A Louisiana man has been sent to prison for six months for sending a malicious e-mail to Microsoft MSN TV customers.
The e-mails the convicted man sent out contained an attachment that the mails claimed would re-set their TV’s display colours when opened.
Instead, the attachment contained script that re-programmed customers’ TV boxes to dial 911 instead of a local phone number to access Microsoft’s servers.
The ruse led to emergency services unexpectedly turning up at MSN TV customers' homes.
The man had pleaded guilty to intentionally causing damage to computers and causing a threat to public safety.
He will also have to complete six months of home detention and pay £15,000 compensation to Microsoft.
MSN TV service allows subscribers to connect to the internet via their television sets.