I recently qualified as a US Soccer Referee. Which sounds very official, but in practice means that completed some online training and participated in 3 hours of in-person training. So I’ve done the training, but my practical experience is minimal. However the local soccer league is very keen to put me to work regardless, because… Continue Reading
Technical
Microsoft won’t support old, insecure SIP phones
We’ve had quite a few questions this past week because Microsoft/Metaswitch announced that EAS V9.7 will only support TLS v1.2 and above – which effectively prevents the use of a variety of older SIP phone models. If you’re not sure what this all means, you’ve come to the right place – because we don’t either!… Continue Reading
Robocall Mitigation broke my Route Verification Tests!
I think this might be the least-sexy subject line I ever wrote. Every time I send out an email I get a report from the email service (Drip) showing what percentage of recipients open the email – and I can learn from that what subjects are more (or less) interesting to you, our amazing readers… Continue Reading
It is a capital mistake to theorize before one has data!
The very first of the Sherlock Holmes short stories is called A Scandal in Bohemia. When the story begins the great detective receives an anonymous note announcing that the writer will visit him that evening about a very important matter, and may well wear a mask. The note is only a couple of sentences, but… Continue Reading
You can copy call-policy-sets in Perimeta!
I’m a little behind the curve here, but I just discovered that since Perimeta V4.4.20 it has been possible to copy a call-policy-set in the CLI. Hallelujah! (Apparently my team has known this for a while, but I’ve not been doing much technical work myself recently.) For those who have no idea what I’m talking… Continue Reading
Taming Flippant Fluctuations in your VoIP Network
There’s no chatty preamble today, because I’ve got a puzzle for you. Are you ready? Let’s suppose that you want to build a nice redundant VoIP network, and so you deploy two Session Border Controllers in geo-diverse locations, along with a single Metaswitch CFS. These two SBCs have IP addresses 1.1.1.1 and 2.2.2.2 (because you… Continue Reading