Optical line terminal (OLT)
Its a hardware device in a passive optical network.
The OLT contains
1. central processing unit (CPU),
2. Passive optical network cards,
3. Gateway router (GWR) and a
4. Voice gateway (VGW) uplink cards.
Its part of A GPON system that consists of OLTs that connect several optical network terminals (ONTs/ONUs) together using a passive optical distribution network (ODN).
PIC of a HUAWEI OLT