OPc vs OP in SIM keys
Nick 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 ?
Mobile Networks
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,…
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
Uncomfortable Questions to ask about 5G Standalone at MWC – Part 2 – Has this Cash cow got Milk?
The case for not jumping to 5G Standalone, and instead sweating the assets you have today - Where we look at 5G's new revenue streams
Uncomfortable Questions to ask about 5G Standalone at MWC – Part 1 – Does $tandalone save $$$?
The case for not jumping to 5G Standalone, and instead sweating the assets you have today - Part 1 where we look at if there really are cost savings in…
How do you know if they’re roaming? Charging challenges in IMS for Roamers
How do you charge for SMS in VoLTE roaming scenarios?
How 5G “Slices” are purchased and activated in Android
How the Android system interacts with Network Slicing to request to purchase a new slice.
Kamailio Bytes: Stripping SIP Multipart Bodies
Using Kamailio to transform a Multipart MIME SIP Body into a plain SDP only SIP body.
Android and Emergency Calling
A quick look at how Android handles emergency calling codes from it's internal database.
Funky Connectors for Cellular
Nifty design of DC & Fibre in the same connector for Cell Sites
CGrateS – ActionTriggers
Using ActionTriggers to, well, Trigger Actions, inside CGrateS.
CGrateS – Actions & Action Plans
Getting to know what we can do with Actions and ActionPlans inside CGrateS.
Shiny things inside Cellular Diplexers
Teardown of Commscope RF Diplexers for cellular networks
CGrateS – Accounts & Balances
Understanding how Accounts and Balances fit together in CGrateS
Tales from the Trenches: mode-set in AMR
Understanding the conditionality of mode-set when included in SDP with AMR.
Tales from the Trenches – Emergency Calling when Roaming
Looking at how Emergency Calling Codes are determined when roaming.
Tales from the Trenches: The issue with Emergency Calling URNs in IMS Networks
A deep dive into issues routing Emergency Calls over VoLTE / VoNR in countries that have multiple numbers to reach emergency services.