Categories
EPC IMS / VoLTE LTE Mobile Networks SDM Software

Diameter Routing Agents – Part 3 – Building a DRA with FreeDiameter

Using FreeDiameter as a DRA

Categories
Mobile Networks SDM Software VoIP

Cisco ITP / SS7 STP – Viewing MTP3 traffic from TDM Links

Okay, so a little late to the party on this one… The other day I had to setup a TDM (E1) based SS7 link (oh yes my friend – they still exist) to interconnect with another operator. I’m using Cisco’s ITP product as the STP / Signaling Gateway, and my trusty port mirror for what’s […]

Categories
Asterisk FreeSWITCH IMS / VoLTE Software VoIP

Sangoma Transcoding Cards Setup

Updated documentation for managing D150 transcoding cards

Categories
CGrateS Mobile Networks SDM Software VoIP

CGrateS in Baby Steps – Part 4 – Rating Calls

In our last few posts we got CGrateS setup in order to have rates and tariffs in the system, so we can price a call. Where we ended we were able to use the APIerSv1.GetCost method to get the cost of a call, and today, we’re going to actually create some rated CDRs. So again […]

Categories
IMS / VoLTE LTE Mobile Networks Software

Testing Mobile Networks with Remote Test Phones

Using Android’s development features to allow remote control of a UE in the field for testing the cellular network.

Categories
CGrateS Mobile Networks SDM Software VoIP

CGrateS in Baby Steps – Part 3 – RatingProfiles & RatingPlans

Finally rating a call end-to-end with CGrates!

Categories
CGrateS Mobile Networks SDM Software VoIP

CGrateS in Baby Steps – Part 2 – Adding Rates and Destinations through the API

CGRates in Baby Steps – Part 2 – Introduction to the CGrates API

Categories
CGrateS FreeSWITCH Software VoIP

CGrates – FreeSWITCH Interaction

Linking FreeSWITCH and CGrates for realtime credit control and billing

Categories
Linux Python Software

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.

Categories
Linux Software

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Ubuntu 20.04 repos have a fairly outdated release of Wireshark, and the other day when trying to open a packet capture I got the below error: After doing an apt-get update && apt-get upgrade wireshark, the version of Wireshark, and the issue remained. I have compiled Wireshark from source before, but it’s a real headache, […]

Categories
CGrateS EPC IMS / VoLTE Mobile Networks Software VoIP

CGrates in Baby Steps – Part 1

Getting started with CGrateS to bill for calls in a Telecom environment.

Categories
GSM Mobile Networks SDM Software

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, […]

Categories
Software VoIP

Installing Yate from Source on Ubuntu 20.04

Build instructions for YaTE

Categories
Notes Software Uncategorized

Ubuntu Cloned VMs getting Duplicate IPs (and yes – the MAC Addresses are unique)

Short mystery regarding cloned Ubuntu VMs with different MAC Addresses being allocated the same IP Addresses by DHCP.

Categories
GSM Mobile Networks RFCs & Standards Software VoIP

Demystifying SS7 & Sigtran – Part 4 – Routing with Point Codes

Getting from Point Code A to Point Code Z.

Categories
EPC LTE Mobile Networks Python RFCs & Standards SDM Software

Telephony binary-coded decimal (TBCD) in Python with Examples

Chances are if you’re reading this, you’re trying to work out what Telephony Binary-Coded Decimal encoding is. I got you. Again I found myself staring at encoding trying to guess how it worked, reading references that looped into other references, in this case I was encoding MSISDN AVPs in Diameter. How to Encode a number […]

Categories
Software

Adding Vlans to VMware Workstation

Setting up VLANs in Workstation to allow ever-more complicated network setups.

Categories
Software

K8s multiple objects in YAML File

Defining multiple K8 objects in the same YAML file

Categories
5G SA EPC LTE Mobile Networks SDM Software

Open5Gs Database Schema Change

New database time to support slicing and a migration path for existing users.

Categories
EPC Kamailio LTE Mobile Networks SDM Software

A very unstable Diameter Routing Agent (DRA) with Kamailio

I’d been trying for some time to get Kamailio acting as a Diameter Routing Agent with mixed success, and eventually got it working, after a few changes to the codebase of the ims_diameter_server module. It is rather unstable, in that if it fails to dispatch to a Diameter peer, the whole thing comes crumbling down, […]