5 Free VoIP Softphones


The steady rise in people using IP telephony to communicate — for personal and business reasons — has led to the development of a number of different VoIP “softphones” that […]

How Spanning Tree Protocol Works

Spanning Tree Protocol

Spanning Tree Protocol (STP) is a bridge-to-bridge protocol developed by DEC. The DEC Spanning-Tree Algorithm was subsequently revised by the IEEE 802 committee and published in the IEEE 802.1D specification. […]

Install Android Apps to SD Card Without Rooting


There are many android applications present on Google Play Store that are capable to move or install apps on SD Card.  When installing a new application on Android, it will […]

Recovery Ubuntu GRUB Bootloader After Installing Windows (Dual-Boot)

GRUB Bootloader

Grub 2 typically gets overridden when you install Windows or another Operating System. To make Ubuntu control the boot process, you need Reinstall (Repair/Restore) Grub using a Ubuntu Live CD. […]

Class C Network Addressing

Class C Network Address

For Class C networks, the RFCs define the first 2 bits of the first octet as always turned on, but the third bit can never be on. You can follow […]

Class B Network Addressing

Class B Network Address

In a Class B network,  the request for comments (RFCs) state that the first bit of the first byte must always be turn on, but the second bit must always […]

Class A Network Addressing

Class A Network Address

The designers of the IP address scheme said that the first bit of the first byte in a Class A network address must always be off, or 0. This means […]

Queries and Page Load Time in WordPress

Queries and Page Load Time

WordPress is a blog engine built with PHP programming language and MySQL database, so that each time the blog is accessed, there will be demand query to the database prior […]

Configuring NTP on Cisco Device

Cisco Device

Network Time Protocol (NTP) is a protocol for distributing the Coordinated Universal Time (UTC) by means of synchronizing the clocks of computer systems over packet-switched, variable-latency data networks. I’ve tried […]

Elastix External Call Disconnect After 6 Seconds


How to solve elastix server problem to call and disconnect/drop call after 6 seconds? When you try to call someone there is the call hangup automatically right after 5 or […]