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

Mark Sayer datapipes at avtb.co.nz
Wed Jan 19 23:20:19 CET 2011

We use NAThelper and find it to be a perfect solution for us.

Regarding Bogdan's comments ... I agree 100%. The centralised network
works for us and I recommend that others consider it but you have to
meet your own requirements.


On Tue, Jan 18, 2011 at 9:28 PM, Skyler <skchopperguy at gmail.com> wrote:
> Mark -
>  Thanks for sharing your thoughts, they are definitely helping to put the
> pieces of this puzzle together. Today I spent most of the day mapping out
> each office via the net and found the common backbone interconnects. At
> these x-connects I found 2 data centers. All offices are 30-40ms from one or
> the other and both DC's are 15-20ms from each other. I couldn't figure out
> what the distance would be from the DC to the provider, though I know the
> provider is in a major DC and one Province over so it can't be more than
> 15-20ms across the backbone.
>  Both DC's offer dedicated servers, so we are going to look into putting one
> server at each DC and ditch the original regional/national plan for a more
> conservative and easy to manage plan. I'm confident now that there will be
> better overall quality going this way.
> Now its time to unscramble the mess that is my install notes and document a
> clean OpenSIPS+Asterisk install before moving further. After that I'm a bit
> lost though as I know that we need NAT but not sure which solution is best /
> easiest to work with (RTPproxy, NAThelper, MediaProxy). From what I've read
> up on each, Nathelper seems to be built into Osips whereas RTPproxy and
> MediaProxy require a possibly troublesome install vs loading module/adding
> code. Searching the mailing archives hasn't been enough for me to decide on
> a winner.
>  From what it sounds like, you have a lot of experience in the setup that
> I'm working on building. Out of curiosity, which method do you prefer for
> resolving far-end NAT issues?
> Skyler
> On Mon, Jan 17, 2011 at 1:26 AM, Mark Sayer <datapipes at avtb.co.nz> wrote:
>> 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.
>> Mark
>> 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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>> > Users at lists.opensips.org
>> > http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>> >
>> >
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