Viewing the SIB – The LTE System Information Block with SDRs
Nick Using SDR hardware to view the LTE System Information Block's contents.
July 2020
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