= Case 2.0 Fiber Extension [c3voc]

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###### = Case 2.0 Fiber Extension

We want to replace the Module interconnection between Lectern Module and FOH Module, currently build with SDI and Ethernet long runs, with a fiber connection.

###### Motivation

Several situations in different Locations has showed, that long run copper connection, specially SDI are a problem in our use-case. This is mainly caused by the fact, that 20m is often not enough to make a proper connection between stage and FOH and all our existing longer SDI cables are more or less shitty. So instead of buying new long-run SDI cables with a length of about 50m we think it's a better idea to switch to fiber for a more reliable option.

##### Concepts

We extend the Lectern- and FOH-Modules with a fixed build-in SDI fiber-converter with BD-LR module, and equip the switches in both modules with BD-LR modules in their SPF+ trunk ports too. On both sides these modules will be fixed wired to duplex E2000 D-Type ports at one of the patch-panels. For connection we add a cable-drum with ~100m quad fiber cable with E2000 connectors.

##### Design Choices

#### LC vs E2000
While LC is the by far more popular connector and substitutes are way more easy to find in case of a broken cable, E2000 is the more robust connector and since it has integrated dust-covers more easily to handle in an event environment with constant buildups and teardown. To keep us capable of acting in cases where just a LC cable is available the SDI fiber converters will be fixed in the case in a way, that the SFP modules LC connector stays easy accessible.

#### quad vs duplex fiber cable

Even when one fiber is broken in the cable, the cable still keeps usable.

#### BD-LR vs LR

Easier to handle, not so much combinations of wrong connected fibers.

##### BOM

{{tablelayout?rowsHeaderSource=Auto&colwidth="348px"&tableSort=1&tableSearch=1&tablePrint=1}}
^ Product                                           ^ Count  | Single Price  | Overall Price  | Link                                                                                          |
| BMD SDI Fiber Converter                           | 2      | 123,00 €      | 246,00 €       | https://teltec.de/blackmagic-design-mini-converter-optical-fiber-12g.html?sPartner=mo-search  |
| Fiber 4x OS2 E2000(LSH) 50m Pull-Eye single-side  | 1      | 175,71 €      | 175,71 €       | https://www.fs.com/de/products/70220.html?now_cid=1148                                        |
| Cable-Drum                                        | 1      | 83,20 €       | 83,20 €        | https://www.thomann.de/de/schill_gt_310kd_black.htm                                           |
| OS2 E2000 - LC Patch 1m                           | 4      | 12,00 €       | 48,00 €        | https://www.fs.com/de/products/173586.html?now_cid=897                                        |
| E2000 D-Norm Spookie                              | 2      | 23,32 €       | 46,64 €        | https://www.serverschrank24.de/singlemode-kupplung-e2000-e2000-duplex-grun.html               |
| 10G BD-LR 1270nm-TX/1330nm-RX                     | 2      | 45,22 €       | 90,44 €        | https://www.fs.com/de/products/74681.html?attribute=8599&id=180227                            |
| 10G BD-LR 1330nm-TX/1270nm-RX                     | 2      | 45,22 €       | 90,44 €        | https://www.fs.com/de/products/74682.html?attribute=105763&id=3846127                         |
| Fiber Cleaner                                     | 1      | 63,00 €       | 63,00 €        | https://www.fs.com/de/products/39725.html?now_cid=4059                                        |
| Without VAT                                       |        |               | 843,43 €       |                                                                                               |
| With VAT                                          |        |               | 1003,68 €      |                                                                                               |