I had a conversation recently with one of our clients about what alarms the Metaswitch Call Feature Server (CFS) would produce if 911 calls were failing. The simple answer is that if a trunk is out of service then that trunk would go into alarm, but later I started wondering whether we could do a… Continue Reading
Technical
How to test Perimeta routing changes
If you’re familiar with making translations changes on the Metaswitch Call Feature Server (CFS), you will likely appreciate the range of tools available to test your changes before activating them for your whole network. On the CFS, not only can you run Route Verification Tests (RVTs), but you can also assign an Overriding Config Set… Continue Reading
Geo-Redundant SBCs – how do they work?
Phone service is important. Providing reliable service can mean the difference between life and death. People don’t like risk – and they especially don’t want to be responsible for an unnecessary risk. That’s why every telecom vendor offers some kind of redundancy. Geographic vs ‘regular’ redundancy I’d define regular redundancy as the ability to maintain… Continue Reading
Visualize your Metaswitch translations with FlowShow
Back in January I made a mistake. I was talking with a client that I’ve known for many years – one of the first Metaswitch deployments I ever supported when I worked at the company – and they needed some work done on their Metaswitch translations (the rules that control call billing and routing, if… Continue Reading
Perimeta Message Manipulation: Guide for Beginners
One of the great features of the Perimeta Session Border Controller (SBC) is the powerful message manipulation framework (MMF) that it provides. Using these rules you can make almost any change you like to a SIP message as it passes through the SBC, as well as block or reject messages based on certain criteria. I’ve… Continue Reading
How to configure Twilio SIP trunking to a Metaswitch
If you’ve been reading these articles for a while, you’ll know that I’ve experimented with Twilio a couple of times, but so far I haven’t tried to actually integrate Twilio into the Metaswitch world I normally inhabit. In this article I’ll give step-by-step instructions for setting up your Metaswitch CFS, Perimeta and your Twilio account… Continue Reading