Fiber Optics

FIBRE OPTICS

General

The fibre optic system installed uses Media Oriented Systems Transport (MOST), which is a multimedia network, optimized for automotive applications. Its design allows it to provide a low-overhead and lowcost interface for the simplest of devices, such as microphones and speakers. More intelligent devices can automatically determine the features and functions provided by all other devices on the network and establish sophisticated control mechanisms without distracting the driver.

Under normal installation conditions the system is robust and failures should not occur. However, since the optical fibres convey data using infra-red light, it is vital the passage of light down the fibre is unobstructed. Obstruction of infra-red light can be caused by:

- Contamination of the fibre ends.
- Damage to the fibre ends.
- Bending, kinking or damaging the cable.

NOTE: Fibres damaged by kinking or exposure of the optical core due to abrasion must be replaced.

Handling

Take special care to avoid damage or contamination when handling or working in the vicinity of fibre optic cables and connectors.

NOTE: Damage or contamination includes scratches to the cable ends and pollution caused by dust, dirt, oil or moisture.

CAUTION: When handling fibre optic cables cleanliness is of paramount importance. The fibre ends should not be touched even with clean bare hands as the natural oils deposited from the skin may penetrate the fibre or may cause dirt to adhere to the fibre end.

System malfunctions and unnecessary warranty claims can be minimised by following these guidelines:

- After disconnection of any cables, carefully install appropriate dust caps to protect the mating faces of the connectors from damage or contamination.
- Avoid introducing tight bends (less than 30mm radius) or kinks into the fibre optic cable during service or repair. Tight bends or kinks could impair operation, cause immediate system failure, or future system failure.
- Avoid excessive force, strain or stress on the fibres and connectors, especially permanent stress after reinstallation.