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Troubleshooting multiple monitors
A few tips for shooting multiple-monitor trouble follow:
* If a secondary monitor doesn't seem to be coming up, you probably haven't activated it. (I know, this should be automatic, but it isn't.) Go to the Display control panel's Settings tab, click the number two monitor (or three or four or whatever), and enable the Extend My Windows Desktop onto This Monitor check box. You'll usually need to restart the PC for the change to take effect.
* A modern docked laptop can typically use the internal display for multiple display capability if the docking station supports PCI, but you'll have to use the onboard display adapter as the primary adapter. Also, you won't be able to perform a hot-undock operation.
* You can set the color depth and resolution separately for each monitor.
* You can set the relative positioning of the two (or more) monitors by dragging and dropping the monitor images in the Display control panel's Settings tab.
* If your primary monitor isn't the one you want it to be, and both video adapters are plug-in cards, swap their positions in the PCI bus. The PC BIOS activates these cards in order according to their slot number. The BIOS on some PCs lets you override this automatic assignment.
* If an application doesn't extend its window to a secondary display, try maximizing the application window.
Modems, Single Link and Multilink
Modem connectivity in Windows XP Professional is considered part of the networking architecture, and therefore to set up and configure modem connections, you use the command Start?Control Panel?Network Connections.
In this section, I focus on getting the hardware installed and configured. Chapter 13 contains a lot more information about configuring specific connections.
Installing and configuring good old digital-to-analog-to-digital modems (called analog modems now for short, as opposed to all-digital devices such as ISDN adapters, which aren't really modems at all) may be the subject of an exam question or two.
Modem driver installation
Windows XP Professional just isn't very good at automatically detecting modems. If the operating system fails to detect a new modem (and in my experience it always fails if the modem connects via an external COM port), then you must initiate the driver installation process yourself. Do so by double-clicking the Phone and Modem Options icon in Control Panel and clicking the Modems tab followed by the Add button. Go ahead and let Windows try to autodetect the modem first; if that fails, specify the manufacturer and model yourself. If you don't have an INF file provided by the modem manufacturer, you can install the Standard Modem driver, at the possible expense of some functionality and speed.
Instant Answer If Windows XP Professional can't seem to find your modem to install its driver, you may need to perform a separate step to install a COM port serial driver associated with that modem. You may also consider disabling any unused COM ports, too, as they always tie up system resources (interrupts, and so forth) even if they're not active.
Tip The redesigned Phone and Modem Options control panel replaces two control panels found in Windows NT 4.0, Modems and Telephony.
Modem logging is on by default in Windows XP Professional. You can't turn it off; all you can do is control whether a new log gets created every time a dial-up connection occurs, or the logging info appends to the existing log. Set this via the Telephone and Modem Options control panel, on the Diagnostics tab of the modem's property sheet (see Figure 8-4).
Figure 8-4: Here you can control logging and view the current log file.
Remember The log file is typically in C:\WINDOWS and has a name that begins with MODEMLOG and ends in .TXT. The precise filename depends on the make and model of your modem.
You can click the Query Modem button on the property sheet's Diagnostics tab to perform a routine communications check. If this check fails, then Windows and your modem aren't on speaking terms, and you may want to check whether you have the correct driver. Also look for a problem icon in Device Manager indicating a resource conflict.
Integrated Services Digital Network (ISDN) lines are digital lines, installed by the phone company, that provide better speed than analog modems. An ISDN connection sports two 'B' channels for data and voice, each of which can handle 64 kilobits per second, and one 16Kbps 'D' channel for control.
Instant Answer Windows XP generally autodetects newly installed ISDN adapters automatically upon restart. Failing that, run the Add/Remove Hardware Wizard and provide the disc supplied by the manufacturer if the wizard doesn't detect the device.
You can configure in Device Manager the type of switch the line connects to, such as AT&T or Northern Telecom. Then, create ISDN network connections by using the Make New Connection Wizard in the Network Connections folder.