[OpenSIPS-Users] OpenSIPS as regional/national office solution

Mark Sayer datapipes at avtb.co.nz
Mon Jan 17 10:26:45 CET 2011

Skyler -

We are a South Pacific regional provider of hosted PBX services so I
may be prejudiced toward a like infrastructure. Some of our customers
are 3000kms from our servers but the ping times are still less than
50ms so I'm curious why yours are so long. That said, 200ms is sort of
the magic number you don't want to exceed. (Having said that, we do
get some pretty decent call quality connecting to some terminators who
are over 250ms away. 50+250 and its still OK.) Call quality is 99%
Internet connection. OpenSIPS + Asterisk works perfectly with every
call but if the Internet (which you can't control) plays up you get
flack for providing a bad service.

I'd recommend spending some time looking at your Internet connections.
Can you get them all from the same provider? (I don't even know what
sort of connections you are talking about. We actually get business
grade voice quality from ADSL over copper.) Can you locate your server
in a data center that has good connections to both your ISP and your
terminator? My dream has always been to have a large rack of equipment
in the back office but to make our service work I've had to locate in
a major data centre hundreds of kms away. Our office isn't nearly as
impressive as our service is but that's what the customers pay for.

I'd only put servers in the offices if there was some reason that
functionality was needed there. Even if you need a receptionist at
each office that can all be handled from a single Asterisk box.

Just more thoughts.

On Mon, Jan 17, 2011 at 6:11 PM, Skyler <skchopperguy at gmail.com> wrote:
> Hi Mark,
>  Thanks for the reply. So if I understand correctly, I am thinking too big.
> K.I.S.S as some say.
> The existing PBX's are extremely old, so breakdowns & phones are a problem
> and we don't want to repair anymore. In the suggested scenario would you
> recommend replacing the existing hardware (as they breakdown) with IP phones
> and Asterisk at each office then or just ditch the Asterisk and have all the
> phones register to OpenSIPS directly at HQ? My concern is call quality with
> 110ms to HQ then 75ms to provider = 185ms from furthest office, is this
> still not an issue?
> Thanks,
> Skyler
> On Sat, Jan 15, 2011 at 4:55 PM, Mark Sayer <datapipes at avtb.co.nz> wrote:
>> Here is one suggestion:
>> - single OpenSIPS & Asterisk at central office
>> - use Asterisk as gateway to PSTN (for all offices)
>> - connect remote office PBXs to central office using using multi-port
>> FXS gateways
>> - 110ms is no problem
>> - single system admin point, single cpu, 200 or more concurrent calls
>> - no admin, low cost at remote offices
>> Mark
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