Cisco SFP-10G-SR Modules Overview

SFP+ transceiver is widely used to support communication standards including synchronous optical networking (SONET)/synchronous digital hierarchy (SDH), gigabit ethernet and fiber channel , which plays an important role in today's network applications.This article will focus on Cisco SFP-10G-SR Modules

Cisco SFP-10G-SR Introduction

The Cisco 10GBASE-SR Module supports a link length of 26m on standard Fiber Distributed Data Interface (FDDI)-grade multimode fiber (MMF). Using 2000MHz km MMF (OM3), up to 300m link lengths are possible. Using 4700MHz km MMF (OM4), up to 400m link lengths are possible.

Main features of Cisco 10GBASE SFP+ modules include:

● Smallest 10G form factor

● Supports 10GBASE Ethernet and OTU2/OTU2e

● Hot-swappable input/output device that plugs into an Ethernet SFP+ port of a Cisco switch

● Provides flexibility of interface choice

● Supports “pay-as-you-populate” model

● Supports digital optical monitoring capability

● Supports the Cisco quality identification (ID) feature that enables a Cisco switch to identify whether the module is certified and tested by Cisco

 SFP-10G-SR transceivers use VCSEL laser diode as light emitter. VCSEL lasers main advantage is low cost and simple production process, but VCSEL can emit only relatively wide beam of light, therefore it is adaptable only with multi-mode fiber. VCSEL’s on SFP-10G-SR transceivers use 850nm as center wavelength and occupy 20nm (840-860nm) spectrum. As receiver or light detector SFP-10G-SR modules use PIN photodiode, which is relatively cheap but with rather low sensitivity, if compared with another type of photodetectors used in long-range transceivers -APD. Application of VCSEL Laser diode and PIN photodetector deliver minimum guaranteed optical budget of 4.6 dB

SFP-10G-SR optical transceiver support GE?

Indeed – SFP-10G-SR modules may support GE speeds, however, this depends on host system port properties. It will not mostly work under Cisco Catalyst switches, but in some systems You can configure 10G port to run in GE mode and it will be supported by transceiver module.

Is Cisco SFP-10G-SR transceiver supported in other manufacturers switches?

Well, it depends on switch manufacturer. Most of host system vendors has no protectionism policy and accepts any MSA compatible transceiver in their systems. All of the protection algorithms comes on top of MSA guidelines, so Cisco SFP-10G-SR will work on all MSA compatible systems. However – if it will be used with system using different own proprietary algorithm, it will not be supported.

Summary

The Cisco 10GBASE SFP+ modules offer customers a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications. they can be plugged into an Ethernet SFP+ port of a Cisco switch and it is no need to power down when installing or replacing them. They also have the digital optical monitoring capability for strong diagnostic capabilities.

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