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
Mobile Networks VoIP

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.

Categories
5G SA IMS / VoLTE Kamailio LTE Mobile Networks VoIP

The Surprisingly Complicated World of SMS: Apple iPhone MT SMS

Quirks and gotchas of working with SMS on IMS on iPhones.

Categories
Software VoIP

Installing Yate from Source on Ubuntu 20.04

Build instructions for YaTE

Categories
Kamailio VoIP

Kamailio Bytes – Working with Redis

Using Redis with Kamailio

Categories
FreeSWITCH IMS / VoLTE Kamailio Mobile Networks VoIP

FreeSWITCH as an IMS Application Server

Using FreeSWITCH as an IMS Application Server

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
Mobile Networks RFCs & Standards VoIP

Demystifying SS7 & Sigtran – Part 3 – SS7 Lab in GNS3

Setting up our GNS3 environment with a bunch of SS7 Nodes

Categories
Mobile Networks RFCs & Standards VoIP

Demystifying SS7 & Sigtran (With Labs!) – Part 2 – Ingredients Needed

Looking at the basic components that make up our SS7 Networks.

Categories
Mobile Networks RFCs & Standards VoIP

Demystifying SS7 & Sigtran Networks (With Labs!) – Part 1 – Intro

Taking a look at the basics of the SS7 Protocol Stack.

Categories
Kamailio VoIP

Handling multiple SIP headers with the same name in Kamailio

Some tricks to handle if you’ve got multiple headers all with the same name in Kamailio

Categories
FreeSWITCH VoIP

Originating calls in FreeSWITCH

Starting calls from FreeSWITCH

Categories
Kamailio VoIP

Kamailio Bytes – Using Rtimer to run Jobs

Using the Rtimer module and UAC to be annoying, or very useful.

Categories
EPC LTE Mobile Networks RFCs & Standards SDM VoIP

Basics of EPC/LTE Online Charging (OCS)

A glimpse into the complexities of prepaid billing (Online Charging) Diameter based networks.

Categories
FreeSWITCH VoIP

HTTP PUT call recordings from FreeSWITCH

Using mod_httpapi to HTTP POST call recordings to a remote server

Categories
Kamailio VoIP

ENUM in Practice with Kamailio

Using ENUM to resolve E.164 numbers into SIP URIs using Kamailio.

Categories
EPC Mobile Networks RFCs & Standards VoIP

Docker & BIND as an ENUM Playground

A Bind environment in a Docker container for experimenting and learning ENUM for DNS based Call Routing.

Categories
IMS / VoLTE Mobile Networks RFCs & Standards SDM VoIP

ENUM – DNS based Call Routing

Using DNS to resolve E.164 phone numbers to routable SIP URIs

Categories
5G SA EPC IMS / VoLTE LTE Mobile Networks SDM VoIP

IMS Routing with iFCs

Peer behind the magic curtain at how IMS networks route your VoLTE and VoNR calls, and how iFC (Initial Filter Criteria) achieve this.

Categories
FreeSWITCH IMS / VoLTE Mobile Networks VoIP

Adding support for AMR Codec in FreeSWITCH

Adding support for AMR Codec in FreeSWITCH