UFiber - SFP/SFP+ and Active Fiber FAQ


Overview


Click on the Active Fiber questions that interest you. Don't forget to check out the Related Articles below for more information.


Frequently Asked Questions


What SFP/SFP+ module should I use?

First, review which ports you have available on your device, these are either SFP or SFP+ ports. The latter are capable of 10Gbps speeds.

Next, choose which type fiber cable you need. Single-Mode fiber is typically used for longer distances, whereas Multi-Mode is used for shorter distances. If we for example need to connect an ES-16-XG to an ER-8-XG using 10Gbps speeds over a long distance, a good candidate module would be the UF-SM-10G.

Another scenario would be to connect an ER-4 to an ES-10XP using 1Gbps speeds over a short distance. In this case the UF-MM-1G would be a good candidate.

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. Multi-Mode (MM) modules require Multi-Mode fiber cables.

Ubiquiti offers both Multi-Mode (up to 5m) and Single-mode (up to 300ft) fiber cables. The UOC-.5 for example is a short half meter LC Multi-Mode duplex indoor patch cable. The FC-SM-100 is a six-strand LC single mode 100ft indoor/outdoor fiber cable. 

What speeds does the EdgeRouter Infinity (ER-8-XG) support?
The ER-8-XG has 8 SFP+ 10Gb ports capable of 10Gbps or 1Gpbs speeds. The speed of the ports (either 1Gb or 10Gb) is set for a group of four ports and cannot be set individually.

The port groups are eth1-4 and eth5-8. Configuring the speed/duplex for the eth1 interface will set the same value for the entire port group (eth1-4). Likewise, configuring the speed/duplex for the eth5 interface will set the same value for the entire port group (eth5-8).
What speeds does the EdgeSwitch 12F (ES-12F) support?
The ES-12F supports 100/1000Mbps link speeds on ports 1-8 and 1000Mbps-only connections on ports 9-12. The copper ports (13-16) support 10BASE-T, 100-BASE-T and 1000BASE-T connections.
What speeds does the EdgeSwitch 16 XG (ES-16-XG) support?
The ES-16-XG supports 10Gb and 1Gb link speeds on ports 1-12. The copper ports (13-16) support 1000BASE-T and 10GBASE-T connections. 
Can I use SFP+ modules in an SFP slot?
Yes, a SFP+ module will work in a SFP slot at 1000Mbps speeds.
What type of fiber connectors does Ubiquiti use?
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 Ubiquiti products, such as UFiber GPON, use SC connectors.
Can I plug a copper Ethernet cable into an SFP/SFP+ port?
Yes. The UF-RJ45-1G module allows you to connect an Ethernet cable to a SFP port at 10/100/1000Mbps speeds.

Using the UF-RJ45-10G will allow for 10Gb speeds in SFP+ ports.
Will a short cable damage my SFP modules?
Short distance, patch cables and the Ubiquiti FC-SM-100 will not directly damage SFP modules.

The expected Tx Power and Rx Sensitivity are listed below:
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


Note that these are not absolute values and can differ in different deployments. Attenuators can be added to adjust these values if needed.

Related Articles


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EdgeSwitch - SFP/SFP+ and DAC Compatibility List

UFiber GPON - Supported SFP Modules for OLT


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