A quick look at a possible cause for “INCOMPATIBLE DESTINATION” errors in FreeSWITCH.
Category: Mobile Networks
A quick post on a lesson that took me a while to learn with DNS, Kamailio and IMS.
Bad Extension is nothing to do with the Dialplan…
Getting started with CGrateS to bill for calls in a Telecom environment.
A deep dive into Mobile Originated MMS via the MM1 Interface
Categories
USSD Gateway with Osmocom
Unstructured Supplementary Service Data or “USSD” is the stack used in Cellular Networks to offer interactive text based menus and systems to Subscribers. If you remember topping up your mobile phone credit via a text menu on your flip phone, there’s a good chance that was USSD*. For a period, USSD Services provided Sporting Scores, […]
A look at taking SS7 traffic and putting it onto IP / SIGTRAN links on the MTP2 / Layer 2 level.
This post is one of a series of packet capture analysis challenges designed to test your ability to understand what is going on in a network from packet captures.Download the Packet Capture and see how many of the questions you can answer from the attached packet capture. The answers are at the bottom of this […]
Quirks and gotchas of working with SMS on IMS on iPhones.
Using FreeSWITCH as an IMS Application Server
A brief look at International Signaling Point Code numbering and what it all means.
Getting from Point Code A to Point Code Z.
Setting up our GNS3 environment with a bunch of SS7 Nodes
Looking at the basic components that make up our SS7 Networks.
Taking a look at the basics of the SS7 Protocol Stack.
Categories
Huawei Baseband Cheat Sheet
Quick reference guide for the types and capacities of Huawei BBU 3900 Series cards
A look at how Dedicated Bearers get established for VoLTE.
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?
Let’s look at our matchmaker – The Network Repository Function in 5G Core.
A look at how characters are encoded in an SMS.