VOIP PBX -- 3CX, GrandStream, Asterisk ?

I have been testing Switchvox, the commercial version of Asterisk, but it costs a lot.

What VOIP PBX do you recommend for the
below so we can have $0 annual costs ?
  ** 150 phones
  ** 3 PBXes (one at each site)
  ** 18 total SIP lines (6 at each site)
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Ron MalmsteadInformation Services ManagerCommented:
.. They will all accomplish the goal, the only real difference is that it has no support, because they are free.  You could still get hardware related support.. For example a digium e1/t1 card purchased gives you a basic support level for setup related issues.

I myself use open source asterisk .. With well over 150 phones.. Which I support myself.
finance_teacherAuthor Commented:
What PHONES do you recommend ?
Ron MalmsteadInformation Services ManagerCommented:
I use Linksys spa phones. 942 model
I believe Cisco may have purchased them since I bought mine though.  You can use any SIP compatible phone however.  I've used grandstream phones too.
Powerful Yet Easy-to-Use Network Monitoring

Identify excessive bandwidth utilization or unexpected application traffic with SolarWinds Bandwidth Analyzer Pack.

Ron MalmsteadInformation Services ManagerCommented:
Ron MalmsteadInformation Services ManagerCommented:

An many others, including FreeSwitch --

In reverse order -----

  ** 18 total SIP lines (6 at each site)   -- No, two SIP trunks at each site from separate providers.  SIP will deliver DIDs and is measured based on Call paths, so six active calls = six call paths.    Depending on where your offices are they may be the same provider or different providers.  IPComms, Vitelity, Anveo, Did4Sale, Flowroute to name a few are all options.


** 3 PBXes (one at each site) - SuperMicro systems make great servers.  

 ** 150 phones - Snom, Polycom, Aastra, YaeLink, Digium , Cisco, Grandstream and many others. Features, complexity, durability and of course price all will factor in to your decision.  

--- I would have recommended you walk the AstriCom 2013 show floor, but it closed to day.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Voice Over IP

From novice to tech pro — start learning today.