the Management Console service I get this error:

Unit 3CX.service could not be found.
Unit PhoneSystem.service could not be found.
Unit Management.service could not be found.
Unit Console.service could not be found.

 

[Saqqara]

Did version 16 work ?,
Did it failed after the upgrade. ?
How did you do the upgrade, if you where ?

Do you have a backup of ver 15.5 or 16 ? If so you could try installing 3CX - https://www.3cx.com/docs/manual/installing-debian-linux-pbx/

I am not familiar with Debian , hopefully someone else will be able to help you

 

[YiannisH_3CX]

Did you upgrade to V16 from a previous version? Did V16 worked after the update? What Debian version are you running?
It looks like you have a corrupted installation so if you have a backup the fastest way to recover is to re-install the PBX. Make sure you are running Debian 9 and that the system has been uninstalled correctly.
You could also re-install the OS from the 3CX iso. https://www.3cx.com/docs/manual/installing-debian-linux-pbx/

 

[jorgemichel]

Thank you very much for helping the problem solved if with the new installation and backup restoration.