Peter Lewis Sheather, 41, has pleaded guilty to sending lewd images and text messages to women in Sydney where he has been working as a pool cleaner.

Sheather was front-page news in The Daily Advertiser on October 31, 2002, when he was jailed for 18 months after pleading guilty to almost 100 counts of menacing women.

Wagga Local Court was told some victims - one as young as 16 years old - suffered nightmares following Sheather's intimidating telephone calls.

A psychiatric report tendered to the court suggested Sheather had a compulsive sexual disorder which required ongoing treatment.

The sentence in Wagga came less than seven months after he was released from prison after serving a jail term for similar offences committed in 2001.

Police facts tendered to the Wagga court said Sheather had made thousands of calls from a pre-paid mobile telephone over a six-week period leading up to his arrest in September, 2012.

Police also found newspaper clippings and hand-written notes with personal details of women, including their addresses and telephone numbers, during a search of Sheather's Fernleigh Road house.

Police said during his calls, Sheather would use fear to keep victims on the line and ask sexually explicit questions.

These latest Sydney offences largely involved Sheather using an iPhone 5 obtained under a false name to send vile messages to eight women who were customers of two pool maintenance businesses.

Sheather worked for both companies and obtained the personal details of his victims through his work.

One of the women was also sent a 15-second-long video of a man masturbating.

In a number of messages, Sheather told the women he wanted to have sex with them.

Using the false name of Rickie Smith, Sheather also sent a pornographic video message to a woman he met on an internet dating site.

Sheather has pleaded guilty to nine counts of using a carriage service to menace, harass or offend.

Police alleged he committed the offences in March and April.

Deputy chief magistrate Jane Culver took Sheather's guilty pleas in the Downing Centre Local Court on June 25.

She ordered a psychological report and a pre-sentence report on Sheather and granted him continuing bail until sentencing on August 14.

In 2002, Sheather tried to avoid a conviction by asking for his charges to be dismissed under Section 32 of the Mental Health (Forensic Provisions) Act, but the application was rejected by magistrate Phil Moon.

Mr Moon said he had no doubt Sheather's victims would have been terrified by his actions.