Calls dropped when transferring

[ScottClark]

We have a Fortinet 570, along with a number of Fortinet D71s. On occasion, when transferring a call, the call will drop, seemingly at random. There does not seem to be a pattern to this, but sometimes another D71 will already be engaged in a call when this occurs. Also, sometimes the transfer key (for a staff member) will be non-responsive, and the call will drop upon tapping the key. What are some possible explanations for this?

I can provide more details if needed. 

[Anthony_E]

Good afternoon,

Sorry for the late answer.

I just sent your question to our IT team, which will be able to provide an answer.

I will share it you once I get it.

Regards,

[Anthony_E]

Hello,

Our IT team cannot help as they do not manage your Network and propose you to open a ticket at: https://support.fortinet.com/welcome/

They will be able to provide you the solution.

Regards,