Cisco GoQAM Informacje Techniczne Pobierz pdf (Strona 302)

Glossary

278 4025561

Rev

PLL

phase lock loop. An electronic servo system controlling an oscillator to maintain a constant

phase angle relative to a reference signal.

polling

In a transmission network system, the active sampling of the status of network devices by a

control and monitoring program.

radio frequency. The frequency in the portion of the electromagnetic spectrum that is above

the audio frequencies and below the infrared frequencies, used in radio transmission systems.

RMA

return material authorization. A form used to return products.

remote terminal. Remote equipment of a supervisory system.

RTC

real time clock.

receive or receiver.

SBS

stimulated Brillouin scattering. The easiest fiber nonlinearity to trigger. When a powerful

lightwave travels through a fiber, it interacts with acoustical vibration modes in the glass.

This causes a scattering mechanism to be formed that reflects much of the light back to the

source.

semaphore

In programming, a control token (variable or abstract data type) used to restrict access to a

resource. The Scientific Atlanta SOUP program uses a semaphore to prevent multiple

instances of the SOUP from running and trying to change Prisma II EMS chassis parameters

at the same time.

SMC

status monitoring and control. The process by which the operation, configuration, and

performance of individual elements in a network or system are monitored and controlled

from a central location.

1 2 ... 297 298 299 300 301 302 303 304 305 306 307 308

Brak uwag

Cisco GoQAM Informacje Techniczne Strona 302