A. Yes, it's certainly possible to share dial-up Internet access across a wireless home network or other wireless LAN (WLAN).
Wireless LANs easily support the amount of bandwidth required to share dial-up Internet service. Dial-up runs at such low speeds, however, that Internet connections will perform sluggishly at times on WLANs, particularly when multiple computers access the Net at the same time. Try any of the following approaches to make it all work as well as can be expected.
Wired Router with Wireless Access PointThis option requires three pieces of hardware in addition to wireless network cards for the client computers: a wired broadband router, an external modem, and a wireless access point. Connect the external modem to this router for Internet access, then connect the wireless access point to the router for wireless access. Not all broadband routers support external modems; look for those that feature RS-232 serial ports.
Ad Hoc Mode With Windows ICSAlternatively, you can try Windows Internet Connection Sharing (ICS) or equivalent software that relies on one computer hosting the Net connection. This option requires at a minimum that the host computer have a modem (either internal or external), and that all wireless network cards be configured for ad hoc (peer-to-peer) mode. This option works best if you only have a few home computers located close to each other.
Those who prefer the first option usually already own a wired broadband router that supports external modems. Because the second option requires neither a wired router nor an external modem, it is usually cheaper and easier to set up for those building new home networks from the ground up.