How does cdr work

In a CD-R, you have a plastic substrate, a dye layer and a reflective gold layer. On a new CD-R disc, the entire surface of the disc is reflective -- the laser can shine through the dye and reflect off the gold layer. When you write data to a CD-R, the writing laser which is much more powerful than the reading laser heats up the dye layer and changes its transparency.

The change in the dye creates the equivalent of a non-reflective bump. This is a permanent change, and both CD and CD-R drives can read the modified dye as a bump later on. It turns out that the dye is fairly sensitive to light -- it has to be in order for a laser to modify it quickly.

Therefore, you want to avoid exposing CD-R discs to sunlight. Sign up for our Newsletter! Mobile Newsletter banner close. A call detail record CDR provides information about calls made over a phone service.

A CDR report can offer businesses exact answers about where, when, and how calls are made for reporting and billing purposes. This metadata typically includes:. The call detail record simply shows that the calls or messages took place, and measures basic call properties. Consider the following CDR report as an example, generated from a user on a cloud phone system. A CDR log lists every billable communications transmission on your phone system.

This allows phone companies to generate your phone bills, and lets you keep definite records of how and when your phone system was used. They are primarily used by businesses to assist in call reporting and billing. Billing departments use CDRs to resolve disputes, keep records of how funding is spent, and log usage of the telephone system.

Yes, both audio and data CDs can be duplicated. You can even create audio CDs that are compilations of other audio CDs. Bear in mind that most CDs are protected by copyright laws. About 74 minutes of audio, or about MB of data. Yes and no. League of Legends Wiki. League of Legends Wiki Explore.

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