Help with TK915 Call Disconnection

tom4 years ago

I have the TK915 device and every time I call the device it answers me but the device hangs up after 2-3 seconds.
There are a few times he does let me hear and does not hang up
And there are also cases where he sends me false alerts (but it's less important)
I would be happy to help What can be done?
Thanks
Tom