Gigabit optical modules are used in Gigabit Ethernet, Synchronous Optical Networks (SONET) with dual channel and bidirectional transmission, while 10G optical modules are used in 10G Ethernet, Synchronous Optical Networks (SONET) with STM-64 and OC-192. Gigabit optical modules are used in Gigabit Ethernet, Synchronous Optical Networks (SONET) with dual channel and bidirectional transmission, while 10G optical modules are used in 10G Ethernet, Synchronous Optical Networks (SONET) with STM-64 and OC-192. This guide explores the evolution from 1G to 10G and how to select the right module for your deployment. Definitions: The Difference One “Plus” Makes SFP (Small Form-factor Pluggable) Originally designed to replace the bulky GBIC, the standard SFP supports speeds up to 1. It is the. A 1G SFP module, also called a Gigabit SFP, supports data rates of up to 1 Gbps. It is commonly used at the access layer of enterprise networks or in scenarios with moderate bandwidth requirements. You can identify the modules by information located on the top of the SFP module. You can identify the 1 gigabit modules by looking for the following. Literally easy to understand, the main difference between Gigabit and 10Gbps optical modules is that the transmission rate is different, the transmission rate of Gigabit optical module is 1000Mbps, while the transmission rate of 10Gbps optical module is 10Gbps. They're inexpensive, easy to terminate, and play nicely with legacy switches and appliances.