Hi Carlos and thanks for the advice. I agree with you wholeheartedly but I'm 
not sure if I have much choice in the matter. The system was originally 
designed to offer PBX services to private clinics and currently handles between 
10 and 20, with 70 phone numbers. The guys I work for want to expand into other 
market segments here in Denmark and my job is to re-install the system on some 
new servers and start making changes.

The code is not very well written, the original developers have totally 
misunderstood the RVM model in Rails and the Asterix config files are full of 
unused code and example code. There is also some very sloppy version control in 
the Rails/Adhearsion files and absolutely no regression testing. But, hey, it 
seems to work!

I would like to start from fresh and re-develop the system, I am not at all 
confident of being able to just lift the code from the current servers and 
copy/paste it all onto some new ones and expect it to work. Your solid advice 
might help me make the case for a fresh start, but whichever way it goes, at 
least I'll be kept busy ...

Fra: asterisk-users-boun...@lists.digium.com 
[mailto:asterisk-users-boun...@lists.digium.com] På vegne af Carlos Alvarez
Sendt: 14. december 2011 16:58
Til: Asterisk Users Mailing List - Non-Commercial Discussion
Emne: Re: [asterisk-users] A few (simple?) questions

Getting involved in an existing, and possibly broken system is the wrong way to 
start with Asterisk.  I know, because that's how my career in VoIP started.  I 
had to unlearn a lot of poor practices I learned from that system.

But anyway without prior documentation or the ability to get the original 
design intention, I think your next step is to go right back to the beginning, 
and gather the user requirements and create a design.  Then see if it was 
solved properly, or you need to start over, or what.  Without the basics I 
don't think you can answer the questions you had.  Once you know what was 
needed and why it was custom-written, you'll probably have all those answers.  
Just know that in its basic form, to process calls for a normal company, 
nothing is needed other than one Asterisk server.  Everything else is extra, 
which may or may not be warranted.  I've seen a number of deployments that 
seemed geared more towards making a very profitable complex custom system than 
just giving the customer the best value.

Asterisk is a particularly noob-unfriendly product with a lot of pitfalls and 
relatively poor documentation.  Don't go into it lightly, and always be aware 
that doing it wrong results in anything from system failures to thousands of 
dollars in toll fraud costs.

On Wed, Dec 14, 2011 at 8:38 AM, Brynjolfur Thorvardsson 
<bi...@itanet.nu<mailto:bi...@itanet.nu>> wrote:
Hi Carlos and thanks for your answer. To begin with: I am a noob in all 
telephony/asterisk/ror fields, coming from a Classic ASP/MS background! I've 
been nosing around in RoR and Asterisk for the last month or so and have 
managed to create several RoR sites and to get an Asterisk server up and 
running so me and my boss can phone each other using softphone on a smartphone.

So, yes it's going to be fun! And again, thanks for your answer.


Fra: 
asterisk-users-boun...@lists.digium.com<mailto:asterisk-users-boun...@lists.digium.com>
 
[mailto:asterisk-users-boun...@lists.digium.com<mailto:asterisk-users-boun...@lists.digium.com>]
 På vegne af Carlos Alvarez
Sendt: 14. december 2011 16:13

Til: Asterisk Users Mailing List - Non-Commercial Discussion
Emne: Re: [asterisk-users] A few (simple?) questions

On Wed, Dec 14, 2011 at 2:18 AM, Brynjolfur Thorvardsson 
<bi...@itanet.nu<mailto:bi...@itanet.nu>> wrote:

I've been saddled with recreating a running Asterisk PBX setup (with Ruby on 
Rails). Due to some wrangling between my client and the original developers I 
am not able to talk to the developers themselves but have been given full SSH 
access to their servers!

Jumping in without documentation or help when there is a questionable 
relationship between the client and developer...this should be a lot of fun.


The system offers PBX services to  ~10 small firms and connects via a SIP trunk 
to a Telecoms company.

Sounds way over-built, but since we don't know the intent of the architecture 
nor all the features expected, hard to say.

-          STUN server - is it necessary (given that there are many free STUN 
servers on the Internet), and why two?

I don't believe so.

-          Why have a separate Asterisk server for the trunk?
Can't think of any reason.

-          Is the Apache Message Queue server necessary?
"Necessary" is not something that can be answered.  In their environment as 
programmed, probably.  In general, can an Asterisk server run without it?  Yes. 
 A low-end single x86 server can easily support hundreds of endpoints and 
dozens of concurrent calls, with all Asterisk services running on a single 
server.
Do you have Asterisk expertise already?  RoR, SQL, other telephony...?


--
Carlos Alvarez
TelEvolve
602-889-3003<tel:602-889-3003>





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602-889-3003




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