[asterisk-biz] SIP to PSTN Hardware

[Jai Rangi]

When we talk about VoIP (I mean pure VoIP) there is no need for Digium 
cards. All the major and minor players support SIP.
I have never worked with any card. So cant say much about them.

-Jai
www.bingotelecom.com



From: Arya <arya6000 at gmail.com <mailto:arya6000 at gmail.com>>
Subject: Re: [asterisk-biz] SIP to PSTN Hardware
To: "Commercial and Business-Oriented Asterisk Discussion"
       < asterisk-biz at lists.digium.com 
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Thank you for that great explanation Jal

So I would have to use Digital PSTN lines for large installations right? I
have to see if Digital is available in the area. If I would have to use 2
Asterisk boxes would I need 2 digital PSTN lines?

On 8/5/07, Jai Rangi <jprangi at bingoconsulting.com 
<mailto:jprangi at bingoconsulting.com>> wrote:
 >
 >  Arya,
 >
 > This can be done very well with asterisk and ser/openser. Ser is very 
good in handling/distributing the load to asterisk servers.
 > The whole system can be scalable. SEE developers claims that it can 
handle of thousand's  of call at the same time. I have never tested 1000 
calls. But I believe that.
 > We have build the system with ser+asterisk+mysql. All the calls come 
on ser and then ser can forward the calls to asterisk servers in round 
robin fashion. That can also be done based on load or based on number of 
calls. The complete system is scalable. Rule of thumb is 100 
simultaneous calls per asterisk. So if you need 200 simultaneous 
channels then 2 asterisk server if need 500 channels then 5 asterisk 
boxes. Since every thing is coming from database its easy to add more 
asterisk or ser servers. Distributing load on ser will involve the 
companies who are sending traffic to you.
 >
 > Depending on the technical background, building this type of system 
can take 6-8 weeks to *forever* (I am not joking). Been there and done 
that. I am sure there are great experts is the lists. They can add their 
experience too.
 > Contact me off the list if you are planning to outsource the project. 
If you decide to do it your self then post your technical questions to 
ser mailing lists and asterisk-users mailing lists. People in the lists 
are always willing to help.
 >
 > -Jai
 > www.bingotelecom.com <http://www.bingotelecom.com>
 >
 >
 >
 > On Aug 4, 2007, at 9:18 PM, Alex Balashov wrote:
 >
 >
 >  > On Sat, 4 Aug 2007, Arya wrote:
 > >
 >
 >  >> ok thank you for the great explanation, so what would be good for
 > >> large
 > >> installations?
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