Count triggers in low level discovery

[AkvenJan]

I have LLD for users on GPON device
I check their status via LLD and fire two triggers for LOS and dying-gasp
for example
user 1 status - ok
user 2 status - LOS
user 3 status - dying-gasp
and so on (every device being discovered for number of connected users)

And I need to somehow create a trigger with higher severity to be created only if there are more than X users with dying-gasp or LOSI on this device

If there is any way to do it with tags maybe? I couldn't find any good examples in google

[AkvenJan]

maybe override:
https://www.zabbix.com/documentation...overy#override

Maybe some examples? Zabbix official documentary is absolutely unuseful in most cases. I don't see anything useful in overrides documentation.
What I need is too count how many triggers were created in the last N minutes with the same reason (with the same tag). For example, 10 incidents were created with the reason Loss of Signal in the last 5 minutes. So I need a new summary incident "Cable has been cut" or something.
But if only 2 Loss of Signal incidents were created - no new incidents are needed.

Device doesn't have OID for client states summary (26 or, 52 dying-gasp, 13 loss and so on). I can only check status of each client id, and whole clients discovery thing is made by LLD discovery.

And Zabbix can't do anything arithmetical with LLD metrics like client1.value+client2.value+...+clientN.value (in this case I could javascript value output to LOSS = 1).

[AkvenJan]

I need to know when there is more than 10 people with loss of signal
How can I do that? All I have is a state of modem found by LLD