Need Help to select the right Fiber type and switches

Need Help to Select the Right Fiber Type and Switches

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Hello HAlqaramani,

Greetings again,

A- Please regarding the cameras, can you tell me the :

1- camera stream kind ( H.264 | MPEG-4 | MJPEG )

2- camera resolution ( 1,2,3,...Mega pixels )

3- video quality ( High | Medium | Low )

4- frame rate (1,2,3,..... frame per second)

According to these data we can count the bandwidth needed to transfer the data through the trunking cables ( cables between building )

Considering Fiber Types

B- Regarding Fiber optics, usually, I use single mode (SM) fiber optic cables between buildings which grants a faster bandwidth than the multi mode (MM). However, the distance between your buildings doesn't require SM as MM is sufficient, but I usually connect buildings with single mode since the price difference is not significant. Additionally, SM is better for future expansion of the network, which means that maybe later on you will need to change the cameras to better ones that require more bandwidth or add more devices like PCs, servers, etc., so it will be a big cost to install new cables!

It's also crucial to consider the shielding of the fiber optics, as it affects the price. For example, you can find a poorly shielded SM cheaper than a well-shielded MM. Therefore, you should give some attention to the environment where the fiber optic will be placed, such as outdoor or indoor, underground, or aerial installations.

In the upper photo, the loose tube fiber optic is cheaper than the one in the lower photo, which has armor, aramid fibers, and dry water-blocking, which increases the resilience of the fiber cable significantly.

According to your project, I would go for SM with 4 cores, 1 for rx, 1 for tx, and 2 as a reserve!

Setup Within Cabinets

Now let's talk about the fibers within the cabinets. If you choose SM, everything should be SM to ensure compatibility. Make sure that during the purchasing process, all components are compatible.

When you install the fiber between the buildings until reaching each cabinet, the next step is splicing. This involves attaching connectors to the ends of the fiber cables. At this moment, you will need to purchase ODF (optical distribution frames) for each cabinet.

According to your project, I would recommend ODF with 4 SC ports housing and 2 LC-LC SM duplex adapters and 4 SM simplex LC pigtails each 1.5 meters and 4 protective sleeves for each building, excluding the main one. For the main building, you will need a larger ODF with a minimum of 16 SC ports housing, 16 LC-LC SM duplex adapters, 32 SM simplex LC pigtails each 1.5 meters, and 32 protective sleeves.

Splicing and Patch Cords

The left picture shows the ODF for a normal building with blue LC-LC adapters and yellow pigtails, while the right picture shows the ODF for the main building. After splicing, the next step is to buy the patch cords and the SFPs.

According to your project, you will need 16 LC-LC SM duplex patch cords (1.5 meters) and 16 SM duplex LC SFPs that are compatible with the chosen switches.

The left picture shows the LC duplex SFP while the right shows the patch cord. Now we are almost done with the fiber optics issue.

Buying Switches and Additional Components

C- You will need to buy switches, cabinets, cable organizers, UTP cables, and patch panels.

According to your project, I would recommend for switches: Cisco 2960-24 ports with at least 1 port for SFP for small buildings, while for the main building I would go for Cisco 3750-12 Ports fiber switch. For UTP cables: it depends if there are electromagnetic waves or if the cables will be laid near power cables, in which case you will need SFTP Shielded Foiled Twisted Pairs cables. For the Patch panels: you can buy any 24 ports patch panel for each building except for the main building, where the number of PCs connected will determine the requirements.

I believe I have provided sufficient information for you to design and install such a project, but don't hesitate to ask if you have any questions or additional inquiries!

I am always happy to help!

Also, please don't forget to rate all my helpful replies and mark them as solutions! It would be greatly appreciated!

Best regards,

Andrew Khalil

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Frequently Asked Questions (FAQs)

Reflectance

Reflectance has always been a secondary issue compared to connection loss but has important considerations. There are two main issues with reflectance: its effect on the output of laser transmitters and the creation of background noise in a fiber link. Reflectance can interact with the laser chip itself, causing laser transmitter nonlinearities or random output fluctuations. The background noise is secondary but can manifest as ghosts in an OTDR trace. These effects are significant on shorter links, such as FTTH or LANs using PONs. We always recommend using APC (angled physical contact) connectors on short SM links.

Electromagnetic Interference

Q: Is there electromagnetic interference with optic cables?
A: Fiber is glass and the cable is plastic, neither of which is affected by electromagnetic interference. There is a cable used in electrical transmission lines called OPGW - optical power ground wire - that has fiber inside a high-voltage conducting wire, which doesn’t bother the fiber at all.

If you have any further questions, please visit SC SC Duplex Patch Cord.