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A crossover cable is necessary for two similar devices to talk to each other without the use of an intervening network connectivity device because the transmit and receive signals must be crossed between the two devices.
This is what a hub or switch would normally do. If a normal, straight through cable were to be used it would connect the transmit signal to the transmit signal on the other device, which is equivalent to two people talking to each other at the same time with no way to listen to what they are saying.
With a crossover cable the transmit signal on one end is connected to the receive signal on the other end so the two devices can talk and listen to each other.
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∙ 12y agocross over or roll over cable
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Why should you use straight cable when connecting two different devices?
Same device----> crossover cable Different device->Straight through cable
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Hi frank - if the Galaxy tab won't hard reboot by holding the power cable, then it seems that your charging cable for the galaxy tab has gone bad. Is there another USB cable you can use to try and charge the device? If not, you may have to purchase a new cable to charge your device.
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