Looking inside the MMS Exchange (With call flow and PCAP)
Nick A look at Multimedia Messaging (MMS) in 3GPP Networks and how it actually works.
May 2021
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…
The PLMN Problem for Private LTE / 5G
As the number of Private Networks built on LTE and 5G grow, how will PLMN allocation be managed?
How UEs get Time in LTE
How does "Network Time" actually get to the UE?
Diameter Agents
A look at the 4 types of Diameter Agent
SCTP Parameter Tuning
A look at tuning your SCTP parameters to detect failures quickly and reduce dropped packets when they happen.
Australia’s fake Phone Numbers
Numbers that will never connect, reserved for use in TV/Movies & Books.
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.
Pre-5G Network Slicing
5G introduces Network Slicing, or does it? A look at slicing mechanisms widely used in pre-5G networks.
Adding Vlans to VMware Workstation
Setting up VLANs in Workstation to allow ever-more complicated network setups.