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uk.telecom.voip (UK VOIP) (uk.telecom.voip) Discussion of topics relevant to packet based voice technologies including Voice over IP (VoIP), Fax over IP (FoIP), Voice over Frame Relay (VoFR), Voice over Broadband (VoB) and Voice on the Net (VoN) as well as service providers, hardware and software for use with these technologies. Advertising is not allowed.

Which SIP gateway?



 
 
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  #1  
Old February 13th 06, 04:04 PM posted to uk.telecom.voip
Martin Lukasik
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Posts: 27
Default Which SIP gateway?

I am considering buying some "big buddy", which can do minimum 400-500
concurrent calls.
And I wonder... would it be better to buy something like Cisco or maybe use
Asterisk?
I can buy a server with 4, 8 or 12 processors, it's not a problem, but just
wonder how it would work.

What would you go for?
I know few VoIP providers using Asterisk, I know few using Cisco, I know one
using sysmaster.
Nobody wants to share any information... maybe here someone will help.

Thanks in advance,
Martin


  #2  
Old February 13th 06, 05:04 PM posted to uk.telecom.voip
Peter Corlett
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Posts: 52
Default Which SIP gateway?

Martin Lukasik wrote:
I am considering buying some "big buddy", which can do minimum 400-500
concurrent calls. And I wonder... would it be better to buy something like
Cisco or maybe use Asterisk? I can buy a server with 4, 8 or 12
processors, it's not a problem, but just wonder how it would work.


You don't want one big server, you want loads of small servers so that you
don't go completely off the air if there's a hardware failure.

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  #3  
Old February 13th 06, 05:18 PM posted to uk.telecom.voip
Martin Lukasik
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Posts: 27
Default Which SIP gateway?

You don't want one big server, you want loads of small servers so that you
don't go completely off the air if there's a hardware failure.


Okay, okay, let's not talk about the obvious things. I DO KNOW that.
Backup will be in place. Saying "big buddy" I meant something able to handle
MANY SIP connections at the same time.

But the thing is -- which way to go...

m.


  #4  
Old February 13th 06, 10:29 PM posted to uk.telecom.voip
alexd
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Posts: 331
Default Which SIP gateway?

Martin Lukasik wrote:

I am considering buying some "big buddy", which can do minimum 400-500
concurrent calls. And I wonder... would it be better to buy something like
Cisco or maybe use Asterisk?


Depends where your expertise lies - if you've been herding Ciscos for many
years and you have a good relationship with your Cisco vendor [and plenty
of $ for that matter], that would make most sense. However, if you dream
kernel .configs in your sleep, then use asterisk.

How you configure asterisk for a large number of users depends on the
topology of your network; if they're all on a LAN [or VPN under your
control], using REINVITEs on the SIP clients will take alot of the load off
your asterisk server [or any other SIP server for that matter]. On the
other hand, if you're thinking of having random members of the public
connecting [ie a Sipgate-style scenario], then it would probably make sense
to have SER handling some of the load on the front end [as NATed random
internet clients can't REINVITE and most - if not all - the audio streams
would end up going through your Asterisk servers], and asterisk servers on
the back end via some sort of round-robin DNS arrangement.

Two key points:
- If you use asterisk with a large number of users, SQL is the best place to
store config details
- If you stick to open protocols like SIP, you should be able to use any kit
with any other, and avoid getting locked in with any particular vendor.


I can buy a server with 4, 8 or 12 processors, it's not a problem, but
just wonder how it would work.


I reckon a rack full of dual core machines would be a better bet than one or
two massive systems with many processors.

What would you go for?
I know few VoIP providers using Asterisk, I know few using Cisco, I know
one using sysmaster.
Nobody wants to share any information... maybe here someone will help.


Yes they do - lurk on the asterisk-users mailing list, for starters. Even
with a few commodity PCs, you could get a pretty serious test system up and
running with Asterisk and SER, without too much outlay.

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  #5  
Old February 16th 06, 09:59 PM posted to uk.telecom.voip
Chris Hills
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Posts: 96
Default Which SIP gateway?

Martin Lukasik wrote:
What would you go for?
I know few VoIP providers using Asterisk, I know few using Cisco, I know one
using sysmaster.
Nobody wants to share any information... maybe here someone will help.


Martin

The most popular combination seems to be Cisco 2600/3600/3700 series
with NM-[12]CE1x, and CCM or Asterisk for call routing. There are many
large institutions in academia that do this. However, Nortel is becoming
more and more popular.

Regards

Chris
 




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