| OSC |
Optical Supervisory Panel
|
| OSD |
On-Screen Display
|
| OSGI |
Open Services Gateway Initiative
|
| OSI |
Open Systems Interconnection
|
| OSMINE |
Operations Systems Modification of Intelligent Network Elements
|
| OSN |
Optical-Service Network
|
| OSNR |
Optical Signal-To-Noise Ratio
|
| OSP |
Outside Plant
|
| OSPF |
Open Shortest Path First
|
| OSS/J |
OSS through Java
|
| OSU |
Optical Subscriber Unit
|
| OTA |
Over the Air
|
| OTM |
Optical Terminal Multiplexer
|
| OTN |
Optical Transport Network
|
| OTOI |
Output 3rd Order Intercept point
|
| OUI |
Optical User Interface
|
| OUSP |
Optical Utility Services Platform
|
| OVPN |
Optical Virtual Petabits Network OR Optical Virtual Private Network
|
| OWSR |
Optical Wavelength Switching Router
|
| OXC |
Optical Cross-Connect
|
| P&L |
Profit and Loss
|
| P1dB |
1dB Compression Point, A figure-of-merit for output power
|
| P2MP |
Point to Multipoint
|
| P2P |
Point to Point
|
| PA |
Power Amplifier
|
| PABX |
Private Automatic Branch Exchange
|
| PACA |
Priority Access Channel Assignment
|
| PACS |
Picture Archiving Communications System
|
| PAD |
Program Associated Data
|
| PAE |
Power Added Efficiency
|
| PAL |
Phase Alternate Line
|
| PAM |
Presence and Availability Management [Forum} OR Pulse Amplitude Modulation
|
| PAMS |
Perceptual Analysis Measurement System
|
| PAN |
Personal Area Network
|
| PANS |
Pretty Amazing New Services
|
| PAPR |
Peak to Average Power Ratio
|
| PAR |
Peak-to-Average Ratio
|
| PAR |
Peak-to-Average Power Ratio
|
| PARC |
Per Antenna Rate Control
|
| PB |
Private Branch Exchange
|
| PBN |
Point-To-Point-Based Network OR Policy-Based Networking
|
| PBX |
Private Branch Exchange
|
| PC |
Personal Computer
|
| PCB |
Printed Circuit Board
|
| PCDE |
Peak Code Domain Error
|
| PCF |
Physical Control Field
|
| PCI |
Peripheral Component Interconnect
|
| PCM |
Pulse Code Modulation
|
| PCM |
Phase Change Materials
|
| PCMCIA |
Personal Computer Memory Card Interface Association – now referred to as PC card
|