Taking a look at the basics of the SS7 Protocol Stack.
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Huawei Baseband Cheat Sheet
Quick reference guide for the types and capacities of Huawei BBU 3900 Series cards
To support Dedicated Bearers we first have to have a way of profiling the traffic, to classify the traffic as being the type we want to provide the Dedicated Bearer for. The first step involves a request from an Application Function (AF) to the PCRF via the Rx interface. The most common type of AF […]
Some tricks to handle if you’ve got multiple headers all with the same name in Kamailio
Quick intro to setting up Wireguard interfaces in Mirktok’s RouterOS.
Through fs_cli you can orignate calls from FreeSWITCH. At the CLI you can use the originate command to start a call, this can be used for everything from scheduled wake up calls, outbound call centers, to war dialing. For example, what I’m using: originate sofia/external/[email protected]:5061 61399999995 XML default originate is the command on the FS_CLI […]
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?
Are you a lonely UDM from MCC 001 MNC 001, just looking for a connection?
PLMN 901/70, NRF, seeks same.
Let’s look at our matchmaker – The Network Repository Function in 5G Core.
A look at how characters are encoded in an SMS.
Importing .msi antennas radiation patterns into Atoll
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Backing up and Restoring Open5GS
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.
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Framed Routing in 5G
5GC includes native support for framed-routing.
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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.
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 growing demand, and while there was vacant land around the current building, it wasn’t large enough to build on with the current building slap-dab in […]
Using the Rtimer module and UAC to be annoying, or very useful.
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SMS in 5GC
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 […]
A look at Centralized vs DeCentralized Online Charging with the aid of sugar.