micron (µ)

One one-millionth (1⁄1,000,000) of a meter (m). Just to put it in perspective, a human hair is approximately 5–10µ in diameter. The core of a single-mode optical fiber is typically 5–10µ in diameter, and the core of a multimode fiber is typically either 50µ or 62.5µ in diameter. It is through the core of an optical fiber that the optical signal primarily is intended to travel. See also meter and nm.

• Postel’s Law
• Post Office Code Standardization Advisory Group (POCSAG)
• Post Office Protocol (POP)
• Post, Telegraph, and Telephone (PTT)
• potential
• POT (Point Of Termination)
• POTS (Plain Old Telephone Service)
• pound sign
• power back-off
• power density
• powered device (PD)
• power failure cut-through
• power failure transfer
• powerline carrier (PLC)
• power over Ethernet (PoE)
• power (P)
• power sourcing equipment (PSE)
• p-persistent carrier sense multiple access (P-Persistent CSMA)
• P-Persistent CSMA (P-Persistent Carrier Sense Multiple Access)
• P-phone (Proprietary phone)
• P-phone (Proprietary phone)
• PPO (Private Paging Operator)
• PPO (Private Paging Operator)
• PPPoA (PPP over ATM)
• PPPoE (PPP over Ethernet)