Creating a Fixed Line IMS subscriber in PyHSS
Nick Setting up fixed-line IMS subscribers in PyHSS to authenticate softphones and non-mobile phones into your IMS.
2024
Transport Keys & A4 / K4 Keys in EPC & 5GC Networks
A look at Transport Keys and how they're used when exchanging SIM data
NB-IoT Flows for NIDD
A detailed look at how NIDD and NB-IoT flows look.
eMBMS Architecture in LTE EPC
A look at the interfaces and procedures used in eMBMS for LTE broadcast services.
CGrateS – SERVER_ERROR: unexpected end of JSON input
I started seeing this error the other day when running CDRsv1.GetCDRs on the CGrateS API: SERVER_ERROR: unexpected end of JSON input It seemed related to certain CDRs in the cdrs…
Why Emergency Calling Numbers are what they Are
A totally complete history and not just something I learned from a fellow phone nerd who's been around a lot longer than me...
Getting started with PyHSS
Setting up and installing PyHSS to act as a HSS / EIR / PCRF & Diameter server
Virtualizing VMware to run inside Proxmox
Running VMware ESXi inside Proxmox
The power of the PyHSS EIR
Using PyHSS EIR functions to report on devices, blacklist, lock and report.
OPc vs OP in SIM keys
What is the use of the OPc key to be derived from OP key ? Why can't it just be a random key like Ki ?
Importing CDRs into CGrateS with Event Reader Service
Using CGrateS to rate CSV files
Libpython3.11 problems with Kamailio on Ubuntu 22.04
I run Ubuntu on my desktop and I mess with Kamailio a lot. Recently I was doing some work with KEMI using Python, but installing the latest versions of Kamailio…
Kamailio Websocket – Allowing binding to Port 443 & Port 80
If you’re setting up Kamailio for support for WebSocket and need to bind to TCP port 80 or TCP port 443, you may run into the issue that permission is…
DNS’ role in S8-Home Routing Roaming
S8 Home Routing is a really simple concept, the traffic goes from the SGW in the visited PLMN to the PGW in the home PLMN, so the PCRF, OCS/OFCS, IMS,…
vCenter – Partition Folder Isolation
While vCenter doesn’t really do contexts / mutli-tenants / VPCs like the hyperscalers, there are simple (ish) ways to do context separation inside VMware vCenter. This means you can have…
The meaning of 3GPP-Charging-Characteristics
Down the rabbit hole of setting Charging-Characteristics encoding
Best Practices for SGW & PGW Deployment Architectures for Roaming
Our approach to distributed roaming architectures.
SMS over Diameter for Roaming SMS
Diving back into SMS transport, this time looking into using SMS over Diameter to handle SMS over NAS for roaming subs.
CGrateS – Exporting CDRs
Exporting CDRs from CGrateS