电信专业英英词典P-3（在线收听）

　　PVC

　　permanent virtual circuit

　　Partner＊s Program - An indirect sales channel that offers smaller businesses in the TDS Telecom service areas an opportunity to promote and sell TDS Telecom products and services.

　　Password - A code or word used to gain access to restricted data on a computer network. While passwords provide security against unauthorized users, the security system can only confirm that the password is legitimate, not whether the user is authorized to use the password. That's why it is important to safeguard passwords by:

　　* Never disclosing your password to anyone.

　　* Creating a password that consists of letters, numbers, and symbols.

　　* Changing your password frequently.

　　PCS (Personal Communications Services) - Originally meant to describe digital service offered at a higher frequency (1900 MHz) than wireless, it is now used as a generic term for all digital (versus analog) wireless.

　　PDF - An acronym for Portable Document Format, PDF is a file type created by Adobe Systems, Inc. that allows fully formatted, high-resolution documents to be easily transmitted across the Internet and viewed on any computer that has Adobe Acrobat Reader software.

　　Peering - The arrangement of information sharing between Internet Service Providers at various NAPs.

　　PIC Freeze - Pre-subscribed Interexchange Carrier Freeze. An agreement between a customer and their local telephone company to prevent ※slamming§ on their long distance telephone bill.

　　Pipeline - An extremely high-speed, large capacity bandwidth connection.

　　Point of Presence (POP) - A location where a you can connect to a network through local telephone lines.

　　Point-to-Point Protocol - A program that allows a computer to use a telephone line and modem to make TCP/IP connections.

　　PON (Passive Optical Network) - a fiber-based network built without active electronics. Because a PON network uses optical splitters rather than costly active electronics, it is less expensive to build and maintain than a network that uses active electronics. PONs are still more expensive than copper-based networks. A PON network is usually used in a local loop to connect customers to the central office. BPON (Broadband Passive Optical Network) is a broadband PON.

　　POP - See Point of Presence and Post Office Protocol

　　Post Office Protocol (POP) - A system that allows hosts to get e-mail from a server.

　　POPs (Population equivalents) - The population of a market multiplied by the percentage ownership of that market.

　　PPP - See Point to Point Protocol