Glossary 63

optical waveguide

See optical fiber.

passive device

A device that does not require a source of energy to function.

passthrough

A signal bypass mechanism that allows the signal to pass through a device with little or no signal processing.

point-to-point transmission

Carrying a signal between two endpoints without branching to other points.

protocol

The procedure used to control the orderly exchange of information between stations on a data link or on a data-communications network or system. Protocols specify standards in three areas: the code set, usually ASCII or EBCDIC; the transmission mode, usually asynchronous or synchronous; and the non-data exchanges of information by which the two devices establish contact and control, detect failures or errors, and initiate corrective action.

provisioning

The process by which a requested service is designed, implemented, and tracked.

ring architecture

Anetwork topology in which terminals are connected serially point-to-point in an unbroken circle.

Rx

receive

A terminal device that includes a detector and signal processing electronics. It functions as an optical-to-electrical converter.

scalable

The ability to add power and capability to an existing system without significant expense or overhead.

Installation and Networking Guidelines for Optical Routing

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Nortel Networks 10396EA, 10292FA manual Device that does not require a source of energy to function