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15-pin monitor male cable connects to... 15-pin female monitor port

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Male connector Female connector

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Send one byte 10110011 Receive one byte 1 - 0 - 1 - 1 - 0 - 0 - 1 - 1 bits

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25-pin serial port on a serial device (modem) 25-pin end of serial cable connects to modem and 9-pin end connects to computers serial port

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PinSignalPinSignal 1Protected ground14Secondary transmitted data 2Transmitted data15 Transmit timing signal 3Received data16Secondary received data 4Request to send17Receive timing signal 5Clear to send18Unassigned 6Data set ready19Secondary request to send 7Signal ground20Data terminal ready 8Data carrier detector21Signal quality detector 9Reserved for data set testing22Ring indicator 10Reserved for data set testing23Data rate selector 11Unassigned24External timing signal 12Secondary carrier detector25 Unassigned 13 Secondary clear to send

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MaleFemale NOTE: Line colors are not intended to represent wire colors.

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Send one byte 10110011 Receive one byte 10110011

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Centronics 1284 Type B Mini-Centronics 1284 Type C DB-25 1284 Type A

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Connects to parallel port on the computer Connects to device

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PS/2 keyboard port PS/2 mouse port Cable PS/2 mouse (device) PS/2 connector

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Type B connector connects to USB device Type A connector connects to USB port on the computer or on a hub

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Type B connector connects to USB port on devices Connects to a USB port on the computer or another hub USB hub Type A connector connects to USB port on the computer or a hub

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5-volt power supply is carried along with the USB signal. Allows small devices, such as handheld scanners or speakers, to use power from the PC, rather than requiring their own power cables. Devices are plugged directly into a 4-pin socket on the PC or hub using a rectangular Type A socket. A USB bus distributes power through each port. This allows low-power devices that normally need their own power adapters to be powered through the cable. Hubs may get all of their power from the USB bus (bus- powered), or they may be powered from their own AC adapters.

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SymptomPossible ProblemSolution USB devices dont work. USB support not enabled in the BIOS. USB BIOS support must be enabled to assign an IRQ to the PCI USB host bus controller. Cant connect USB devices. No USB port on the system. Install a PCI to USB adapter card in the system. Devices dont function or arent detected. USB 1.0 system with cable over 5 meters. Reduce cable length to 5 meters. Device cannot be seen in Device Manager. Operating system does not support USB. USB device failure. Windows 95 provides limited USB support. Upgrade to Windows 98, Windows 2000, or Windows XP. USB device displays an unknown device icon in Device Manager. If the USB host controller but not the Root Hub appears, there could be a possible problem with the USB.INF file. Remote the USB host controller from Device Manager and then click Refresh. Common USB Power Problems

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4-pin 6-pin

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FireWire device FireWire 6-pin connector FireWire port

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IR port

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Receiver connects to USB or PS/2 port Transmitter