SFP-10G-SR vs. SFP-10G-LR – What’s the Difference?
To begin with, 10G SFP+ optical transceivers are easily available in the market and are now a mature technology. They are not too expensive. 40G/100G optical modules are commonly used in data centres and enterprises around the world for interconnection. The 10G SFP+ modules have many different standards such as SFP-10G-LR, SFP-10G-SR, 10GBASE-LRM SFP+ and 10GBASE-ER SFP+. We have focused on the factors that separate SFP-10G-SR from SFP-10G-LR.
The Cisco SFP-10G-SR is in full compliance with the 10G BASE-SR standard. This module has a link length of 26m on the most commonly used standard FDDI- grade multimode fiber. FDDI stands for Fiber Distributed Data Interface. It supports a link length of 300m over OM3 cables and a link length of 400m over OM4 cables.
Cisco SFP-10G-SR transceivers are input/output devices that are hot-swappable. They are linked with a fiber optic network via a 10 Gigabit Ethernet port. Since these transceivers are MSA compliant and hot-swappable they can be plugged into any Cisco SFP+ based transceiver port directly. You won’t need to power them from the host network system for this. What this does is to make add-ons, moves, and exchanges fast and efficient.
The Cisco SFP-10G-SR series has 2 other important modules: the Cisco SFP-10G-SR-X Module and the Cisco SFP-10G-SR-S Module. While the Cisco SFP-10G-SR-S module is a part of the Cisco S-class optics it matches the Cisco SFP-10G-SR module in performance.
The Cisco SFP-10G-LR module is capable of working with a link length of 10 km on any basic single-mode fiber. It is completely in compliance with the 10G Base-LR standard and uses 1310nm lasers. The LR module has no minimum distance, which is why it is ideal for short connections carried over a single mode fiber.
10GBASE-LRM transceivers are often mistaken for 10GBASE-LR SFP+ optics, but it is not the same. 10GBASE-LRM SFP+ makes use of the 1310nm lasers, however, it has a maximum reach of only 220 m over standard multimode fibers such as OM3/OM4. This transceiver is available in the XFP and SFP+ form factors.
Apart from the Cisco SFP-10G-LRM module there is another type of module for multimode fibers, called as the SFP-10G-LRM2. This module refers to a type of SFP+ transceiver that are fully compatible with the 10GBASE-LRM standard and have a reach of about 2km over a standard multimode fiber.
Do you need to buy Cisco Branded or Cisco Compatible SFP+ Modules?
So you have bought an expensive Cisco original brand switch. Now you are considering buying compatible optics for the same. But, do you really need to buy Cisco original brand modules?
Here’s a fact, not all SFP+ modules are compatible with the Cisco switch SFP+ ports. The compatibility factor must be checked before you plug the SFP+ transceivers on to the Cisco switch. Also, the SFP+ modules are critical components of fiber optic networks. That means you need a number of SFP+ modules for your network deployment. So, if you want to save costs, you would be better off with compatible third party modules. There is no point in buying a Cisco branded SFP+ module when you can get identical devices for a fraction of the price from third party sources.
SFP-10G-SR modules are ideal for short-reach 10G application. SFP-10G-LR modules are better suited for an urban network that requires a link length of 10 km. Contact us to learn more about our range of the most robust and dependable compatible SFP-10G-SR or SFP-10G-LR optical transceivers.