VOIP Codec

What codec should I use ?   PCMU (G711u) is used by default. Both PCMU and PCMA will give you […]


  There are several ways to encrypt your data before you send it to the cloud, but if you simply […]

Cisco PBX UC500 config

New Extension number creation   voice register dn   To enter voice register dn configuration mode to define an extension […]

monitor Esxi with Nagios

sudo yum install epel-release sudo yum install python-pip   Problem: Cannot uninstall ‘PyYAML’. It is a distutils installed project and […]

Install Openmanage on VMware Esxi

This article describes the installation process of OpenManage Server Administrator VIB (OMSA) on VMware ESXi 5.x and/or VMware ESXi 6.x. […]


  Export to a file tcpdump -i <interface> -s 65535 -w name.pcap   -n:  will suppress name resolution of IPs, […]

AWS cli -S3

S3 Log on the AWS console, go to Users > Security credentials create an access key ID and Secret Access […]