Dennis Chang is the founder of Lexel Technologies Pte Ltd, a software company based in Singapore. Dennis holds a Master of Science in Communication Software & Networks, and a Bachelor (Hons) in Electrical & Electronic Engineering.

Prior to founding his company, Dennis had vast experience working in the computer security, smart card and military simulation industries. His company, Lexel Technologies Pte Ltd, specializes in developing GSM and SMS software solutions.

Much of the difficulties in learning C comes from the confusion over the concept of pointers. This article aims to provide a simple guide to understanding the concept of pointers, addresses and variab...

GSM stands for the Global System for Mobile Communications. This article aims to provide an introductory guide to the system architecture of GSM.

Short Message Service (SMS) is the technology that enables user to send and receive text messages via mobile phones. This article aims to provide an introductory guide to the Short Message Service (SM...

This article aims to provide readers an understanding to the architecture of a cellular system. It identifies six basic components that are found in most cellular systems, and offers an insight toward...

Short Message Service (SMS) or TXT messaging is a technology that enables users to send and receive text messages via mobile phones. In order to send/receive SMS via computers, we need a gsm modem to ...