Testing Mobile Networks with Remote Test Phones
Nick Using Android's development features to allow remote control of a UE in the field for testing the cellular network.
2022
CGrateS in Baby Steps – Part 3 – RatingProfiles & RatingPlans
Finally rating a call end-to-end with CGrates!
CGrateS in Baby Steps – Part 2 – Adding Rates and Destinations through the API
CGRates in Baby Steps - Part 2 - Introduction to the CGrates API
CGrates – FreeSWITCH Interaction
Linking FreeSWITCH and CGrates for realtime credit control and billing
MMS Deep Dive – MM1 – Mobile Terminated MMS
Second part in our MMS series, in this one we look at Mobile Terminated MMS.
Kamailio I-CSCF – SRV Lookup Behaviour
Recently I had a strange issue I thought I’d share. Using Kamailio as an Interrogating-CSCF, Kamailio was getting the S-CSCF details from the User-Authorization-Answer’s “Server-Name” (602) AVP. The value was…
Kamailio Bytes – Extracting SDP Parameters with Kamailio
Extracting SDP Parameters with Kamailio
Sending SMS with an alphanumeric String as the Source
If you’ve ever received an SMS from your operator, and the sender was the Operator name for example, you may be left wondering how it’s done. In IMS you’d think…
FreeSWITCH mod_python3 – Python Dialplans
Using Python3 inside the FreeSWITCH Dialplan
Scratch’n’Sniff – An easy tool for remote Packet Captures
A new tool I've written to stream packets from one machine to another for analysis in real time.
Fixing Wireshark / TCPdump pcap: network type 276 unknown or unsupported Error
Ubuntu 20.04 repos have a fairly outdated release of Wireshark, and the other day when trying to open a packet capture I got the below error: After doing an apt-get…
FreeSWITCH – Incompatible Destination
A quick look at a possible cause for "INCOMPATIBLE DESTINATION" errors in FreeSWITCH.
Kamailio, IMS & DNS Headches
A quick post on a lesson that took me a while to learn with DNS, Kamailio and IMS.
FreeSWITCH, Kamailio & IMS Extensions
Bad Extension is nothing to do with the Dialplan...
CGrates in Baby Steps – Part 1
Getting started with CGrateS to bill for calls in a Telecom environment.
MMS Deep Dive – MM1 – Mobile Originated MMS
A deep dive into Mobile Originated MMS via the MM1 Interface
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…
Querying CouchDB with Python
Searching with CouchDB in Python
2022 Telecom Reading List
The #Telecom reading list for this year; including books on Submarine Cable Systems, the history of Cable & Wireless, Alcatel Lucent's downfall and SS7.
Demystifying SS7 & Sigtran – Part 5 – What layer to Split
A look at taking SS7 traffic and putting it onto IP / SIGTRAN links on the MTP2 / Layer 2 level.