Using FreeSWITCH as an IMS Application Server
A brief look at International Signaling Point Code numbering and what it all means.
Getting from Point Code A to Point Code Z.
Setting up our GNS3 environment with a bunch of SS7 Nodes
Looking at the basic components that make up our SS7 Networks.
Taking a look at the basics of the SS7 Protocol Stack.
Quick reference guide for the types and capacities of Huawei BBU 3900 Series cards
A look at how Dedicated Bearers get established for VoLTE.
A look at attack vectors the NRF opens up in #5G Core networks, and the mitigations recommended by 3GPP.
Looking for Love in the 5G Core?
Let’s look at our matchmaker – The Network Repository Function in 5G Core.
A look at how characters are encoded in an SMS.
How to backup and restore Open5Gs config between servers
How GTP is extended in 5G Core Networks to support extra QoS functionality like Reflective QoS and Delay Indicators
Another deep dive into deceptively simple seeming functions to do with SMS.
5GC includes native support for framed-routing.
A great new feature of #5G Core Networks is Reflective QoS – Where QoS of the traffic coming to a UE is reflected on the QoS coming out.
The first SMS was sent in 1993, and all these years later as 5G rolls out, we’re still supporting it.
There’s no such thing as a free lunch, and 5G is the same – services running through a 5G Standalone core need to be billed. In 5G Core Networks, the SMF (Session Management Function) reaches out to the CHF (Charging Function) to perform online charging, via the Nchf_ConvergedCharging Service Based Interface (aka reference point). Like … Continue reading 5G Online Charging with the Nchf_ConvergedCharging SBI
A look at Centralized vs DeCentralized Online Charging with the aid of sugar.
After headaches importing elevation (DEM) data into Forsk Atoll, I found a better mechanism for converting them, I’d been having issues with as soon as the elevation passed 255 meters, resetting to 0 in the PNG as it didn’t understand values beyond this. I was able to open the elevation data in GlobalMapper (You can … Continue reading Converting Elevation Data (DEM) for Forsk Atoll