Posts

Configure VoIP with O2 Czech republic

SIP ATA device using O2 as provider in CZ and Grandstream ATA

Posted on Oct 25, 2025

Hyper-V AntiAffinityCollection

Virtual Cluster on Hyper-V and making sure they keep running

Posted on Jan 4, 2021

Issues with Call Manager Express and Voice connection

Issues with Call Manager Express and FXO / line voice connection

Posted on Feb 8, 2018

4G LTE Cisco problems

4G connection issues on Cisco 1941 ISR

Posted on Sep 27, 2017

Edit Windows registry with Fred (Forensic Registry EDitor)

FRED. This stands for Forensic Registry EDitor.

Posted on Jul 10, 2015