1924
In August 1924 the Sydney metropolitan Communications room was opened at the old Police Force Headquarters, Phillip and Hunter St, Sydney. The call sign allocated was "2PD". The first actual initiated wireless telegraphy in Morse Code was on September 9, 1924. The message was sent to a Sydney Police car - our only radio car. The De Soto had a driver, two detectives and a radio operator. The message, sent at 11.10pm, was "Sergeant Cooper at the Palais Royal wants Sergeant Mackay to ring Paddington....." The crew, says Mr Howard, long-retired Chief Superintendent of the Comms Branch, had to stop and telephone replies.

1930
"2PD" remained at the Police Headquarters until 1930, when it was relocated to the Police Training Centre in Bourke St, Redfern. The call sign was altered from "2PD" to "VKG" to avoid confusion with the burgeoning commercial radio industry.

1937
The Original transmissions were in Morse code up until May 10 1937 when Radio Telephony was introduced. At this time police vehicles were fitted with receivers only and were unable to transmit back. Police would carry out the enquiry and then contact the radio by telephone later with the result.

1957
By 1957 "reply back" technology was in use and the police radio transmissions went from AM to FM.

1965
The control centre was moved again in 1965 to the Criminal Investigation Branch (CIB) building, corner Smith and Campbell St's, Surry Hills. At that stage there were two operational channels and a third channel for emergencies.

1987
In August 1987 the Radio Operations Unit moved to it's present location within the Sydney Policing Centre, Goulburn St, Surry Hills.
In June of the same year, the NSW Police Force (operations) and the NSW Police Department (policy and administrative support) were amalgamated and formalised by the Police Service Act 1990, which, as amended, is the legislation governing our organisation.

1998
On 1 January 1998, the Technical Support Group (TSG) was devolved. The Services Branch was transferred to the State Intelligence Group, while the Communications Branch became a separate command known as the Communications Group.
This followed a review in 1996 which recommended the amalgamation of all communication functions throughout the State into a single business unit.
Five strategically located centres were established to replace the previous 17 radio control rooms:
VKG1 - Sydney: radio broadcasts to metropolitan area
VKG2 - Warilla: to the Victorian border, including the Monaro
VKG3 - Newcastle: from Newcastle to the Queensland border
VKG4 - Wagga Wagga: from the Southern Alps to the SA border
VKG5 - Tamworth: from west of the Dividing Range.
VKG6 - Penrith: broadcasts to Sydney's west.

2000
The Communications Group provides police radio communications and "000" emergency coverage for New South Wales 6.3 million residents. VKG1 (Sydney) alone covers almost 3.9 million people. Employing over six hundred and fifty personnel the Group provides operational and technical support to police and the community 24 hours a day, seven days a week.

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