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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.

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등록일 :
2017.08.29
11:29:22 (*.160.88.18)
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http://webs.co.kr/index.php?document_srl=3311338&act=trackback&key=088
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http://webs.co.kr/index.php?document_srl=3311338
List of Articles
번호 제목 글쓴이 날짜 조회 수
160 Busy Lamp Field (BLF) feature on Opensips 2.4.0 with Zoiper configuration admin 2018-05-29 523
159 Documentation -> Tutorials -> WebSocket Transport using OpenSIPS admin 2018-05-17 502
158 List of SIP response codes admin 2017-12-20 1940
157 opensips/modules/event_routing/ Push Notification Call pickup admin 2017-12-20 1660
156 opensips push notification How to detail file admin 2017-12-20 1585
155 OpenSIPS routing logic admin 2017-12-12 1667
154 OpenSIPS example configuration admin 2017-12-12 1592
153 opensips log output admin 2017-12-11 1583
152 opensips complete configuration example admin 2017-12-10 1679
151 Opensips1.6 ebook detail configuration and SIP signal and NAT etc file admin 2017-12-10 1748
150 dictionary.opensips radius admin 2017-12-09 2347
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144 opensips exec module admin 2017-12-08 2396
143 opensips push notification How to admin 2017-12-07 2314
142 OpenSIPS Module Interface admin 2017-12-07 2375
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139 Documentation -> Tutorials -> TLS opensips.cfg admin 2017-09-14 3313
138 Using TLS in OpenSIPS v2.2.x admin 2017-09-14 3243
137 opensips tls cfg admin 2017-09-14 3439
136 How to setup a Jabber / XMPP server on Debian 8 (jessie) using ejabberd admin 2017-09-13 3683
135 SIP to XMPP Gateway + SIP Presence Server opensips admin 2017-09-13 3312
134 OpenSIPS command line tricks admin 2017-09-13 3267
133 Fail2Ban Freeswitch How to secure admin 2017-09-12 3398
132 opensips.cfg. sample admin 2017-09-12 3252
131 Advanced SIP scenarios with Event-based-Routing admin 2017-09-11 3374
130 PUSH SERVER 푸시서버 안드로이드 애플 admin 2017-09-11 3592
129 오픈소스 (사내)메신저 서버 구축, 오픈 파이어(openfire) 설치방법과 세팅(리눅스 기준) admin 2017-09-09 5920
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127 WebSocket Transport using OpenSIPS configuration 웹 소켓 컨피그레이션 기본 admin 2017-09-06 3357
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124 Installing RTPEngine on Ubuntu 14.04 admin 2017-09-05 3518
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110 JsSIP: The JavaScript SIP Library admin 2017-09-01 3612
109 WebSocket Transport using OpenSIPS admin 2017-09-01 3698
» A2Billing and OpenSIPS – Part 1 admin 2017-08-29 3599
107 A2Billing and OpenSIPS – Part 2 admin 2017-08-29 3573
106 A2Billing and OpenSIPS – Part 3 admin 2017-08-29 3698
105 OpenSIPS 2.3 philosophy admin 2017-08-17 4039
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30 Building Telephony Systems with OpenSIPS 1.6 books file admin 2014-03-06 21448
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28 How to install OpenSIPS on CentOS Debian etc admin 2014-03-05 20814
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