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

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 €