Randy Weinberger
How to Find the Timezone of a Phone Number

Determine the timezone of phone numbers using Scout.

How to Find the Timezone of a Phone Number
Randy Weinberger
How to Build Least Cost Routing (LCR) in the ...

Least Cost Routing is simple in theory, but leaves out many of the complexities that are involved with actually implementing LCR in the real world.

How to Build Least Cost Routing (LCR) in the Real Word
Tutorial
Randy Weinberger
Simple Rate Limiting on OpenSIPs using Redis

How to Limit Calls Per Second on OpenSIPs

Tutorial
Randy Weinberger
How we used OpenSIPS to stop fraudulent and ...

It's easy to add a maximum duration to calls with openSIPS.

Product Updates
Randy Weinberger
Rating Calls in Real Time on a Sansay VSXi

RouteNGN allows users to inject real-time rating information into SIP messages.

Rants