Enable the GSM LTE Modem script under Zabbix
Create for Zabbix a special SMS script called didactum_sms_send
GSM LTE Modem script for Zabbix NMS
The input parameters of the script $ {1}, $ {2}, $ {3} in Zabbix are bound to the address of the recipient, the subject and the text of the message.

The script file should be located in zabbix_server.conf according to the AlertScriptsPath parameter (e.g. /usr/lib/zabbix/alertscripts) and should have execution privileges for the respective Zabbix user (or in the configuration file).

Then add a new notification type for the user:
Define the user rights for SMS Script
Then please set up as follows:
Definition of Zabbix SMS Notifications
Once the new notification type has been added and configured to the user, you must add the action to be performed when an event occurs to the configuration → Actions.
SMS action on occurrence of an event
You must specify the name and conditions (event filter) in the Action settings:
Trigger action for SMS alerts under Zabbix
In the “Recovery operations” tab, you need to specify the fields for the subject, message content, etc. This is similar to operations sent by SMS when the incident is fixed.

Once you have created the action, you must ensure that the action can be performed on Zabbix.

Further information can be found on the Zabbix homepage.

3G / 4G LTE Modem Plugin for Zabbix

Zabbix is a powerful  open source monitoring solution for network monitoring of enterprises and public authorities. The Didactum monitoring units equipped with a GSM / LTE modem can be used by the Zabbix network monitoring software. To access the GSM / LTE modem with Zabbix, you need to create a special script.