As I write this in 2021, you would think that SIP interoperability would be a solved problem, but sadly that’s not the case. In this document we’ll be sharing the configuration we’ve used to build a SIP trunk between a Metaswitch and a 3CX PBX. As an aside, we decided to experiment with a virtual… Continue Reading
Technical
988 Suicide Hotline and 7D local dialing
In October 2020 President Trump signed the Suicide Hotline Act, putting into law a plan the FCC already had in motion to designate 988 as a nationwide phone number for a national suicide prevention and mental health crisis hotline. I wrote briefly about this when the FCC first proposed the idea, and concluded that this… Continue Reading
5 translations best practices for a reliable network
How often do you have to update your switch translations or routing? Among our clients this varies from “every week” to “once or twice a year” – and every time a change is made there’s a risk of impacting service. With any network wide change you need to strike a balance between operating efficiently and… Continue Reading
Dynamic Peer Routing in the Perimeta SBC
Perimeta has a feature named dynamic peer routing which allows the Perimeta to automatically select the correct adjacency for an outbound call based on the destination IP address. Before this existed, you needed to update the call policy set every time you add a new PBX / SIP trunk, which could become tiresome really quickly…. Continue Reading
833 toll-free numbers: adding to your Metaswitch
A few months ago the FCC announced that it will be opening up a new 833 toll-free number block and that these numbers will actually be auctioned off – which is something new that hasn’t been tried before. I’d like to own 833-SIX-PACK if anyone wants to donate it. Maybe that would inspire me to… Continue Reading
Extra alarms for 911 call failures
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