R&M Data Center Handbook
R&M Data Center Handbook
R&M Data Center Handbook
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www.datacenter.rdm.com<br />
MU Connector (IEC 61754-6)<br />
The first small form connector was the MU connector. Based on its 1.25 mm ferrule, its appearance and functionnality<br />
is similar to the SC, in half the model size.<br />
FC (Fibre Connector, IEC 61753-13)<br />
E-2000 (LSH, IEC 61753-15)<br />
MT-RJ (IEC 61751-18)<br />
A robust, proven first generation connector. The first true WAN<br />
connector, and still millions in use. Disadvantageous for use in<br />
confined space conditions because of its screw cap and therefore<br />
not considered for use in current racks with high packing<br />
densities.<br />
This connector is a development from Diamond SA and is geared<br />
to LAN and CATV applications. It is produced by three licensed<br />
manufacturers in Switzerland, which has also led to its unequalled<br />
quality standard. The integrated dust shutter not only provides<br />
protection from dust and scratches, but also from laser beams.<br />
The connector is can be locked using frames and levers which<br />
can be color coded and mechanically coded.<br />
The MT-RJ is a connector for LAN applications. Its appearance matches that of the familiar RJ45 connector from<br />
the copper world. It is used as a duplex connector.<br />
F-3000 (IEC 61754-20 compatible)<br />
LC-compatible connector with dust-laser protection cover.<br />
F-SMA (Sub-Miniature Assembly, IEC 61754-22)<br />
Connector with screw cap and no physical contact between ferrules. The first standardized optical fiber connector,<br />
but only used today for PCF/HCS and POF.<br />
LX.5 (IEC 61754-23)<br />
Similar to the LC and F-3000 in size and shape, but only partially compatible with these connectors because of<br />
different ferrule distances in duplex mode. Developed by ADC.<br />
SC-RJ (IEC 61754-24)<br />
As the name reveals, the developers at R&M geared this<br />
connector to the RJ45 format. Two SCs form one unit in the<br />
design size of an RJ45. This corresponds to SFF (Small Form<br />
Factor). The 2.5 mm ferrule sleeve technology is used for this<br />
connector. As compared to the 1.25 mm ferrule, it is more robust<br />
and more reliable. The SC-RJ therefore stands out not only<br />
because of its compact design, but also through its optical and<br />
mechanical performance.<br />
It is a jack-of-all-trades – usable from grade A to M, from single mode to POF, from WAN to LAN, in the lab or outdoors.<br />
R&M has published a white paper on SC-RJ (“SC-RJ – Reliability for every Category”).<br />
Adapters<br />
The best optical fiber connector will not be of any use at all if it is combined with a bad adapter. This is why R&M<br />
adopted its grade philosophy for adapters as well. The following values were the basis for this:<br />
Optical properties, IL Insertion Loss Grade B Grade C Grade D Grade M Grade N<br />
Sleeve material Ceramic Ceramic<br />
Attenuation variation (IL) Delta<br />
IEC61300-3-4<br />
Phosphor<br />
bronze<br />
Ceramic<br />
Phosphor<br />
bronze<br />
0.1 dB 0.2 dB 0.3 dB 0.2 dB 0.3 dB<br />
R&M <strong>Data</strong> <strong>Center</strong> <strong>Handbook</strong> V2.0 © 08/2011 Reichle & De-Massari AG Page 123 of 156
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