The ITU-T Recommendation G.984.2 Amendment 1 (February 2006) specifies the generic optical power levels for a 2.4 Gbps downstream/1.2 Gbps upstream GPON system. For the optical line terminal (OLT), the mean launched power must be between +1.5 dBm and +5dBm and the receive sensitivity must be between -28 dBm and -8 dBm. For the ONT, the mean launched power must be between +0.5 dBm and +5 dBm and the receive sensitivity must be between...
-27 dBm and -8 dBm. Actual vendor implementations may vary, so check their specifications.
For active Ethernet point-to-point (PtP) networks, transmit power and receive sensitivity are functions of the optics used by the particular switching equipment. Cisco's 1000BASE-BX10-D/U Small Form-Factor Pluggable (SFP) Gigabit Interface Converters, for example, have a mean launched power between -9 dBm and -3 dBm and a receive sensitivity between -19.5 dBm and -3 dBm.
Dig deeper on Telecom Resources
Related Q&A from David Hashman
Waning interest in fiber to the home (FTTH) has led to mobile backhaul becoming the main driver of fiber deployment. Will this trend continue? Fiber ...continue reading
Fiber expert David Hashman breaks down the primary cost factors and typical equipment and outside plant expenses associated with deploying fiber to ...continue reading
Fiber expert David Hashman details the key design and other elements to consider when deciding whether to deploy a passive optical network (PON) or ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.