Not only do we provide these services direct to businesses and schools we also work with a number of partners including electrical contractors and IT companies.

Call Lee or Garry on 01706 217755 to discuss your specific requirements.

OM3 and OM4 fiber are referred to as “laser-optimized” multimode fibers because they are specifically designed for optimum performance when used with low cost Vertical-Cavity-Surface-Emitting-Lasers (VCSELs).

OM4 fiber is designed to enhance the system cost benefits enabled by 850nm VCSELs for existing 1 Gb/s and 10 Gb/s applications as well as future 40 Gb/s and 100 Gb/s systems.

OM4 fiber supports Ethernet, Fibre Channel, and OIF applications, allowing extended reach upwards of 550 meters at 10 Gb/s for ultra long building backbones and medium length campus backbones.

:: Why Is It Called OM4?

Multimode fibers are identified by the OM (“optical mode”) designation as outlined in the ISO/IEC 11801 standard.

• OM1, for fiber with 200/500 MHz*km overfilled launch (OFL) bandwidth at 850/1300nm (typically 62.5/125um fiber)
• OM2, for fiber with 500/500 MHz*km OFL bandwidth at 850/1300nm (typically 50/125um fiber)
• OM3, for laser-optimized 50um fiber having 2000 MHz*km effective modal bandwidth (EMB, also known as laser bandwidth), designed for 10 Gb/s transmission.
• OM4, for laser-optimized 50um fiber having 4700 MHz*km EMB bandwidth designed for 10 Gb/s, 40 Gb/s, and 100 Gb/s transmission.

:: OM4 Fiber Standard

The TIA/EIA approved OM4 specification in its TIA-492AAAD in 2009. IEC’s document covering OM4 standard is IEC 60793-2-10 as fiber type A1a.3.

:: Bandwidth Comparison of OM1, OM2, OM3, and OM4 Fibers

The following table shows the bandwidth comparison among OM1, OM2, OM3 and OM4 fibers.

The following table and graph shows the maximum distance different multimode fibers can carry.

http://www.fiberoptics4sale.com/wordpress/what-is-om4-fiber/

The installation of 8 core OM3 multi-mode fibre optic from the main server room to all the secondary communication cabinets around the campus. The network topology has been installed as in a star formation; this means that each communications cabinet is fed by its own back bone reducing any potential bottle necks. The fibre optic cable is duct grade corrugated steel tape that provides a high degree of mechanical protection including the prevention of rodent damage. The campus has had additional fibre optic cables installed in key areas to provide a degree of network resilience, this will protect the networks integrity in the event of a cable being cut or damaged.

All fibre-optic cores were terminated on site using a Fitel fusion splicer and factory polished ST/SC or LC pigtails. On completion of the terminations each core was fully tested using a Noyes OTDR with typical splice losses of less than 0.1dBs, the accepted industry standard for a join or splice is 0.5dBs.

The task was to install an inter-active whiteboard, IWB, with an ultra-short throw projector that would be a useful teacher aid for their year 8.

We carried out a free site survey to establish the school’s requirement and to assess the classroom size that the proposed the AV installation was intended for. After the site survey a decision was made to install a Promethean Activboard+2 87” wide screen. With the accompanying free software including ActivInspire the classroom has been transformed into a fun and useful interactive experience.

• To install a 6 x NetGear  ProSafe dual-band access points supporting wireless N and Power-over-Ethernet (PoE)
• 1 x NetGear ProSafe 16 AP Wireless Management System, this will manage all the access points from a central location.
• 1 x NetGear FS108P – 8 port 10/100 switch with 4 ports PoE to power 3 of the access points from a lofted area.
• 1 x NetGear GS724TP – 24 port rack-mount Gigabit Switch with PoE to power the other remaining APs.

The proposed Category 7 will involve the use of shielded rather than unshielded twisted pair copper cabling. The switch will help achieve data rates of over 1GB. However, it may be that installing fibre is the only way to future-proof an office currently being fitted with a network.

Proponents of fibre to the desktop point out that, despite the advances in signalling technology that have allowed data rates over copper to rise from 10Mb to 100MB and now to 1GB, there are intrinsic limitations on the capacity of copper cabling. As data rates begin to approach 10GB, the cost of the transmission equipment will begin to rise rapidly and the transmission distances possible fall equally rapidly. If so, multi-mode fibre optic cables could become more cost effective than copper for horizontal networks.

The project also required integrating multiple Power over Ethernet (PoE) switches into the existing infrastructure to power the wireless access points as well as PoE injectors where that was not possible. The wireless security was set to WPA-PSK2 to ensure full security, essential in an academic environment.

John Shaw (Director, Finance & Resources) commented “Groundwork Merseyside is grateful for the advice, expertise and professional approach from all at Lucas / NCS which ensured that a difficult job was completed on time and within budget.”