Choosing between Host Based Routing and SIP Registration

MiRTA PBX doesn't support natively SIP registration for Providers, but you can manually configure them in sip.conf

Here a simple example about a static registration in sip.conf

[general]
...
register => 49088751:cyj74rrjd8gg@sip.flowroute.com

If you want, you can also define statically the SIP provider in sip.conf and then reference them in the Admin/Providers section. Doing a static configuration should be avoided because any change in the provider configuration will require a reload, but it can be needed if a parameter not yet supported by the web interface needs to be used.

[flowroute]
type=friend
secret=cyj74rrjd8gg
defaultuser=49088751
username=49088751
fromuser=49088751
host=sip.flowroute.com
dtmfmode=rfc2833
context=fromoutside
canreinvite=yes
allow=ulaw
allow=alaw
allow=gsm
insecure=port,invite
fromdomain=sip.flowroute.com

In the web interface, you'll reference the tag in square brackets [flowroute]

Once sip.conf has been edited, to have it working, doing a sip reload is needed. Take in mind doing a sip reload will trash all clients registrations. Phones will be unavailable until new registration.

Before choosing to go with the SIP registration, please take the time to read

https://blog.flowroute.com/2014/07/09/sip-registration-vs-host-based-routing-which-side-wins/