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. WIKIMERIONET
Merion Mertics , ,

CRM

QoS

Enterprise

6

IP VoIP . , . , , Quality Of Service (QoS).

. , , VoIP, e-mail Wide Area Network (WAN) . , , 700 , 700 RTP . QoS [ Y.1541]. :

  • : , , ;
  • ( ): , . , end-to-end, . :
    1. : : . - . , . , ;
    2. : . , , , ;
  • (): , , ;
  • : , , , .

- . . , , .

- QoS, , . :

A=Bmax/F

A , Bmax , F . 10-20% . , . QoS .

, QoS , . QoS ; . Cisco IOS :

  • Priority queuing ( - PQ) Custom queuing ( - CQ);
  • Modified deficit round robin - MDRR - ( Cisco 1200 );
  • , Type Of Service (ToS) (WFQ) ( Cisco 7x00 );
  • Class-Based Weighted Fair Queuing (CBWFQ) , ;
  • Low latency queuing (LLQ) . . , . Stacker () Predictor () - , Cisco IOS.

. , . , ( )/( ) , . TCP Real-time Transport Protocol (RTP) .


. , i i + 1 , , "end-to-end" . , , . :

  • (propagation delay) (- );
  • (serialization delay) , . , ;
  • .

, , WAN 128 /. 5000 , , 40 . 66 (528 ). , :

t = 528/128000=0,004125=4.125 .

, 40 . 44.125 . :

D1+Q1+D2+Q2+D3+Q3+D4

1, , , :

t=528/2048000=0,00025781=0,258

, 40,258 .