The OLT serves as the starting point of a PON, connecting to the core switch via an Ethernet cable. An OLT (Optical Line Terminal) is the core device in a Passive Optical Network (PON) — the interface between the core network and the subscriber's optical access network. It aggregates multiple ONUs/ONTs through optical splitters and handles data distribution, management, and synchronization. Copyright © 1981, Regents of the University of California. When you stream a 4K video, join a remote meeting, or play an online game on a gigabit fiber connection, an OLT. ASGvOLT64 is a 64 port GPON OLT virtual Optical Line Terminal (vOLT) with 2 fixed 40/100G QSFP28 uplink ports capable of breaking out to 4 x 25/10G, 8 fixed 10/25G SFP28. All interfaces are able to be accessed from the front panel.