Ansible – Timeout on Become
Nick Increasing the SSH timeout in Ansible
2020
GSM with Osmocom: Silent SMS & Silent Calls
Depending on if you’re wearing a tin foil hat or not, silent SMS and silent calls could be a useful tool to for administering the network or a backdoor put…
S1AP – Relative Capacity (87) on MME
Functionality of eNB MME selection based on Relative Capacity IE
Viewing the SIB – The LTE System Information Block with SDRs
Using SDR hardware to view the LTE System Information Block's contents.
GSM with Osmocom: GPRS & Packet Data
So far we’ve focused on building a plain “2G” (voice and SMS only) network, which was all consumers expected twenty years ago. As the number of users accessing the internet…
GSM with Osmocom: SS7 & Sigtran
SS7 Basics and Osmo-STP as a Signaling Transfer Point
FreeSWITCH + ESL = Programmable Voice
An overview of FreeSWITCH's ESL
Open5GS EPC: SGW selection by eNodeB ID / TAC
Using the new functionality in Open5Gs to select S-GW based on TAC or eNB ID.
Diameter Dispatches – Origin-State-Id AVP
What the Origin-State-Id AVP does and how it is used to track if a Diameter peer restarts.
BaiCells USIM PLMN Issues (MCC 314 / MNC 030 vs MCC 311 / MNC 98)
Why the BaiCells PLMN changes?
Kamailio Bytes – UAC – Authenticate Outbound Calls
Using UAC module to authenticate outbound calls where you need to respond to a 401 Unauthorised Response, or a 407 Proxy Authentication required
Dumb Lesson in RF Connectors
Learning a very dumb lesson in antenna selection.
LTE UE Attach Procedures in Evolved Packet Core (EPC)
A look into the signalling messages between Network elements in an Evolved Packet Core exchanged during the Attach Procedure
NBN Skymuster Satellite Technical Overview
Technical overview of NBNCo's two LTSS (Long Term Satellite service) aka Skymuster Satellite services
Diameter and SIP: Registration-Termination-Request / Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Registration-Termination Request /…
Diameter and SIP: User-Authorization-Request/Answer
The Diameter User-Authorization-Request and User-Authorization-Answer commands are used as the first line of authorization of a user and to determine which Serving-CSCF to forward a request to.
Diameter and SIP: Server-Assignment-Request/Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Server-Assignment-Request/Answer commands are…
Diameter and SIP: Location-Info-Request / Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Location-Information-Request/Answer commands are…
Diameter and SIP: Multimedia-Authentication-Request/Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Multimedia-Authentication-Request/Answer commands are…
Connecting any 3rd Party HSS to Open5GS MME
Connecting an external / 3rd party HSS to Open5GS