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VOICE and DATA Characteristic
sattar
Member Posts: 48 ■■□□□□□□□□
Hello guys,
Above are the characteristic of voice and data
What i don't understand from the voice is:
- Smooth
- Benign
- UDP priority
and from the data is:
- Smooth/Brusty
- Benign/Greedy
- TCP Retransmits
Thanks in advanced
Comments
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Optionsazaghul
Member Posts: 569 ■■■■□□□□□□
For Voice:
- Smooth: if not using VAD (voice activity detection/silence suppression) voice traffic sends at a constant rate for the duration of the call, for each call. For G.711 this is 80Kb/s and for G.729 is 24Kb/s (excluding L2 overhead)
- Benign: depending on the bandwidth of the link, a single voice call does not eat into this much. A typical 100Mb/s LAN gets reduced by 87Kb/s, a 768Kb/s frame relay WAN gets reduced by 27Kb/s.
- UDP: if the packet is lost, no transmit required.
- Smooth/Brusty: unpredictable in nature depending on what you are doing. Just look at how much a bittorrent download bandwidth varies over the life of the download, 34Kb/s one minute, 792Kb/s the next minute.
- Benign/Greedy: again, unpredictable in nature depending on what you are doing. Just look at how much a bittorrent download bandwidth varies over the life of the download, 34Kb/s one minute, 792Kb/s the next minute. Compare this to simple web browsing.
- TCP Retransmits: if the packet is lost, lets send it again.
