Glossary of terms
| Abbreviation | Usage | Meaning |
| BGPv4 |
Border Gateway Protocol version 4 | Dynamic Routing Protocol |
| CPE |
Customer Premises Equipment | |
| DF |
Dark Fiber | |
| DNS |
Domain Name System | |
| DRRL | Digital Radio Relay Line | |
| DS1 | Digital Signal 1 | |
| DS3 | Digital Signal 3 | |
| DVB-C | Digital Video Broadcasting – Cable | |
| DVB-S | Digital Video Broadcasting – Satellite | |
| DWDM | Dense Wavelength Division Multiplexing | |
| EoSDH | Ethernet over SDH | |
| EPL | Ethernet Private Line | |
| EVC | Ethernet Virtual Connection =VLAN-id | |
| EVPL | Ethernet Virtual Private Line | |
| EVPN | Ethernet Virtual Private Network | |
| HDPE | High-Density PolyEthylene | Synthetic material used for cable tubes production |
| IRU | Irrevocable Right of Use | |
| ISO | International Standardization Organization | |
| LAN | Local Area Network | |
| LL | Leased Line | |
| MAN | Metropolitan Area Network | |
| MSP | Multiplex Section Protection | |
| MS-SPRings | Multiplex Section Shared Protection Rings | |
| MTTR | Mean Time to Recover | |
| MTU | Maximal Transmission Unit | |
| NRC | Non Recurring Charge | |
| ODF | Optical Distribution Frame | |
| OSI | Open System Interconnect 7 layer model | |
| PON | Passive Optical Network | |
| PoP | Point of Presence | |
| QoS | Quality of Service | |
| ROADM | Reconfigurable Optical Add Drop Multiplexor | |
| SDH | Synchronous Digital Hierarchy | |
| SFP | Small Form-factor Pluggable | |
| SLA | Service Level Agreement | |
| SM | Single Mode | |
| SNCP | Sub Network Connection Protection | |
| SONET | Synchronous Optical Networking | |
| TT | Trouble Ticket | |
| UNI | User Network Interface | |
| UTP/FTP | Unshielded/Foiled Twisted Pair | |
| VC | Virtual Circuit | |
| VLAN-id | Virtual LAN identifier (=EVC) | |
| WDM | Wavelength Division Multiplexing |