Diameter and SIP: Registration-Termination-Request / Answer
Nick These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Registration-Termination Request /…
VoIP
Diameter and SIP: User-Authorization-Request/Answer
The Diameter User-Authorization-Request and User-Authorization-Answer commands are used as the first line of authorization of a user and to determine which Serving-CSCF to forward a request to.
Diameter and SIP: Server-Assignment-Request/Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Server-Assignment-Request/Answer commands are…
Diameter and SIP: Location-Info-Request / Answer
These posts focus on the use of Diameter and SIP in an IMS / VoLTE context, however these practices can be equally applied to other networks. The Location-Information-Request/Answer commands are…
GSM with Osmocom: Call routing in GSM
How call routing in GSM works and it's application in the Osmocom suite
Kamailio Bytes – Docker and Containers
Using Docker to containerize Kamailio instanances
Kamailio Proxy-CSCF Pull
My first Pull / Merge in the Kamailio project was to fix the IMS P-CSCF config
SIP Register – Lesser Known Features
Some of the lesser used / utilized features of the SIP REGISTER method.
Kamailio Bytes – http_client
Using Kamailio to send HTTP requests (POST & GET) to a HTTP server and store the result.
Kamailio Bytes – Multiple Kamailio Instances on a Single Box
Running multiple instances of Kamailio on the same server using init.d
Kamailio Bytes – SIP over TLS (SIPS)
Using Transport Layer Security (TLS) to protect SIP traffic from modification / manipulation and guarantee message authenticity.
Kamailio Bytes – Nightly Releases the Lazy Way
Using apt package manager to install nightly Kamailio builds
Kamailio Bytes – Ansible for Automating Deployments
Using Ansible to automate Kamailio deployments at scale
Things I wish I knew about setting up private VoLTE Networks
Lessons learned about setting up VoLTE / IMS Networks at small scale.
VoLTE / IMS – P-CSCF Assignment
How the P-CSCF address is assigned to a UE in Protocol Configuration Options (PCO) during bearer establishment.
Automated SIP testing with sipcmd
Using sipcmd to test SIP Services from the command line
SIP SIMPLE – Instant Messaging with SIP
A look into Instant Messaging using SIP
PyHSS Update – IMS Cx Support!
An update to PyHSS to support IMS Authentication for VoLTE
Kamailio Bytes – Python + SIP with KEMI
Using KEMI to handle Kamailio SIP Routing in Python
Kamailio Bytes – UAC for Remote User Registration to external SIP Server (Originating SIP REGISTER)
Using Kamailio's UAC module to send outbound SIP REGISTER messages