RouterOS can receive SMS. This script forwards SMS as notification.
A broadband interface with SMS support is required.
Just install the script:
... and add a scheduler to run it periodically:
/ system scheduler add interval=2m name=sms-forward on-event="/ system script run sms-forward;" start-time=startup;
Notification settings are required for e-mail and telegram. Also you have to enable receiving of SMS:
/ tool sms set receive-enabled=yes;