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https://sysadminman.net/blog/2013/a2billing-and-opensips-part-1-4775


This is to confirm that SysAdminMan no longer offers FreePBX or A2Billing hosting.There were a few reasons for this decision but one of that main ones was, in my opinion, Sangoma’s aggressive commercialisation of FreePBX and their “FreePBX” trademark. It did not make commercial sense to continue building a business under these circumstances.According to Google Analytics there are still a couple of thousand visitors a week that use the site, so I will leave it here, but will not be adding new guides or tips.


This is part 1 of a 3 part post discussing A2Billing and OpenSIPS. A2Billing is a billing platform for Asterisk, and OpenSIPS is an Open Source SIP Server. In this first part I’m going to talk about what OpenSIPS is and why you may want to use it. In the second part I’ll talk about some prerequisites for the setup I’m going to show, and in the third part will be the OpenSIPS config.

A2Billing works perfectly well without OpenSIPS, so why would you want to use them together? Well, with OpenSIPS sitting in front of A2Billing/Asterisk and handling all of the SIP connections it can provide the following benefits –

  • load balance across multiple Asterisk/A2Billing servers
  • failover – take an Asterisk server out of the cluster if it should fail
  • limit SIP connections so that only the OpenSIPS server talks to Asterisk/A2Billing over SIP
  • register all of your SIP customers in a single place – the OpenSIPS server (the config I show is not going to cover SIP registrations)
  • OpenSIPS has much better logging of SIP connections (than Asterisk) so we can use fail2ban more efficiently to block attacks

There are probably many more benefits than those listed above. OpenSIPS has lots of modules that provide flexibility to handle the SIP connections exactly as you need.

In the config that follows I am going to show how to do SIP termination. SIP clients authenticate to OpenSIPS using either IP or USER/SECRET authentication and then calls are passed to A2Billing/Asterisk for completion. This example does not cover SIP registrations or incoming DID numbers.

OpenSIPS will sit between the A2Billing SIP customers and the A2Billing/Asterisk server. All customer SIP connections will be to the OpenSIPS server, which will then pass these on to Asterisk/A2Billing once authenticated. A2Billing/Asterisk will talk to the call provider directly (not via OpenSIPS). So the setup looks something like this –

A2Billing SIP Customer  -->  OpenSIPS  -->  A2Billing/Asterisk  --> Call provider
                                       -->  A2Billing/Asterisk  --> Call provider
                                       -->  A2Billing/Asterisk  --> Call provider

This diagram above shows calls going to 3 different A2Billing/Asterisk servers. In the example config there is just one set up, but it will be obvious how to add more.

Also, in OpenSIPS there are 2 different ‘load balancing’ modules. There is one called ‘dispatcher’ which in unintelligent and just send the calls to a group of A2Billing/Asterisk servers. And there is a module called ‘load-balancer’ which knows the state of each A2Billing/Asterisk server and evenly distributes the load across them. For simplicity in this example I will be using the ‘dispatcher’ module.

This guide assumes that you have –

  • a working A2Billing/Asterisk server in place
  • a working OpenSIPS v1.8 server in place
  • created a database called ‘opensips’ (as per the OpenSIPS install instructions) that is on MySQL running on the A2BIlling/Asterisk server

We are going to have both the A2Billing and OpenSIPS databases running on the A2Billing server so that we can integrate the two

In part 2 I’ll discuss some of the prerequisites and the database setup.

조회 수 :
5361
등록일 :
2017.08.29
11:29:22 (*.160.88.18)
엮인글 :
http://webs.co.kr/index.php?document_srl=3311338&act=trackback&key=199
게시글 주소 :
http://webs.co.kr/index.php?document_srl=3311338
List of Articles
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162 Opensips Gateway between SIP and SMPP messages admin 277   2019-02-19
 
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160 Busy Lamp Field (BLF) feature on Opensips 2.4.0 with Zoiper configuration admin 1999   2018-05-29
 
159 Documentation -> Tutorials -> WebSocket Transport using OpenSIPS admin 1887   2018-05-17
 
158 List of SIP response codes admin 3540   2017-12-20
 
157 opensips/modules/event_routing/ Push Notification Call pickup admin 3097   2017-12-20
 
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149 what is record_route() in opensips ? admin 4018   2017-12-09
 
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139 Documentation -> Tutorials -> TLS opensips.cfg admin 5067   2017-09-14
 
138 Using TLS in OpenSIPS v2.2.x admin 5056   2017-09-14
 
137 opensips tls cfg admin 5147   2017-09-14
 
136 How to setup a Jabber / XMPP server on Debian 8 (jessie) using ejabberd admin 5699   2017-09-13
 
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134 OpenSIPS command line tricks admin 4986   2017-09-13
 
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132 opensips.cfg. sample admin 4955   2017-09-12
 
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111 OpenSIPS 2.3 install admin 5621   2017-09-01
 
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» A2Billing and OpenSIPS – Part 1 admin 5361   2017-08-29
https://sysadminman.net/blog/2013/a2billing-and-opensips-part-1-4775 This is to confirm that SysAdminMan no longer offers FreePBX or A2Billing hosting.There were a few reasons for this decision but one of ...  
107 A2Billing and OpenSIPS – Part 2 admin 5268   2017-08-29
 
106 A2Billing and OpenSIPS – Part 3 admin 5481   2017-08-29
 
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