Backing up and Restoring Open5GS
Nick How to backup and restore Open5Gs config between servers
2021
GTP Extension Headers (PDU session user plane protocol) in 5GC
How GTP is extended in 5G Core Networks to support extra QoS functionality like Reflective QoS and Delay Indicators
The Surprisingly Complicated World of SMS: Concatenated / Multipart SMS
Another deep dive into deceptively simple seeming functions to do with SMS.
Framed Routing in 5G
5GC includes native support for framed-routing.
Reflective QoS in 5G
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.
When moving the telephone exchange is easier than moving the lines within it…
Relocating vast numbers of subscriber lines is something to be avoided. In 1929 Indiana Bell realized they needed a larger telephone exchange (“CO” to use the US term) to meet…
Kamailio Bytes – Using Rtimer to run Jobs
Using the Rtimer module and UAC to be annoying, or very useful.
SMS in 5GC
The first SMS was sent in 1993, and all these years later as 5G rolls out, we're still supporting it.
5G Online Charging with the Nchf_ConvergedCharging SBI
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…
Jaffa Cakes explain the nuances between Centralized vs Decentralized Online Charging in 3GPP Networks
A look at Centralized vs DeCentralized Online Charging with the aid of sugar.
Converting Elevation Data (DEM) for Forsk Atoll
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,…
EIR in 5G Networks (N5g-eir_EquipmentIdentityCheck)
A look at the Equipment Identity Register in 5G Core
Basics of EPC/LTE Online Charging (OCS)
A glimpse into the complexities of prepaid billing (Online Charging) Diameter based networks.
HTTP PUT call recordings from FreeSWITCH
Using mod_httpapi to HTTP POST call recordings to a remote server
Open5GS without NAT
Setting up Open5Gs without a NAT requirement, and the routing required to do so.
ENUM in Practice with Kamailio
Using ENUM to resolve E.164 numbers into SIP URIs using Kamailio.
Diameter – Insert Subscriber Data Request / Response
A look at how the HSS can update the profile of an already in-use subscription using Insert Subscriber Data Request/Response.
PS Data Off
How turning mobile data off, doesn't, in LTE and 5G.
Remember Bash History Forever
A few .bashrc tweaks to improve the 'history' command
The Anti-Digit Dialing League
The strange history and triumphs of a group formed to protest the removal of letters from the dialing plan.