[VoiceOps] New to VoIP

Eric Hiller clec at cygnustel.com
Mon Jun 21 17:25:02 EDT 2010

>From my experience setting up a CLEC using open source software is not the
way to go, and I am typically all for open source and design much of my
ISP side around it. If you actually plan on growing I would recommend a
true switch though, it simply takes too much time to roll your own
solution and it will never be as reliable as some of the gear out there.
However, you will also end up spending a minimum of $300k I would


> On 06/21/2010 02:49 PM, Jon Radel wrote:
>> Well mostly. As an example, Acme Packet SDs have very expensive
>> (comparatively speaking, at least) content addressable memory (CAM)
>> wherein lives the lookup table for all active SIP sessions, thus
>> allowing the hardware to deal with a much higher volume of RTP packets
>> than a general purpose computer of the same general size and "power"
>> could hope to process, not to mention making it more resilient to DoS
>> attacks.
> CAM-like memory, and also ASICs to assist in processing of media and
> the CPU work involved in packet forwarding.
> There's no question that pound-for-pound, a high-end SBC can handle a
> whole lot more concurrent calls (with media) than general PC hardware
> with a general purpose task-switching OS with a general purpose PCI
> bus, general purpose I/O scheduler, and a userspace process doing a
> lot of the work.
> However, a) you may not need that and b) depending on what it is
> exactly that you intend to do, it may be quite possible to design a
> topology that does not involve relaying media at all most of the time
> (which is where proxies tend to be useful), in which case the case for
> the open-source option is substantially bettered.
> --
> Alex Balashov - Principal
> Evariste Systems LLC
> 1170 Peachtree Street
> 12th Floor, Suite 1200
> Atlanta, GA 30309
> Tel: +1-678-954-0670
> Fax: +1-404-961-1892
> Web: http://www.evaristesys.com/
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