Re: OT: VOIP Implementation

Malik,

Are you in USA? The over all setup is pretty straight forward:

Hardware: Dell 2650 - DUAL 2.4 CPU, 4-GB RAM, 2x 73GB Hard drives in RAID-1
(you may need more storage depending on how many voicemails you want to save
and for how long) - We plan on clustering this server.

Software: Asterisk - Its a linux based open source product.

Network: 3750Gs, 2821, T1 Connection

IP Phones: 7940/7960, we use soft IP phones like "X-lite" for overseas
employees and contractors (middle east, pakistan, europe) as they only
connect during meetings, etc.

2x IP telephony providers (so you will have two trunks on your asterisk
server, probably SIP trunks. Each trunk comes with 4 lines, and we are using
two different providers for each trunk. When you make a call from inside
your network, the call goes over the trunk, and then to the party you are
calling and call from outside comes to your IP telephony provider, over the
trunk to your server)

Initially, asterisk can be a pain in the ass to setup, even with the GUI
interface but we rolled one SIP trunk, test system in about 3 weeks and by
6th week we were on 2nd trunk SIP with phone deployed, people making calls
for business. We will use this system for around 100 users but not all 100
users are going to be online, connected making calls at any given time in a
day.

I can unicast you a diagram of the setup but it looks similar to this:
http://www.voip-info.org/storage/users/755/19755/images/62/Setting%20up%20your%20router-firewall%20so%20Asterisk@Home%20can%20communicate%20with%20a%20VOIP%20Provider%20via%20SIP%20through%20a%20NAT.gif

I had issues running the server/SIP trunks behind a firewall, maybe its NAT
- I don't know but a slightly different setup took care of that problem.

I hope this helps.

Thanks,

Haroon

On Fri, May 15, 2009 at 10:05 AM, S Malik <ccie.09_at_gmail.com> wrote:

