For 40Gb on single mode (OS1 or OS2) you need just 1 pair of fibers.I'm going to install some fibers at work too for AV-networking so I'd like to inquire this information more deeply: Wikipedia tells me that 100Gbit/s is possible with OM3/4 up to 70/100m. OM5 already exists too and supports even 400Gbit/s. My longest run will not exceed 50m. So I'm planning to install OM4 or OM5 since we will need just 10Gbit/s now and maybe 40Gbit/s in a few years.
Is there anything I'm missing? Is there any good reason to use Singlemode instead?
From what I've read on singlemode fiber multiple frequencies are used in parallel.For 40Gb on single mode (OS1 or OS2) you need just 1 pair of fibers.
For 40Gb on multi mode (OM3) you need 4 pairs of fibers.
That is what I meant with modulation technology.From what I've read on singlemode fiber multiple frequencies are used in parallel.
On multimode fiber it is always the same frequency but used on multiple fibers in parallel.
There are 40 Gb BiDi optics that'll run on a single OM3/OM4 MM pair. Great for 10 to 40 upgrades.That is what I meant with modulation technology.
I think it is not typically used for duplex fibers, I think the main application is FTTx or applications where you want to have 1 fiber instead of 2 (BiDi optics).
Thanks for the link to this guide, it probably kept me from making a mistake that could damage my cables.
Using a Type B Adapter (Key UP / Key UP) would make the two APC MTP Connectors match in the wrong way. I didn't understand this next quoted sentence that has it all written out as simple as possible until I checked this myself:
- One Type B cable in conduit from the cassette in the basement to keystone in the office - this cable: 10m (33ft) 12-Fiber OS2 9/125 MTP® Trunk Cable, OFNP
- One Type B (Key UP / Key UP) coupler in the keystone - this coupler: MTP®/MPO Key-Up to Key-Up Fiber Optic Adapter
- Another Type B cable from the keystone in the office to the cassette in the office - a custom Type B cable with one male and one female connector
So, I can't use a Type B adapter and two Type B singlemode trunk cables to create a connection that would behave like a single Type B singlemode trunk cable.You don't want to insert APC MPO connectors into a key up to key up adapter or you will damage the ferrules.
That is factually incorrect. Both Cat7a and Cat8 have each pair individually screened. If you don't terminate the cable with GC45 or Tera connectors to properly terminate what are now a bunch of twinax cables then you will make things from an electrical perspective worse over Cat6a. Probably much worse. That said at 1Gbps you will probably get away with it because you are likely to be nowhere near the 90m/300ft cabling limit. At 10Gbps your mileage will vary a lot more.CAT.7A cabling ist just for the larger diameter (AWG 22) of the copper for PoE+.