[asterisk-users] Help with concurrent VoIP calls

[Todd Reese]

Hi Joe,

What is the app that generates your bandwidth table shown below?

Joe Greco wrote:
>> By "fast" I mean the best Business DSL Bellsouth has to offer: "Up to
>> 6.0 Mbps downstream - Up to 512 Kbps upstream"
>>     
>
> That almost sounds like an invitation to check out what business service
> your cableco offers.
>
> One thing to be aware of with DSL and cable modems is that there can be
> various ill effects as your line gets closer to its rated capacity; do
> not expect that you'll get a reliable 512Kbps upstream.  VoIP is sensitive
> to loss, latency, and jitter.  You may be able, for example, to only get
> 384Kbps reliably out of the link (before packet loss/jitter/etc wreck its
> suitability for VoIP).  That's a good time to look seriously at a gateway
> package like pfSense that can prioritize certain classes of traffic while
> also limiting overall bandwidth.
>
> As an example, we noticed on the local business cable offering (2Mbps up)
>
> Shaped 	PL	min	avg	max	stddev
> 2.2M	3	6.4	251	557	176
> 2.1M	1	7.8	350	584	134
> 2.0M	3	6.4	271	535	132
> 1.9M	1	7	254	527	131
> 1.8M	0	6	79	339	90
> 1.75M	0	5.9	14	92	11
> 1.7M	0	5.4	13	77	10
> 1.65M	0	4.9	11	69	7
> 1.6M	0	5.4	13	55	9
> 1.5M	0	5.3	11	59	7
> 1.4M	0	5	11	57	7
> 1.3M	0	4.9	11	54	6
> 1.2M	0	4.9	11	52	7
> 1.1M	0	4.8	14	53	11
>
> The max starts trending up after 1.6M (helps to graph it) and pretty much
> everything goes to hell after 1.75M.
>
> ... JG
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20091108/29c25e15/attachment.htm