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الأحد، 30 ديسمبر، 2012

How Analog Phone Works


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

How Analog Phone Works



Inside a Telephone

The very simplest working telephone would look like this inside.


As you can see, it only contains three parts and they are all simple:

  • A switch to connect and disconnect the phone from the network - This switch is generally called the hook switch. It connects when you lift the handset. On hook means that the circuit is opened.
  • A speaker - This is generally a little 50-cent, 8-ohm speaker of some sort.
  • A microphone - In the past, telephone microphones have been as simple as carbon granules compressed between two thin metal plates. Sound waves from your voice compress and decompress the granules, changing the resistance of the granules and modulating the current flowing through the microphone.

That's it! You can dial this simple phone by rapidly tapping the hook switch -- all telephone switches still recognize "pulse dialing." If you pick the phone up and rapidly tap the switch hook four times, the phone company's switch will understand that you have dialed a "4."

The only problem with the phone shown above is that when you talk, you will hear your voice through the speaker.


Most people find that annoying, so any "real" phone contains a device called a duplex coil or something functionally equivalent to block the sound of your own voice from reaching your ear. A modern telephone also includes a bell so it can ring and a touch-tone keypad and frequency generator. A "real" phone looks like this.
Still, it's pretty simple. In a modern phone there is an electronic microphone, amplifier and circuit to replace the carbon granules and loading coil. The mechanical bell is often replaced by a speaker and a circuit to generate a pleasant ringing tone.


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الأربعاء، 12 ديسمبر، 2012

Microsoft You Are Amazing !!!!!!!!!!!!!!!


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

 Microsoft You Are  Amazing !!!!!!!!!!!!!!!


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الاثنين، 26 نوفمبر، 2012

How To Configure Capture Image In WDS (Windows Deployment Services)


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

How To Configure Capture Image In WDS (Windows Deployment Services)
 

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Deploying Windows 7 Using WDS (Windows Deployment Services)


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

 Deploying Windows 7 Using WDS (Windows Deployment Services)  


 

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الأحد، 18 نوفمبر، 2012

Reset Domain Services Restore Mode (DSRM) Password


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

Reset Domain Services Restore Mode  (DSRM) Password



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السبت، 17 نوفمبر، 2012

On the go: Filtering GPOs Application Using WMI Filters


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

Filtering GPOs Application Using WMI Filters
 

ولا تنسوني والمسلمين من صالح الدعاء

وصلي الله وسلم وبارك علي النبي وآله  وصحبه وإخوانه وسلم

الجمعة، 16 نوفمبر، 2012

On the go: Installing Software Using GPOs and Using Custom Administrative Templates ".adm"


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

Installing Software Using GPOs And Using Custom Administrative Templates ".Adm"

 

ولا تنسوني والمسلمين من صالح الدعاء

وصلي الله وسلم وبارك علي النبي وآله وصحبه وإخوانه وسلم

الخميس، 15 نوفمبر، 2012

On the go: How To Configure Folder Redirection Using GPOs


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم



How To Configure  Folder Redirection Using GPOs

 

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السبت، 10 نوفمبر، 2012

On the go: Installing the Schema Management Snap-In


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

Installing the Schema Management Snap-In


 

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الجمعة، 9 نوفمبر، 2012

On the go: Adding Additional Domain Controller Using Install From Media "IFM"

بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

Adding Additional Domain Controller Using Install From Media "IFM"


 

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وصلي الله وسلم وبارك علي النبي وآله وصحبه وإخوانه وسلم

الثلاثاء، 30 أكتوبر، 2012

on the go: how to stop a scheduled backup task

بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

how to stop a scheduled backup task

 

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وصلي الله وسلم وبارك علي النبي وآله وصحبه وإخوانه وسلم

الخميس، 25 أكتوبر، 2012

Create Users, Home Folders, And set Permissions all in one script


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم


Create Users, Home Folders, And set Permissions all in one script

Again back to our scripts, the following script not only ceates users but also creates home folders and grant users permissions over their home folders. Also the home folder will be mapped will be mapped automatically to driver Z:. the following video shows how to use the script. 

Note:
In the following video i had granted the "Everyone" a full control over the "HomeDir$", this may be a security hole, so you can replace the "Everyone" by the "Authenticated Users" group and only give them the "change" and "read" permissions not the full control.
 
first download the script from the following link:


 
I hope that has been informative to you.

