This article describes fiber optic transceiver selection for Datto Networking Managed Switches.
- Datto Switches
When using fiber connections in a Datto network, it is important to use the correct transceiver and cable combinations.
Types of fiber optic cable
There are two basic types of fiber optic cable:
- Multi-Mode Fiber (MMF): This type is best for short runs, usually 550 meters or less.
- Single-Mode Fiber (SMF): This type is best for longer runs.
The type of cable you use must match with a corresponding transceiver.
Datto Networking transceiver options
- DNW-SFP-1 GB-SX (Multi-Mode, 1 GB speed)
- DNW-SFP-10 GB-SR (Multi-Mode, 10 GB speed)
- DNW-SFP-1 GB-LX (Single-Mode, 1 GB speed)
- DNW-SFP-10 GB-LR (Single-Mode, 10 GB speed)
Determining the cable type
The easiest way to tell the cable type is by the color of the wire.
- Orange: MMF-type, 1 GB throughput (OM1 or OM2 fiber types)
- Aqua: MMF-type, 10 GB throughput (OM3 or OM4 fiber types)
- Lime green: MMF-type, 40 GB throughput (OM5 fiber type)
- Yellow: SMF-type, variable throughput (OS1 or OS2 fiber types)
Determining the speed of an SMF cable
On a single-mode fiber cable, you can identify the speed by connector type:
- SC or ST: Usually 1 GB or slower
- LC: Usually 1 GB or faster (Datto transceivers accept an LC connection)
For the most accurate identification, check the connector on the other side of the run.
- The Difference Between OM1, OM2, OM3, and OM4 Multimode Fibers (external link)
- Single-Mode Fiber: How Much Do You Know? (external link)