Murder accused paralympian Oscar Pistorius made his first call of the morning on which he shot his girlfriend Reeva Steenkamp shortly after 3am, the High Court in Pretoria heard on Tuesday.

Pistorius's first voice call in the early morning of February 14, 2013 was at 3.19am to a number ending in 2251, which was saved on Pistorius's phone as "Johan Silver Woods", police captain Francois Moller said during Pistorius's murder trial.

Johan Stander is the head of security at the Silver Woods estate, where Pistorius shot and killed Steenkamp through the locked door of his toilet, apparently thinking she was an intruder.

Moller was being questioned by prosecutor Gerrie Nel.

At 3.20am the phone was used to make an internet connection. Moller told the court earlier this could include use of social networks like Twitter, Facebook, or WhatsApp.

At 3.20am Pistorius called 082911, an emergency services number. The call lasted 66 seconds.

This was followed by another internet connection, and then a call at 3.21am to a number ending in 6797 -- security at the Silver Woods estate.

Then, at 3.21am Pistorius called 121, his voice mailbox number. A minute later, Silver Woods' security called Pistorius back.

More internet connections followed, and then, at 3.55am, Pistorius called his friend Justin Divaris.

At 4.01am he called his older brother Carl.

Pistorius has been charged with the premeditated murder of Steenkamp and contraventions of the Firearms Control Act. He allegedly fired a shot from a Glock pistol under a table at a Johannesburg restaurant in January 2013.

On September 30, 2012 he allegedly shot through the open sunroof of a car with his 9mm pistol while driving with friends in Modderfontein.