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Cisco Catalyst PON Series OLT Overview
Figure 1: Components of GPON
The data, voice, and video signals of an end-user devices are sent to ONTs. The signals are converted into
GPON Encapsulation Method (GEM) frames and then transmitted over optical fibers to the OLT using the
PON uplink ports on the ONTs. On the OLT the GEM frames are converted into Ethernet packets and are
forwarded to the upper-layer IP network using the uplink port on the OLT.
For more information, see the following sections:
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Cisco Catalyst PON Series OLT Overview
The Cisco Catalyst PON Series OLT is an aggregation device that is located at a service provider's central
office of the PON network. The main functions of a Cisco Catalyst PON Series OLT are traffic scheduling,
buffer control, and bandwidth allocation. The Cisco Catalyst PON Series OLT manages the network traffic
that is in the form of video, data, and voice signals in a PON network, and sends them downstream to the
Cisco Catalyst PON Series ONTs on the network. The Cisco Catalyst PON Series OLT also receives the
signals from the Cisco Catalyst PON Series ONTs located at an end user's premises and sends them to their
destination over the internet.
A Cisco Catalyst PON Series OLT can support up to 128 Cisco Catalyst PON Series ONTs per port. A Cisco
Catalyst PON Series OLT provides 8/16xPON ports, 4xG combo ports and 2x10G small form-factor pluggable
(SFP+) ports for uplink. A Cisco Catalyst PON Series OLT carries abundant services and flexible network
mode over one optical network, and is especially suitable for networks such as enterprise LAN, video
application, and high-speed internet.
Cisco Catalyst PON Series OLT Models
The following table lists the Cisco Catalyst PON Series OLT models and their description.
Cisco Catalyst PON Series Switches Hardware Installation Guide
2
Cisco Catalyst PON Series OLT Overview, on page 2
Cisco Catalyst PON Series ONT Overview, on page 7
Cisco Catalyst PON Manager Overview, on page 15
Introduction to Passive Optical Network
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