| Abbreviation | Term | Definition |
|---|---|---|
| BIP | Bit-Interleaved Parity | Is defined as a method of error monitoring. The cable could be damaged or the connector needs to be cleaned. This indicates that there is an issue with the fiber connection. |
| PPPoE | Point-to-Point Protocol over Ethernet | Is a network protocol for encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames. |
| BNG | Broadband Network Gateway | Provide PPPoE sessions to subscribers who request them. |
| CPE | Customer Premises Equipment | - |
| PADI | PPPoE Active Discovery Initiation | CPE sends an initiation packet via broadcast. |
| PADO | PPPoE Active Discovery Offer | BNG replies with an offer packet. |
| PADR | PPPoE Active Discovery Request | CPE sends a session request packet to BNG. |
| PADS | PPPoE Active Discovery Session-confirmation | BNG replies with a session confirmation packet with a session ID. |
| PADT | PPPoE Active Discovery Termination | This packet terminates the connection. It may be sent either from the CPE or BNG. |