Item, Trigger and Action for TCP Port

[javierin79]

Hi,

I'm starting to understand how zabbix works.

So far I've created an item for a TeamSpeak server i'm running.

Name TeamSpeak key "tcp,14534"

But at the time of creating a trigger for it before the send mail action, at the create new trigger screen

Name	 
Expression	 
The trigger depends on	No dependences defined
New dependency	  
Severity	
Comments	 
URL	 
Disabled

I don't know what to put...

Any clue?

Thanks in advance