USRobotics U.S. Robotics SureConnect ADSL Ethernet/USB Router manual

U.S. Robotics SureConnect ADSL Ethernet/USB Router User Guide

PAM (Pulse Amplitude Modulation) Modulation method used by modems and DSL equipment. The signal modulates or alters the amplitude or intensity of the carrier. In regular AM, the carrier is a sinewave. In PAM, the carrier is a periodic series of DC pulses.

PCM (Pulse Code Modulation) - Digital modulation method for transmitting analog data. PCM signals are binary. These signals can represent any analog data with only two states, logic 0 and logic 1.

PDM (Pulse Duration Modulation) Modulation method. Signal modulates or alters the duty cycle of the pulse. In PDM, the carrier is a pulse stream. Also called PWM (Pulse Width Modulation).

Peak Cell Rate - Maximum rate (Cells/second) for sending cells to the network.

Phase - Position of a periodic waveform.

PM (Phase Modulation) Modulation method used by modems, radio, and DSL equipment. The signal modulates or alters the phase or position of carrier waves. In regular PM, the carrier is a sinewave. The phase of the modulated carrier changes in proportion to signal amplitude.

Port Priority - Parameter that determines which port becomes the root bridge port.

POTS (Plain Old Telephone Service) - Basic voice service available in residences throughout the United States.

PP(Point-to-Point Protocol) – Communication protocol for dialing up the Internet over a serial link. Such serial links include a POTS and an ISDN line. PPP establishes the session between the user’s computer and the ISP. PPP uses the Link Control Protocol (LCP), which also handles authentication (PAP, CHAP, etc.), compression, and encryption.

PPM (Pulse Position Modulation) Modulation method used by modems and DSL equipment. The signal modulates or alters the location of a pulse in the carrier. The carrier is a stream of pulses.

PPPoA (Point-to-Point Over ATM) – Dial-up Internet connections typically use PPP protocol. PPPoA is a method for running PPP protocol over ATM. PPPoA… ·

∙offers service providers similar billing and access control with a presence in dial-up services.

∙provides session authentication using Password Authentication Protocol (PAP).

∙provides session authentication using Challenge Handshake Authentication Protocol (CHAP).

∙achieves session accounting and conservation of bandwidth by closing down unused sessions.

∙allows the IAD/Router and ISP link to easily negotiate network parameters.

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