Avaya 555-245-600 Manual Do Utilizador

The CNA assessment of application performance is based on application models, which 
convert the raw delay, jitter, and loss measurements into an application performance rating that 
ranges from 0 to 5. This rating is normalized across applications. Application models are 
tailored to different applications, including VoIP, and take into account the specific 
characteristics and requirements of the various applications.
CNA Application Models follow a five-stage methodology, shown in 

From the bottom, the five steps include:

●

The measurement of low-level network parameters such as latency, loss, and jitter for 
each available path between locations. 

The computation of transport delay from the raw scores; this takes into account the distinct 
characteristics of Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), and 
thus assesses the impact on applications in general, not taking specific application sensitivities 
into consideration. 

●

The computation of application delay, specifically the transaction between the two end 
points. 

●

The determination of an application performance rating, using a ranking from one to five 
stars, similar to movie ratings. 

●

Finally, the time periods where the voice quality is determined to be unacceptable are 
logged as “bad minutes” for that path. Adding up the bad minutes allows CNA to compute 
the effect of network problems on application availability