[Spce-user] if it cannot do pbx functions, what exactly would one use it for?

Theo axessofficetheo at gmail.com
Wed May 22 07:39:14 EDT 2013

Hi Andreas

Thanks for the quick response. We already use both Freeswitch and Asterisk
and it does indeed fit our purpose. I think I was thrown off by the
following paragraph from your handbook

In the past, creating a business-ready VoIP service included installation
and configuration of SIP software like Asterisk, OpenSER, Kamailio etc.,
which can get quite difficult when it comes to implementing advanced
features. It required to implement different web interfaces, billing
engines and connectors to existing OSS/BSS infrastructure. These things are
now obsolete due to the CE, which covers all these requirements.

The way that was put made me believe one can do away with Asterisk :-) - my
bad for misunderstanding I guess but you may want to word that differently.

I agree that it works very well - no complaints at all, and I am pretty
sure we will end up using this once I have ironed out the SBC upper
registration issue (just not as I had initially envisaged) but I had simply
hoped to eventually do away with the plethora of Asterisk servers and some
freeswitch ones that we currently have running. Faxing is not really a
requirement for us (I thought faxing is almost dead?), nor is any of the
unified communications stuff at the moment. We really just offer
termination and hosted PBXs to our customers.


On Wed, May 22, 2013 at 1:07 PM, Andreas Granig <agranig at sipwise.com> wrote:

> Hi,
> On 05/22/2013 12:47 PM, Theo wrote:
>> - I understand that each subscriber is set up with an E.164. So - a
>> company is assigned a DID by us. Only 1. But they may have 20
>> subscribers? What E.164 numbers do we set up for each of their
>> subscribers? Do we just make them up? That will get confusing very
>> quickly I think - no longer knowing what is the real number and which is
>> not?
>> - I am unclear on the "implied extensions". Subscribers will want to
>> phone each other by dialling an extension. I can set up a rewrite rule
>> so that when I dial "400" it rewrites it to whatever E.164 number, but
>> that just seems very cumbersome having to do all that for each subscriber?
> If your E164 number is 12345, you can create your subscribers using
> 12345400, 12345401, 12345402 etc. However, you're trying to model a use
> case on the CE which it's not exactly designed for.
>  - Can calls be transfered to another subscriber? Currently that is not
>> working in my setup but that may well be because I have overlooked
>> something.
> REFER is not enabled by default, I guess you're getting a "4xx Not
> Implemented", right? You'd need to add REFER to the line
> in kamailio.cfg.tt2 (or better copy it to kamailio.cfg.customtt.tt2 and
> modify it there) in /etc/ngcp-config/templates/**etc/kamailio/proxy/.
> It's not enabled by default for billing reasons, as a subscriber might get
> referred to some premium number, without having its end device prompt for
> that. This is something where you need to make sure the clients you're
> using are playing well with these sort of things, otherwise you might make
> your users very unhappy if you have fraudulent users on the platform.
>  I have seen the post about "ring groups" and that parallel forking is
>> not possible. The view was that this will be part of a PBX module you
>> will release? But if there really are almost no PBX features, then what
>> exactly would we use it for other than as an SBC? End users will want
>> those features, or at least a basic set of them? I had not understood
>> from the onset that this is not part of it and embarked on it with the
>> end goal being the PRO version. But at that price I expected something
>> with all the bells and whistles of a fully fledged PBX. If it really
> This is not a PBX, it's a Class5 soft-switch used to serve hundreds of
> thousands of subscribers, and it does this very well for the purpose it's
> designed for. PBX functionality is an add-on to the PRO, and for price of
> the PRO, it gets quite attractive compared to competitive solutions. Maybe
> you're rather looking into a pure PBX solution like Freeswitch or Asterisk
> instead, which might fit your purpose better?
>  only does what the CE version does, but with more redundancy and prepaid
>> billing then I'd have a very hard time selling the concept to the powers
>> that be - it really just does routing because the other functions would
>> not really be useful without having more features?
> You might want to get in touch with our sales team for a presentation of
> the PRO. It comes with a fax solution, mobile clients, unified
> communication clients based on cusax (a combined SIP/XMPP approach with
> just works, compared to SIP/SIMPLE) and add-ons like hosted PBX.
> Andreas
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