Categories
Mobile Networks SDM

SSH into Cisco STPs

How to SSH into a Cisco STP from a modern Linux shell

Categories
5G SA GSM IMS / VoLTE LTE Mobile Networks RFCs & Standards SDM

An intro to GSMA TAP3 Files

Getting to know the GSMA’s TAP files, what’s in them, and how they’re used to bill roaming traffic.

Categories
5G SA EUTRAN Mobile Networks RF

Inside a 32×32 MIMO Antenna

A peek under the radome of 32×32 5G Active Antenna Unit

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IMS / VoLTE Mobile Networks RFCs & Standards SDM SIM Cards Software

SQN Sync in IMS Auth

A look at how the SQN resync procedure is performed in the IMS Authentication flows

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Asterisk FreeSWITCH IMS / VoLTE Kamailio Mobile Networks VoIP

HOMER API in Python

Interacting with Homer SIP capture vai the API

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EPC IMS / VoLTE LTE Mobile Networks RFCs & Standards SDM

Getting to know the PCRF for traffic Policy, Rules & Rating

A look at the PCRF in EPC Networks, and the Charging Rules that lay at the heart of it all.

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IMS / VoLTE Kamailio Mobile Networks VoIP

Failures in cobbling together a USSD Gateway

Adventures in setting up a non-working USSD Gateway for IMS

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Kamailio VoIP

Kamailio Bytes: Adding Prometheus + Grafana to Kamailio

Adding Prometheus support to Kamailio and rendering stats in Grafana

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Uncategorized

Most Popular Articles of 2022

A lazy listicle to wrap up the year.

Categories
Mobile Networks VoIP

Demystifying SS7 & Sigtran – Part 6 – Calling with ISUP

A look at carrying useful traffic over SS7 with a quick intro to ISUP

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IMS / VoLTE Mobile Networks RFCs & Standards

SMS-over-IP Message Efficiency – K

How much overhead is used to send the message “K” back to an SMS?

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Australian Telco Notes

Charging problem on Fluke 990 CopperPro

Charging issues on Fluke 990 CopperPro test set.

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IMS / VoLTE Kamailio Mobile Networks RFCs & Standards Software VoIP

Kamailio Diameter Routing Agent Support

Using Kamailio with a Diameter Routing Agent

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EUTRAN Mobile Networks RF

Ericsson & Nokia RRU Power Connectors – Wiring and Tricks

Assembling Amphenol RRU power connectors and modifying them to work with Ericsson and Nokia RRUs.

Categories
EPC IMS / VoLTE Mobile Networks Python SDM Software

Diameter Routing Agents – Part 5 – AVP Transformations with FreeDiameter and Python in rt_pyform

Using FreeDiameter, Python and our newly released “rt_pyform” module to rewrite AVPs in your FreeDiameter based Diameter Routing Agent.

Categories
EPC EUTRAN LTE Mobile Networks RFCs & Standards Software

NB-IoT NIDD Basics

An overview of the who, how and why of Non-IP Data Deliver in NB-IoT cellular services.

Categories
EPC IMS / VoLTE LTE Mobile Networks RFCs & Standards SDM Software

Diameter Routing Agents – Part 5 – AVP Transformations

A look at why we’d want to apply translations to Diameter AVPs inside a Diameter Routing Agent

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EPC IMS / VoLTE LTE Mobile Networks SDM Software

Diameter Routing Agents – Part 4 – Advanced FreeDiameter DRA Routing

Looking at overriding the default Diameter routing logic in FreeDiameter with rt_default

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EPC IMS / VoLTE LTE Mobile Networks SDM Software

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

Using FreeDiameter as a DRA

Categories
EPC IMS / VoLTE LTE Mobile Networks RFCs & Standards SDM

Diameter Routing Agents (Why you need them, and how to build them) – Part 2 – Routing

Diving back into the world of Diameter Routing Agents with a look at the logic that defines how a DRA routes traffic from one place to another.