| PABX  | 
            Private Automatic Branch
            Exchange | 
          
          
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            | Packet | 
            A piece of data transmitted
            over a packet-switching network such as the Internet. A packet includes not just data but
            also its destination. | 
          
          
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            | PACTS  | 
            Public Access Cordless
            Telecommunication Service | 
          
          
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            | PAN | 
            Personal Area Network | 
          
          
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            | Parked Units | 
            Those devices within a
            piconet which are synchronized but do not have a MAC address. | 
          
          
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            | PBX  | 
            Private Branch Exchange | 
          
          
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            | PCI | 
            Protocol Control
            Information | 
          
          
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            | PCN  | 
            Personal Communications
            Network | 
          
          
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            | PCS | 
            Personal Communications
            Service. New digital cellphone systems in 2GHz range. Mostly GSM. | 
          
          
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            | PDA | 
            Personal Digital Assistant.
            Handheld computer or personal organiser device. | 
          
          
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            | PDC | 
            Personal Digital
            Communications. Digital cellphone system in Japan. | 
          
          
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            | PDC (2) | 
            Personal Digital Cellular
            System Phones using the PDC, which is an international cellular system that uses both
            full, and half rate speech code (5.6 kbps) and allows high speed transmission at 9.6 kbps
            to ensure efficient spectrum utilization | 
          
          
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            | PDI | 
            Protocol DIscriminator | 
          
          
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            | PHS  | 
            Personal Handyphone System | 
          
          
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            | PIC | 
            Point In Call | 
          
          
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            | Piconet | 
            A network of devices
            connected using Bluetooth wireless technology. A piconet may consist of two to eight
            devices. In a piconet, there will always be one master while the others are slaves. | 
          
          
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            | PID | 
            Protocol Identifier | 
          
          
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            | PIN  | 
            Personal Identification
            Number | 
          
          
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            | P-Java | 
            Personal Java. Java API and
            specification for running Java applications on small devices. | 
          
          
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            | PLMN  | 
            Public Land Mobile Network,
            cellular network | 
          
          
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            | PM | 
            Personal Mobility | 
          
          
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            | PMTS  | 
            Public Mobile Telephone
            System | 
          
          
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            | PN  | 
            Personal Number | 
          
          
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            | Pocket PC | 
            A handheld Windows-based
            computer that runs the Pocket PC operating system (formerly Windows CE). The Pocket PC
            operating system (Version 3.0 of Windows CE) adds a new interface along with greater
            stability, Pocket Office applications (Internet Explorer, Word and Excel), handwriting
            recognition, an e-book reader, wireless Internet and longer battery life. The Pocket PC
            was designed to compete more directly with the popular Palm devices. | 
          
          
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            | POI  | 
            Point of Interconnect | 
          
          
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            | POR | 
            Point Of Return | 
          
          
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            | POTS | 
            Plain Old Telephony Service | 
          
          
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            | PRI | 
            PRIority | 
          
          
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            | PSTN  | 
            Public Switched Telephone
            Network | 
          
          
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            | PSTS  | 
            Public Switched Telephone
            Service | 
          
          
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            | PTNX | 
            Private Telecommunication
            Network eXchange | 
          
          
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            | PTO  | 
            Public Telecommunication
            Operator |