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Provisioning is the fact of letting an IP Telephone to pull its configuration form an external entity. When a telephone pulls the information, it will at least this information:

  • SIP Credential
  • Codec configuration
  • Admin access

Some other phones are more advanced and they can pull more information, such as shortcuts, display information, tunes, SIP/RTP parameters, etc.

CDR Importer is the element that allows pushing your call details into a database for a post-mortem analysis. For example, Billing.

FusionPBX as a project offers you these things. So, having a Provisioning and CDR Importer server sounds quite easy if you are talking about stand-alone deployments, but in this case, I will write about something more interesting: cluster deployment. Regardless of you have a high-availability or load-balanced cluster, there is a point where you have enough load that you need to take out non-essential VoIP functions out of the main SIP nodes to keep load and service quality at an acceptable level. Moving out of the SIP Cluster Nodes functions such as provisioning or CDR importing is one of the first steps you should do.

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Everyone knows that CentOS only takes care of some specific core packages. All others, if you want to continue using RPM's, must be used from alternative Repositories. There are many alternatives:

  • EPEL: you will find here many useful packages. Packages get updates for critical bugs.
  • Remi: you will find here backports for most useful packages. 
  • OKay: you will find here some specific packages for servers, audio, and video.

I especially do contributions to the OKay repository. So, if you want to use OKay follow these steps:

  • Install the EPEL repository, you may try typing yum install epel-release. I think at least Centos 7 has it out of the box.
  • Install the okay-release RPM. Type:
    • Centos 6 on 32 bits: rpm -ivh
    • Centos 6 on 64 bits: rpm -ivh
    • Centos 7 on 64 bits: rpm -ivh

I will post later as I publish some updates or packages.

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At some point, after running your PBX for a while, you will get some exposition. If you go to your PBX console and watch your logs, you may notice that sometimes someone tries to register or to send an INVITE signal. These tries are usually done by scripts looking for misconfigured SIP servers.