DM984 product family CHAPTER 4. ACRONYMS
GPON for further information
IPSAN (IP Multiservice Access Platform) – DM4600 Product Line including sup-
port for GPON and many other Services
ITP (Interworking Termintation Point)
MAC (Media Access Control)
ME (Managed Entity) – Specific part of a configuration that is present on the
ONU. A managed entity is configured by one or more OMCI messages.
ODN (Optical Distribution Network) – physical network connecting OLT and
ONU
OFE (Optical Fiber Enclosure) - Underside Enclosure where the fiber is stored
OLT (Optical Line Termination) – Formal declaration of a configuring hard-
ware/software in a GPON network
OMCI (Optical network unit Management and Control Interface) – Used by the
OLT to configure the ONU and watch its behaviour
ONT (Optical Network Termination) – see ONU
1
ONU (Optical Network Unit) – Formal declaration of the user node hardware/-
software in a GPON network that will be configured by an OLT
PPTP (Physical Path Termination Point) - for example an Ethernet interface
QoS (Quality of Service) – Queuing protocol for preferential data handling
SFP (Small form-factor pluggable) – Used to enable different types of physi-
cal connections depending on the customer needs
SNI (Service Node Interface) – Interfaces at the OLT used by the service provider
to deliver the data to a user
1
ONU and ONT is often considered to be the same. This practice is followed in this
manual. However, there is a difference between ONU and ONT, as ONT describes only the
GPON part of a user device. To avoid confusion between the terms or with the acronym OLT
the device is called ONU further on.
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