A 28-year-old Donegal man who admitted making grossly offensive phone calls to five female gardaí and threatening to kill one of them has been sentenced to three years and nine months in prison.

Mark Fair, of Ballinahone, Fahan, made the phone calls to gardaí Una Cunningham, Lorraine Crawford, Carol Doherty, Elaine Moyles and Grainne McLoone at Buncrana Garda station from Australia in January 2015.

Sentencing him at Letterkenny Circuit Court, Judge John Aylmer said the most serious offences he pleaded guilty to are those of threatening to kill Garda Moyles and her husband and threatening to damage their property.

He said the phone calls to the gardaí were particularly menacing in nature, they were very violent and sexual in character and made by a man with a significant criminal record.

The court had heard that Fair had 36 previous convictions.

His barrister Peter Nolan had told the court that Fair was "on the run" at the time he made the calls, having breached bail conditions in relation to other charges.

He said his client was a fantasist and had made the calls for the amusement of his friends who were from Buncrana and in the room in Australia when he called the station.

Fair had also pleaded guilty to 11 charges of fraud committed last year, mostly over a three-month period.

Gardaí gave evidence that in some cases Fair responded to adverts placed on classifieds site DoneDeal by men looking for tractor parts and in other instances he placed ads offering Champions League tickets and an iPhone for sale.

In all cases, the victims transferred sums of money to Fair either online to a bank account or via a 3Money voucher, but none of the men received the goods they had paid for.

Fair had claimed in court on Wednesday that he had repaid two of his victims, but gardaí contacted the men in question and gave evidence that they had not been reimbursed.

Judge Aylmer said the individual amounts involved in each offence were relatively small.

However, the judge said that looked at cumulatively it amounted to a significant campaign of fraud, which resulted in a significant gain of over €3,000 to Fair.

Judge Aylmer sentenced Fair to three years and nine months for threatening to kill and cause damage; three years on each charge of making menacing phone calls and two years on each charge of making gain by deception.

All the sentences are to run concurrently with credit given for seven months already spent in custody.