[VoiceOps] Open source SBC Solutions?

Alex Balashov abalashov at evaristesys.com
Thu Oct 1 18:02:16 EDT 2009

At the same time, you may not actually need an SBC.  People mean many 
different things by the word SBC, and use them for many different 

People who can afford them use them for all functions, and their vendors 
obviously will try their best to ensure that an SBC is the minimal 
needed to do *anything* that smacks of an administrative SIP border, 
whether carrier-facing or end-user facing.

It is not necessarily true.  It really depends on what you need to do, 
the operative constraints, the scalability requirements, etc.

But yes, let's be clear on the fact that OpenSER is not an SBC.  It's a 
proxy.  Whether it might provide the subset of SBC functionality that 
you need is another question.  But it should not be confused with an SBC.

Scott Berkman wrote:

> The only OSS project that really comes close to counting as a SBC (at least
> in its goals) is OpenSBC
> (http://www.opensourcesip.org:8080/clearspacex/community/opensbc), but I
> don't know that it is production-quality and I've never heard of anyone
> using it for anything important.
> 	-Scott
> -----Original Message-----
> From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org]
> On Behalf Of Jonathan Thurman
> Sent: Thursday, October 01, 2009 4:15 PM
> To: VoiceOps
> Subject: Re: [VoiceOps] Open source SBC Solutions?
> On Thu, Oct 1, 2009 at 11:48 AM, Alex Balashov
> <abalashov at evaristesys.com> wrote:
>> It *really*, *really* depends on what you want to *do* with it.
>> As others have pointed out, there are many respects in which the OpenSER
>> family of proxy stacks can perform some common functions of an SBC. There
>> are also many respects in which they absolutely cannot, because at the end
>> of the day they are proxies with limited UAS functionality, not fat,
> opaque
>> B2BUAs loaded with features and ASIC-assisted media relay functionality,
>> etc.
> Good point Alex.  I should say this is not for a ITSP.  I work in
> Education in Oregon, and we are working to improve the communication
> between schools in the state.  We currently have an ageing video
> conferencing set-up using H.323.  We need something to act as an
> external presence for roaming users and inbound calls from other
> agencies for both voice and video.  SIP would be preferred, and the
> H.323 video devices that support SIP will be converted.  In the end,
> we would like to come up with a simple software solution that we could
> give to other educational agencies so we can all communicate.
> Purchasing an ACME is out of the question, not that I have priced
> them, but I don't think I can get one for free...  (However, tax
> deductible donations are welcome =)
> Here is what need:
>  - Voice and video support
>  - Proxy
>  - B2BUA
>  - NAT Traversal
>  - SIP
>  - CDR
> These things would be nice:
>  - H.323 support
>  - Transcoding
>  - Simplified Management
> What is not needed:
>  - Auto Attendant
>  - Conferencing
>  - Stateful fail-over
> There seem to be a lot of solutions out there, and hopefully the
> experience of the list can help narrow down to what actually works.
> Thanks for you help!
> -Jonathan
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Alex Balashov - Principal
Evariste Systems
Web     : http://www.evaristesys.com/
Tel     : (+1) (678) 954-0670
Direct  : (+1) (678) 954-0671

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