UFiber - Active Fiber FAQ


Overview


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Frequently Asked Questions


What SFP module should I use?

First, review which ports you have available to use, either SFP or SFP+. Then, choose if you need 1Gbps (SFP) or 10Gbps (SFP+) speeds. Next, choose which fiber cable you will use, typically Single-Mode is for longer distances and Multimode is for shorter distances. Finally, match the module with your environment.

For example:

EdgeSwitch 16 XG SFP+ port 0/1--- UF-MM-10G --- UOC-5M ---UF-MM-10G --- ES-48-750W SFP+ port 0/49.

or

EdgeSwitch 16 XG SFP+ port 0/1 --- UF-SM-10G --- Single-Mode fiber cable 5000 Meters --- UF-SM-10G --- ES-48-750W SFP+ port 0/49 

What fiber cable should I use?

There are many vendors that provide fiber cable. If using a module that states Single-Mode (SM), Single-Mode fiber will need to be used. Multimode (MM) modules require Multimode fiber. Ubiquiti has offerings for both Multimode (up to 5 Meters) and Single-mode (up to 300ft). The UOC-.5 for example is a short half meter LC multimode duplex indoor patch cable. The FC-SM-100 is a six-strand LC single mode 100ft indoor/outdoor fiber cable. More details about these products can be found here.

What speeds does EdgeRouter Infinity support?
The EdgeRouter Infinity (ER-8-XG) has 8 SFP+ 10Gb ports. The speed can be set to 1Gb or 10Gb for a set of ports, however, each port cannot be set individually. For instance, setting the speed for eth1 sets the speed for eth1-4; and setting the speed for eth5 sets the speed for eth 5-8.
What speeds does the EdgeSwitch 12F support?
The ES-12F supports 100/1000Mbps connections on ports 1-8 and 1000Mbps-only connections on ports 9-12. The four copper ports 13-16 support 10/100/1000Mbps connections.
What speeds does the EdgeSwitch 16 XG support?
The ES-16-XG supports 10Gb and 1000Mbps link speeds. In firmware 1.7.1 and higher there is also an auto-detect option which will not auto-negotiate, but auto-detect the speed from the other end of the link. The four copper ports 13-16 support 1000Mbps and 10GBaseT connections. 
Can I use a SFP+ modules in an SFP slot?
Yes, a SFP+ module will work in a SFP slot at 1000Mbps speeds.
What type of Fiber connectors are there?
All of our UFiber Modules use LC connectors. Some are LC-Duplex where two fiber strands are required (one transmits and one receives). Some are LC-Simplex BiDirectional (BiDi) which require a single strand (transmits and receives on different frequencies on the same strand). Other types of fiber connectors include SC (Used in UFiber GPON) and M2000.
Can I plug up a copper cable to an SFP port?
Yes, Using UF-RJ45-1G you can connect an Ethernet connection to a SFP port at 10/100/1000Mbps speeds. Using the UF-RJ45-10G will allow for 10Gb speeds.
Will a short cable damage my SFP modules?
Short distance, patch cables and the Ubiquiti FC-SM-100 (100ft Single-Mode six-strand LC indoor/outdoor cables) will not directly damage SFP modules. The expected Tx Power and Rx Sensitivity are listed below. Note that these are not absolute values and can fluctuate in different deployments. Attenuators can be added to adjust these levels, but are not typically required. 
 SFP Model Tx Power Rx Sensitivity
UF-MM-1G -9 to -3dBm -17dBm
UF-MM-10G -7 to -1 dBm -11 dBm
UF-SM-1G-S -9 to -3dBm -21dBm
UF-SM-10G -8 to -.5dBm -12dBm
UF-SM-10G-S -6 to -1dBm -14dBm

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