[OpenSIPS-Users] [NEW] Mid-registrar: scalable registration and call forking

Liviu Chircu liviu at opensips.org
Tue Dec 20 09:33:02 EST 2016

Hi all,

The new */mid-registrar/*functionality is now available with OpenSIPS 
2.3 (current development branch)!
What is a mid-registrar?*

The/mid-registrar/is a mid-component of a SIP platform, designed to work 
between end users and the platform's main registration component. It 
opens up new possibilities for leveraging existing infrastructure in 
order to continue to grow (as subscribers and as registration traffic) 
while keeping an existing low-resources registrar server.

*What can a mid-registrar help with?*

Acting as a registration front-end to the main SIP registrar, the 
OpenSIPS/mid-registrar/is able to:*

     * Convert incoming high*-rate registration traffic into a low-rate 
variant, towards the main registrar layer. With proper configuration, it 
can absorb over 90% of existing registration traffic while preserving 
the back-end's user location state, effectively reducing resource usage 
at the respective layer.*

     * Add support for parallel calling*(registration based) to 
registrar servers which are not able to provide such functionality; The 
OpenSIPS mid-registrar can aggregate all the registered contacts from 
the same user (AOR) and push forward to the main registrar a single 
registration per AOR. On the way back, from the main registrar, an 
incoming call will be parallel forked to all registered contacts of the 

*How to use the OpenSIPS mid-registrar?*

A comprehensive tutorial 
available, explaining how the OpenSIPS mid-registrar can be used and how 
it works.

For more details on configuration options and available functions, see 
theREADME file 
the module.

Liviu Chircu
OpenSIPS Developer

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