The hardest contract I've taken
2024-08-10 03:14 by Ian
This is a description of the most difficult contract I've ever taken: Building a pirate cellphone tower to crack GSM's weakest deployed stream cipher, and ultimately recover an entire recorded phone call.
Home VoIP System Part 1: Provisioning the phones
2020-06-13 23:54 by Ian
A HOWTO for preparing the VoIP phones for re-use.
Home VoIP System Part 0: Introduction and materials
2020-06-13 23:50 by Ian
Building a home VoIP intercom/paging/control system.
Three-minute history of telephony
2014-11-11 12:44 by Ian
This is something I wrote for some coworkers in an effort to describe why the telephone signalling system is full of what appears to be arbitrary cruft and inconsistency. I thought it might be worth poasting.
Installing asterisk 10 realtime
2012-09-04 11:28 by Ian
This is a brief guide to setting up asterisk on a generic linux host. This particular guide was written using CentOS 6. The process and configuration have been checked for accuracy on CentOS 6, Debian, and Gentoo. I have tried to indicate steps where such differences are relevant,