RIdea bandwidth for VoIP and Video Conferencing [7:80731] posted 12/12/2003
- Subject: RIdea bandwidth for VoIP and Video Conferencing [7:80731]
- From: "Steiven Poh-\(Jaring MailBox\)" <lppoh@xxxxxxxxxxxx>
- Date: Fri, 12 Dec 2003 11:09:58 GMT
Now I have upgraded, Site A is SDSL UL1.5MB/ DL 1.5MB and
Site B is SDSL UL1.5MB/ DL 1.5MB using VPN connected each other.
Will this enough for VoIP and Video Conferencing? Please advice... Thanks
Do a "pathping" from Site A to Site B Server and captured the result below
Tracing route to 220.127.116.11 over a maximum of 30 hops
0 steivenmobile [18.104.22.168]
Computing statistics for 50 seconds...
Source to Here This Node/Link
Hop RTT Lost/Sent = Pct Lost/Sent = Pct Address
0/ 100 = 0% |
1 0ms 0/ 100 = 0% 0/ 100 = 0% 22.214.171.124
0/ 100 = 0% |
2 120ms 0/ 100 = 0% 0/ 100 = 0% 126.96.36.199
----- Original Message -----
From: "Jim Brown"
To: "Steiven Poh-(Jaring MailBox)" ;
Sent: Tuesday, April 08, 2003 10:39 PM
Subject: RE: Idea bandwidth for Video Conferencing [7:67081]
> I don't think you have nearly enough bandwidth.
> Video connections are full duplex, so you need bandwidth in both
> directions. The available bandwidth will be half. A 64Kbps connection
> could only support a 32Kbps call. I may be over simplifying this, but
> you should get the idea. Toss on the overhead with encryption and
> decryption of the VPN and you are practically left with nothing.
> Video connections are extremely delay sensitive. And the cursory ping
> test show a latency of +300ms. This is pushing the boundary of what I
> would consider acceptable.
> Jitter can be as big an enemy of video as delay and you are seeing a
> difference of 70ms between the fastest and slowest pings and if my
> memory servers me correctly only 1% packet loss is acceptable for video.
> It is really hard to tell you if you have enough bandwidth for video
> calls. If you could be more specific about your application it would be
> helpful. This would help define what acceptable quality is compared to
> the use.
> -----Original Message-----
> From: Steiven Poh-(Jaring MailBox) [mailto:lppoh@xxxxxxxxxxxx]
> Sent: Tuesday, April 08, 2003 5:11 AM
> To: cisco@xxxxxxxxxxxxxx
> Subject: Idea bandwidth for Video Conferencing [7:67081]
> Hi Group,
> I have two site, each site have leased line to ISP.
> Site A is 128K and Site B is 64K using VPN connected each other.
> The question here is what is the idea bandwidth for video conferencing?
> I have done some ping process each site server and here is the result,
> please give me some comment do I have sufficient bandwidth go for video
> Do a "pathping" from Site A to Site B Server and capture the result.
> [Results -
> Pinging 188.8.131.52 with 32 bytes of data:
> Reply from 184.108.40.206: bytes=32 time=403ms TTL=126
> Reply from 220.127.116.11: bytes=32 time=313ms TTL=126
> Reply from 18.104.22.168: bytes=32 time=336ms TTL=126
> Ping statistics for 22.214.171.124:
> Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
> Approximate round trip times in milli-seconds:
> Minimum = 313ms, Maximum = 403ms, Average = 350ms]
> Do a traceroute from Site A to Site B Server and capture the result.
> [Result -
> Tracing route to Site B [126.96.36.199] over a maximum of 30 hops:
> 1 4 ms 4 ms 3 ms 188.8.131.52
> 2 399 ms 356 ms 411 ms 184.108.40.206
> 3 417 ms 408 ms 367 ms Site B [220.127.116.11]
> Trace complete.]
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