106APPENDIX 1. –How to run IP Camera UPnPThe most troublesome issue when you setup an IP Camera ®is that you have no idea what the IPaddress of this device is. Now IP Camera®supports the UPnP (Universal Plug and Play) protocolwhich makes it easier for you to examine it; however, it is a pity that Microsoft Windows XP®doesn’t start this service by default. Therefore, the following procedures will help you to turn it onand discover your IP Camera®step by step as shown in Figure1 below.Figure 1 UPnP Setup Flow Chart1. Check the IP class of your PCIn most case Microsoft Windows XP®will assign an IP address, 169.254.*.*, automatically with asubnet mask, 255.255.0.0, if the DHCP server is absent, while the default IP address of an IPCamera®is 192.168.1.168 with a subnet mask of 255.255.255.0. There won’t be anycommunication due to different IP class domains, and you have to modify the relative settings orthe UPnP protocol won’t work; however, checking your own IP address is necessary. Here arethe procedures to check and modify them.Step 1: From the Start menu, point to Settings, and then click Control Panel. See Figure 2.