8 Ways to Recyle Old Wireless Gear
Extra Access Points, Legacy Support, Repeaters, Repeaters, Build a Bridge
Don't throw away your old 802.11g routers just yet. The new slick-looking 802.11n routers may provide higher speeds and performance, but there are still many ways your old gear can help out, including extending your wireless coverage, improving a new network, assisting in offering public Wi-Fi, providing network authentication, or enabling secure remote or site-to-site VPN connections.
1) Extend coverage by using it as an AP
Though wireless routers are designed to connect to and distribute an Internet connection, they can be used just for their Wi-Fi capabilities. In other words, you can use it as an access point (AP) instead of a wireless router. If you have a small network with only a single wireless router, this can just about double your wireless coverage-and it's essentially free.
Like a regular AP, you want to place the makeshift AP in a thoughtful spot to provide the best coverage. You want the wireless coverage boundaries of each router to overlap some. Then you have to run an Ethernet cable from the network's router or switch all the way to the makeshift AP.
The trick to turn the router into an AP is to turn off the router's DHCP server and to hook the Ethernet cable to one of the switch ports instead of the old router's WAN port. For more help with this project, click here.
2) Relieve 802.11n routers from supporting 802.11g
When using 802.11n (or Draft N), it's best to allow only 802.11n connections on the router. If 802.11g clients connect, they can slow down the newer clients. However, you can set up the old router again, just to support the old clients. You'd use the router as an AP, such as discussed above, except you could place it right next to the new router since you aren't trying to get more coverage.
So you can better differentiate between the 802.11g and 802.11n signals, you should use different SSIDs or network names. To make sure someone loaded with a 802.11g card doesn't accidentally connect to the new router, you can change the default wireless mode to 802.11n only.
3)Make it a repeater to take the signal further
Another way you can use an old router to extend your Wi-Fi footprint is to turn it into a repeater. Instead of having to run an Ethernet cable out to an AP, a repeater gets its network connection by listening to the airwaves and retransmitting the Wi-Fi signals between the existing wireless network and the users out of the main coverage area. This is great if you can't or don't want to run wires.
Though this range-extending technique doesn't require running cables, it does require flashing your router with replacement firmware. That's because routers don't come with the repeater feature out of the box. If you have a supported router, you can use the DD-WRT, Tomato, or Sveasoft firmware replacement.
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4) Use it as a wireless bridge
If you have computers or other network devices that need to be connected to the network but only have an Ethernet port and aren't close enough to the router, you could convert your old router into a wireless bridge. In bridge mode, the old router would communicate with the new router via the airwaves. Any computers connected to the old router's Ethernet ports would be just like they were wirelessly connected with the new router themselves.
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