Cisco WRTP54G - Manual (Page 86)

Wireless-G Broadband Router with 2 Phone Ports
78 Appendix A: Troubleshooting
Frequently Asked Questions
I have excellent signal strength, but I cannot see my network.
Wireless security is probably enabled on the Router, but not on your wireless adapter (or vice versa). Verify that
the same wireless security settings are being used by all devices in your wireless network.
How many channels/frequencies are available with the Router?
There are eleven available channels, ranging from 1 to 11 (in North America).