> I have around 150 users who may use this system at this time. I just
> wanted to get my self acquainted with the system and required items
> (devices+software etc involved) before I reach any re-seller.
>
>
>
> On Fri, May 15, 2009 at 12:54 AM, Nick Matthews <matthn_at_gmail.com> wrote:
>
>> Maybe I don't understand quite right, but how are 20 users going to
>> fill up four PRIs?
>>
>> Even with 50 users that assumes that this is a call center and they're
>> going to be on the phone 100% of the time? That makes more sense..
>>
>> You can use CME on an ISR with more than 100 users. Something like a
>> 3800 with some IP phones, DSPs, CUE, and VWICs would get you going.
>> This is more dependent on what type of redundancy and growth you're
>> planning on.
>>
>>
>> -nick
>>
>> On Thu, May 14, 2009 at 11:09 PM, S Malik <ccie.09_at_gmail.com> wrote:
>> > What a wonderful forum, I love it. So many responses and suggestions.
>> Folks,
>> > I appreciate that you all took time to answer my queries.
>> >
>> >
>> > On Thu, May 14, 2009 at 6:51 PM, ALL From_NJ <all.from.nj_at_gmail.com>
>> wrote:
>> >
>> >> If going with open source, also consider the Linksys phones - SPA962,
>> these
>> >> rock. They are very good and work nice with SIP. Nice color screens,
>> 6
>> >> lines, poe, etc ...
>> >>
>> >> You can also look at UC520s for your install. These support a single
>> T1
>> >> each, so you will need an ISR to handle the 4 PRIs at your main site
>> ... you
>> >> might be best to simply look at CME and consider this.
>> >>
>> >> If you know your Cisco SE, tell them to get you a quote, this would
>> give
>> >> you something to work from. There is often more to all of this than
>> the
>> >> simple numbers in these emails ... management platforms, speech to
>> text, 3rd
>> >> party support like IPCelerate, etc ...
>> >>
>> >> Good luck and let us know what you choose!
>> >>
>> >>
>> >>
>> >> On Thu, May 14, 2009 at 6:11 PM, Haroon <itguy.pro_at_gmail.com> wrote:
>> >>
>> >>> Ryan, your right. But if companies can use open source products to
>> save
>> >>> some
>> >>> dough, why not? With 20 users, we have not had any major issues but
>> things
>> >>> can change drastically if you are talking 100, 200 or 1000+ users.
>> >>>
>> >>> On Thu, May 14, 2009 at 6:04 PM, Ryan West <rwest_at_zyedge.com> wrote:
>> >>>
>> >>> > 7940s are only grey market and you're comparing an install base of
>> 20
>> >>> > to that of 4 pri's which could handle almost 500 depending on bdbh
>> and
>> >>> > blocking level. I would hope that an install base like that might
>> >>> > include some redundancy too. My original point is to expect to pay a
>> >>> > lot for a cucm install to support that many people. Even lower end
>> >>> > 7941's are gonna cost a lot if you to several hundred.
>> >>> >
>> >>> > Sent from handheld.
>> >>> >
>> >>> > On May 14, 2009, at 5:52 PM, "Haroon" <itguy.pro_at_gmail.com> wrote:
>> >>> >
>> >>> > > 20 but it will soon grow to about 50 users at one location and
>> adding
>> >>> > > another 30 from remote offices...which will require more
>> bandwidth.
>> >>> > >
>> >>> > > On Thu, May 14, 2009 at 5:48 PM, Ryan West <rwest_at_zyedge.com>
>> wrote:
>> >>> > >
>> >>> > >> How many users?
>> >>> > >>
>> >>> > >> Sent from handheld.
>> >>> > >>
>> >>> > >> On May 14, 2009, at 5:47 PM, "Haroon" <itguy.pro_at_gmail.com>
>> wrote:
>> >>> > >>
>> >>> > >> $150k? Thats crazy.
>> >>> > >>
>> >>> > >> What is your budget? Do you want to go all cisco or are you open
>> to
>> >>> > >> ideas?
>> >>> > >> We just implemented asterisk based solution with cisco phones
>> >>> > >> (7940s), and
>> >>> > >> couple of trunks to voip provider for PSTN and external calls...
>> >>> > >> extremely
>> >>> > >> cheap and now two companies are using it for their small
>> admissions
>> >>> > >> departments , calling globally.
>> >>> > >>
>> >>> > >> We did invest in few 3750Gs and 2800 series routers, the VOIP
>> runs
>> >>> > >> off
>> >>> > >> 2821s going through the existing T1.
>> >>> > >>
>> >>> > >> Before going with this solution, we check out cisco and avaya
>> based
>> >>> > >> solutions, it wasn't worth it and we were not ready to spend 20k
>> or
>> >>> > >> 40k on
>> >>> > >> just VOIP solution.
>> >>> > >>
>> >>> > >> Haroon
>> >>> > >>
>> >>> > >> On Thu, May 14, 2009 at 5:37 PM, Ryan West < <rwest_at_zyedge.com>
>> >>> > >> rwest_at_zyedge.com> wrote:
>> >>> > >>
>> >>> > >>> 4 pris with uc, after phones, routers, dlus, cards, switches. I
>> >>> > >>> think
>> >>> > >>> you would be lucky to be under 150k. But you'll probably need
>> to
>> >>> > >>> provide more information, a lot more.
>> >>> > >>>
>> >>> > >>> Sent from handheld.
>> >>> > >>>
>> >>> > >>> On May 14, 2009, at 5:28 PM, "S Malik" < <ccie.09_at_gmail.com>
>> >>> > >>> ccie.09_at_gmail.com> wrote:
>> >>> > >>>
>> >>> > >>>> Can any one tell me what items will I need to implement a VOIP
>> >>> > >>>> solution in
>> >>> > >>>> an office for four PRIs.
>> >>> > >>>>
>> >>> > >>>> I like to know items like " CUCM or CUCC" etc.
>> >>> > >>>>
>> >>> > >>>> Any one has any idea on approximate cost on it please?
>> >>> > >>>>
>> >>> > >>>>
>> >>> > >>>> Blogs and organic groups at <http://www.ccie.net>http://
>> >>> > >>>> www.ccie.net
>> >>> > >>>>
>> >>> > >>>>
>> >>> >
>> _______________________________________________________________________
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>> >>
>> >> --
>> >> Andrew Lee Lissitz
>> >> all.from.nj_at_gmail.com
>> >
>> >
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Received on Fri May 15 2009 - 10:44:40 ART