Sometimes when your DirecTV system is malfunctioning, a message will appear on your television screen asking you to call a DirecTV extension. Here are the meanings of those DirecTV extensions. DirecTV Extension Explanation 711 Customer account is set-up but the system has not been activated (which is called a partial activation) 721 Channel is not authorized, or subscription has expired 722 A "resend" is required from DirecTV to re-activate an active subscription (i.e. The receiver was off for a long period) 731 Access Card is full and has not reported Read More

TV channel frequencies are radio spectrum frequencies that are assigned to specific television channels. Because the radio spectrum is so large, most television channels are able to associate themselves with a range of radio frequencies, usually on the MHz scale, at which television receivers can tune into their specific broadcasts. TV channel frequencies are crucial with respect to how televisions communicate with broadcasting systems.   How TV Channel Frequencies Work When a television subscriber changes the channel on his/her television set, he/she is actually tuning the television to a specific Read More

Blue Screen Stop 0x00000024 refers to a BSOD (Blue Screen of Death) error message that is displayed whenever there is a conflict with the NTFS.sys file, which is the file responsible for reading and writing to NTFS hard drives. A number of problems can cause this error, with the most common reason being that the user’s hard drive has failed or has become corrupted.   What Causes Blue Screen Stop 0x00000024? While it is possible that software that is incompatible with NTFS systems can corrupt or negatively impact the NTFS.sys Read More

Understanding the Different Combinations of Exchange and Windows Server The different supported combinations of Exchange and Windows Server are listed here: Exchange Server 5.5 is supported on the following Windows versions: Windows NT 4 Server. Windows 2000 Server. Can only replicate data to Active Directory and from Active Directory through the Active Directory Connector (ADC). Exchange 2000 Server is supported on the following Windows versions: Windows 2000 Server with Service Pack 1 or higher. Reliant on Active Directory. Can be installed on a member server or on domain controller. Exchange Read More

Configuring a PPP Server Linux Operating System could be used as PPP Server for configuring both dedicated and dial up connections. For dedicated connections, you should configure pppd and pppd command is used for this. rc.local file is the startup file which is needed to be edited to configure PPP server for dedicated connection. Here you will find how to setup pppoe server on your Linux server. PPP application is installed on Linux server pppd /dev/ttyS1 115700 crtscts PPP daemon will be started with this command and will attach it Read More

A multimeter is used to take measurements of electrical properties for a circuit such as the voltage, current, or resistance. A modern multimeter combines the abilities of legacy voltmeters, ohmmeters, and ammeters. Some of the uses of a multimeter include electrical testing on electrical power sources, motors, and other electrical circuits or components. They are typically used as a diagnostic step when troubleshooting potential electrical issues. What Can a Multimeter Do? You will see multimeters that are both digital and analog with each type providing similar data that can be Read More

A battery isolator is used to prevent primary battery systems from being drained and are mostly used in car stereo systems. These devices cause a secondary/auxiliary battery to be drained instead of the vehicle’s primary battery. This is so whether the stereo is used when the engine is turned off or if an after-market stereo system has been installed that requires more power than the stock vehicle battery can provide. Types of Battery Isolators There are two types of battery isolators: solenoid (relay) and diode. Diode Battery Isolators The diode Read More

The Tyndall Effect refers to the reflection of light as it comes in contact with small particles in a translucent medium. It involves the scattering of light in different colors depending on how short or long a particular wavelength is. For example, the Tyndall Effect can describe the haze seen as light travels through a window covered in dust or the light from a flashlight comes in contact with fog in the air. In these situations, dust and water droplets cause the light to be reflected in a scattered pattern Read More

192.168.2.1 is a private IP address commonly used by the SMC and Belkin router manufacturers for device setup and troubleshooting. SMC and Belkin specialize in manufacturing home networking equipment that competes with Netgear, D-Link, and Linksys brands in the marketplace. The Internet Assigned Numbers Authority (IANA) does not grant exclusive use of the IP address to these companies; however, as other network equipment manufacturers are free to use the IP address if required or desired. If another router or networking device is installed on a local network which uses 192.168.2.1, Read More

Caller ID displays the phone numbers of in-coming calls. There are times when a person may want to prevent his/her phone number from appearing on the recipient’s Caller ID. To temporarily prevent your phone number from showing up on a caller ID, use the following directions: 1. Dial *67. 2. Immediately after dialing *67, dial the complete 10 digit phone number. This sends the Caller ID selective blocking command to the telephone service provider. It is a free service. This will only work if you are calling private and business Read More