Cisco Wireless Cable Modem & Time Capsule

Question

Hi,
I am having problem extending the cisco wireless modem using time capsule.
1) I am trying to wireless extend the range in time capsule but it hit error like "can't extend this wireless".
2) Since I hit error in 1), I try the Join wirelss setup. I can successfull join the wireless network but I could not use the ethernet port.
Any advise, please.

Answer 1

If you have not already done so, perform a Factory Default Reset on the Time Capsule (TC) to get it back to a known state.
Resetting an AirPort Base Station or Time Capsule FAQ
Then before you hook up the Time Capsule, make sure that the Ethernet port is working correctly on the AirPort Express (AX) by connecting a laptop to the Ethernet connection. Turn off the wireless on the laptop and see if you can get an Internet connection. If you can, the AX and the Ethernet port are working correctly.
Connect an Ethernet cable from the AX to the WAN port (circle of dots or world icon) on the TC
Open AirPort Utility, select the TC, and click Manual Setup
Click the Time Capsule tab below the icons to assign a name to the TC, device password and adjust Time Zone settings
Click the Wireless tab
Wireless Mode = Create a wireless network
Wireless Network Name = Same name as the Cisco network if you want more coverage under that name
Check mark next to Allow this network to be extended
Radio Mode = Auto
Channel = Auto
Wireless Security = Exact same setting that the Cisco network is using...if you want more coverage...etc.
Wireless Password + Same password as the Cisco network
Confirm Password
Click the Intenet icon, then the Internet Connection Tab
Connect Using = Ethernet
Connection Sharing = Off (Bridge Mode)
Update to save settings, wait a minute or two, then power off the entire network and restart again, starting with modem, then Cisco, then AX, then TC, then other devices.
If you want the TC to provide a different wireless network than the Cisco, then assign a different name to the Wireless Network Name on the TC.