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 […]

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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.

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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
Mobile Networks RFCs & Standards

MMS Deep Dive – MM1 – Mobile Terminated MMS

Second part in our MMS series, in this one we look at Mobile Terminated MMS.

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IMS / VoLTE Kamailio Mobile Networks RFCs & Standards VoIP

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 set to: sip:scscf.mnc001.mcc001.3gppnetwork.org:5060 But the I-CSCF was only looking up A-Records for scscf.mnc001.mcc001.3gppnetwork.org, not using DNS-SRV. The problem? The Server-Name I had configured as a […]

Categories
GSM IMS / VoLTE Mobile Networks VoIP

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 this could be quite simple – You’d set the From header to be the name rather than the MSISDN, but for most SMSoIP deployments, the […]

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FreeSWITCH IMS / VoLTE Mobile Networks VoIP

FreeSWITCH – Incompatible Destination

A quick look at a possible cause for “INCOMPATIBLE DESTINATION” errors in FreeSWITCH.

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IMS / VoLTE Kamailio Mobile Networks VoIP

Kamailio, IMS & DNS Headches

A quick post on a lesson that took me a while to learn with DNS, Kamailio and IMS.

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FreeSWITCH IMS / VoLTE Kamailio Mobile Networks VoIP

FreeSWITCH, Kamailio & IMS Extensions

Bad Extension is nothing to do with the Dialplan…

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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.

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Mobile Networks RFCs & Standards

MMS Deep Dive – MM1 – Mobile Originated MMS

A deep dive into Mobile Originated MMS via the MM1 Interface

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, […]

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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.

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EPC LTE Mobile Networks

Evolved Packet Core – Analysis Challenge

Step right up folks and test your skills on EPC with this PCAP analysis challllleeennnggeee!

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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.

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FreeSWITCH IMS / VoLTE Kamailio Mobile Networks VoIP

FreeSWITCH as an IMS Application Server

Using FreeSWITCH as an IMS Application Server

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Mobile Networks RFCs & Standards

ITU International Point Code Structure

A brief look at International Signaling Point Code numbering and what it all means.

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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