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الاثنين، 22 أكتوبر، 2012

How To Configuring Fine-Grained Password Policies


بسم الله والحمد لله والصلاة والسلام علي رسول الله وآله وصحبه وإخوانه وسلم

How To Configuring Fine-Grained Password Policies

Prior to Windows Server 2008, an Active Directory administrator was only able to configure a single Password Policy and Account Lockout Policy for any Active Directory domain. If you were faced with a subset of users whose password policy requirements were different, you were left with the choice of configuring a separate domain or forcing all users within the domain to conform to a single password policy. Beginning in Windows Server 2008, you can configure Fine-Grained Password Policies, which allow you to define multiple password policies within a single domain. 
To enable Fine-Grained Password Policies, Windows Server 2008 introduces a new object type called msds-PasswordSettings, also called a Password Settings Object (PSO). Each PSO has the following mandatory attributes:
• cn. The common name for the PSO, such as "ServiceAccountNoLockout."
• msDS-PasswordSettingsPrecedence. In a case where multiple PSOs apply, this attribute of the PSO is used as a tie-breaker to determine which PSO should apply: a PSO with a precedence of 1 will be applied over a PSO with a precedence of 5, a PSO with a precedence of 10 will be applied over a PSO with a precedence of 100, and so on.
• msDS-PasswordReversibleEncryptionEnabled. This attribute indicates whether the PSO allows passwords to be stored in Active Directory using reversible encryption. This setting should only be enabled if a particular application requires it, because it presents a significant security risk. Use “true” or “false”.
• msDS-PasswordHistoryLength. This attribute indicates the number of passwords that Active Directory should retain in memory before allowing someone to reuse a previously used password. Setting this attribute to a value of "2," for example, would prevent someone from reusing the previous two passwords that they had configured for their user account. This setting corresponds to the Enforce Password History setting in Group Policy.
• msDS-PasswordComplexityEnabled. This attribute indicates whether the PSO requires a complex password; that is, a password that uses a mixture of uppercase and lowercase letters, numbers, and symbols. The default password policy in Windows Server 2008 requires the use of complex passwords.
• msDS-Minimum Password Length. This attribute indicates the minimum length of a password defined by this PSO.
• msDS-MinimumPasswordAge. This attribute is a negative number that indicates the number of milliseconds old a password must be before it can be changed. The default value is -864000000000, which equates to one day. It should be entered in the form of: Days:Hours:Minutes:seconds

• msDS-MaximumPasswordLength. As the name indicates, this attribute identifies the maximum length of a password defined by this PSO.
• msDS-MaximumPasswordAge. This attribute is a negative number that indicates in milliseconds when a password will expire. The default value is —36288000000000, or 42 days.
It should be entered in the form of: Days:Hours:Minutes:seconds
• msDS-LockoutThreshold. This attribute indicates the number of bad login attempts permitted before an account is locked out.
• msDS-LockoutObservationWindow. This attribute is a negative number that indicates the number of milliseconds that must pass before the counter for failed logon attempts should be reset. It should be entered in the form of:
Days:Hours:Minutes:seconds, for example make it 2 minutes which is the default for the AD policy.
• msDS-LockoutDuration. This attribute is a negative number expressed in milliseconds that indicates how long an account will remain locked out. A value of "0" indicates that the account will stay locked out until it is manually unlocked by an administrator.
It should be entered in the form of:  Days:Hours:Minutes:seconds, for example make it 2 minutes which is the default for the AD policy.

Note:

The “msDS-LockoutObservationWindow” could not be longer than the “msDS-LockoutDuration”.  Also the "msDS-MaximumPasswordAge" cannot be set to 00:00:00:00


You can create one or more PSOs within a domain and then configure each PSO to apply to one or more user or group accounts within the domain; these objects are not created using the Group Policy Management Editor, but by manually creating the object using ADSIEdit or LDIFDE. When a user logs on to the domain, Windows Server 2008 uses the following steps to determine the user's effective password requirements:
1. Are one or more PSOs assigned to the individual user account? If so, use the PSO that has the winning precedence. If not, continue to step 2.
2. Are one or more PSOs assigned to a group that has the user account as a member, either directly or through nested group membership? If so, use the PSO that has the winning precedence. If not, continue to step 3.
3. If PSOs are not assigned to the user or to any group that has the user as a member, apply the domain-wide password policy and account lockout requirements “Defined by Group Policy”.

Configuration Example:




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