Thanks to your help it was a "piece of cake" to set up the small wireless network in the home office. I'm using the modem supplied by Optimum and a wireless Netgear WGR614 router with two of their USB connectors for the clients and now all is 128 bit WEP with printer and file sharing (the ZA firewall was problematic but now works). My co-worker has to disable the wireless temporarily to dial up (very simple two clicks) but once all of the email addys are changed and announcements sent out to clients and site managers the need for dialup will end (unless cable goes down).
Yesterday there was a problem with all of the phones in the office. Two of them are cordless, the other on a fax machine wired. We had no dial tones. The owner of the business and my co-worker immediately blamed it on the wireless hookup but my research on the web indicated that this usually is the other way around, that cordless phones can interfere with WiFi. Is there any way that this can be proven to them? I thought of changing the channel the Netgear operates on but didn't find the setting for it in the config file (unlike with my AirPort Extreme where it is easily located).
What was interesting, and that my completely non technically inclined co-workers/manager overlooked is that dialup worked fine for three days after the wireless install and then nothing. Four hours after the phones died, the phones worked fine (with wireless still up). My guess is that it was a phone line problem, not a WiFi interference problem. How can I prove this to them and avoid having to go back to a wired network? fwiw A call to Verizon was fruitless.