A method comprises submitting a content message to an alerting engine from a health monitor, said content message being configured to cause said alerting engine to send an alert message to a communications device. The method may further comprise determining, using said health monitor, an expected alert message according to said submitted content; receiving, at said health monitor, an alert message forwarded from said communications device; comparing said received alert message with said expected alert message; and selectively sending an alarm message based on said determination.