This is a topic I really struggled to understand. When I was testing data balances I’d find CGrateS OOM killed by the OS when trying to charge for data usage: So what was going on? Well CGrateS deducts for each incriment in the usage, and in my case, a usage of 107374182 meant CGrateS was … Continue reading RatingSubject in CGrateS→| Nick vs Networking
Poking around in Android the other day I found this nugget in Carrier Config manager; a flag (KEY_INFLATE_SIGNAL_STRENGTH_BOOL) to always report the signal strength to the user as one bar higher than it really is. It’s not documented in the Android docs, but it’s there in the source available for any operator to use. Notably … Continue reading Simple trick to increase coverage: Lying to users about signal strength→| Nick vs Networking
This was a fun one. We were testing international roaming for a customer, roaming into the US where one of our team members (shoutout to Cody) is based. So we sent Cody some SIMs and asked them to run the basic tests for us, but no IMS APN would attach. We’d get them to power … Continue reading Tales from the Trenches – Missing Create Session Requests on IMS APN while Roaming→| Nick vs Networking
Recently I’ve been playing with creating UPPs – Unprotected Profile Packages – The “profile” that gets loaded onto eSIMs. While that’s worthy of a post itself, for testing I’ve found it really convenient to be able to “explore” the created SIM profile in PySIM, Gemalto Card Admin, etc, and check the behavior in a real … Continue reading Loading eSIMs onto Physical Cards→| Nick vs Networking
The Network Repository Function is essentially a database used to store/query information about NFs on the network.| Nick vs Networking
Running Android under the hood and very hackable!| Nick vs Networking
So we’ve found this scenario that occurs on some Samsung UEs, in certain radio contions, where midway through an otherwise normal voice call, the UE sends “mystery” data (Not IP data), which in turn causes the UPF to send the error indication and drop the bearer, which in turn drops the call.| Nick vs Networking
The UE Authentication Service is consumed by the AMF. The AMF initiates the authentication operation, when indicated, as part of the UE registration process. The AUSF performs either 5G-AKA or EAP-based authentication based on information received from the AMF. If EAP authentication is used then the AUSF and the UE exchange EAP messages through the … Continue reading Authentication in 5GC – Nausf-auth→| Nick vs Networking
Polarization Basics| Nick vs Networking
An Intellyx Brain Candy Brief Enterprises rely on their communications systems more than ever. Ecommerce continuously grows as more and more people use [...]| intellyx.com
Learn what's new in Wi-Fi 6E in comparison to Wi-Fi 6 and how it can boost performance and security in enterprise wireless!| Grandmetric
