“This bridge is
just one of many major infrastructure projects which have turned to Infinova
fiber optics for more efficient, quality transmissions of images,” reports Mark
S. Wilson, Infinova vice president, marketing. “Since high-performance
surveillance systems require greater reliability and increased throughput, the
leaps forward in CCTV system technology have increased the demand for Infinova
fiber optics.”

To assure duty
officers can maintain smooth flowing traffic and react immediately to a crisis
on the bridge, an Infinova N3731 Series fiber optics transmitter, which
provides the ability to transmit one digitally encoded video channel with
bi-directional RS-232/RS-422 contact closure and DIP selectable data (RS-422/RS-485/Manchester/Biphase)
over one or two fibers, is mounted on the West Gate bridge.

It receives video
from the PTZ dome camera on the bridge and then transmits the video to the West
Gate Bridge Depot via fiber. Another N3731 Series transmitter collects the
video at the Depot. The fiber optics units can be rack-mounted or used as
stand-alone modules, placed on a desktop or mounted to a wall.

Meanwhile, all
videos received from the bridge are distributed to an Infinova N3790 Series
transmitter for transmission over a single fiber to Melbourne City for remote
monitoring. At the same time, the N3790 Series transmitter sends PTZ control
data to the dome cameras via fiber. As a result, duty officers that are
kilometers away can view and control the PTZ control function of the cameras on
the bridge.

The N3790 Series
fiber transmitter is a digitally encoded, highly expandable and flexible fiber
optics transmission system. Data formats support
RS-232, RS-422, 2-wire/4-wire RS-485, Manchester/Biphase and contact closures. Using state-of-the-art CWDM technology, they
transmit up to 64 channels NTSC, PAL, or SECAM video, 32 channels audio, 32
channels data, 32 channels contact closure signal or eight channels intercom.