Hardware monitoring of ONT:

• Bits received / Bits send (Traffic monitoring of OLT | Screen 1)
• Ont Status (Show current ONT status (Power Off; Out of Service)  | Screen 2)
• Temperature (Show temperature of ONT)
• RX Power / TX Power (Show signal of ONT | Screen 3) and trigger alarm if signal lower than -29 dBm 
• Version A / Version B (Compare version of ONT | Screen 4) 

It works fine with OLT1408. If you want to use this for OLT1404 or other GPON Zyxel, just change OID in some parametrs.

Version checker works only for version ONT V540ABNA1C0. If version not V540ABNA1C0 zabbix trigger alarm Please check verion.

If you need to change version in trigger move to template ZyXEL OLT1408 ->  Trigger prototypes -> Version mismatch ont-{#SNMPINDEX} {#ONTDESCR} and make a change in "Expression" field to your target version

({ZyXEL OLT1408:ontNumber[ontVersionA.{#SNMPINDEX}].str(V540ABNA1C0)}=0 and {ZyXEL OLT1408:ontNumber[ontVersionB.{#SNMPINDEX}].str(V540ABNA1C0)}=0) and ({ZyXEL OLT1408:ontNumber[ontVersionA.{#SNMPINDEX}].strlen()}>0 or {ZyXEL OLT1408:ontNumber[ontVersionB.{#SNMPINDEX}].strlen()}>0)