I wish to implement a network, which has a number of small networks (small offices with 8-10 users), which will then be interconnected to form a single enterprise (all within the same geography).
The network is designed for capacity and not coverage. The technology used is 802.11(a/b/g).
It will be most favorable if all the devices can be purchased from a single vendor. The devices should provide good performance and security.
You can learn about 802.11-compliant products by browsing the Wi-Fi Alliance website. Visit http://www.wi-fi.org/OpenSection/certified_products.asp?TID=2 and select the type of products you are interested in. Given the modest size of your office WLANs, you can probably consider less-expensive SOHO products from companies like SMC, D-Link, Linksys, and Netgear, although many large companies go for enterprise-class products from companies like Cisco and Proxim. If you are creating these small office networks from scratch, you might also consider combination SOHO firewall/access points from companies like SonicWALL and WatchGuard.
It is not clear how far apart each of your small offices might be, but typically you would connect separate office networks together using a wired backbone. For example, use DSL from each small office to a local ISP, and some type of VPN to interconnect those office networks together securely. If offices are actually in adjacent (or nearby) buildings, you may be able to interconnect them with point-to-point fixed wireless. Without knowing more about your topology and geography and business needs, I can't really point you towards suitable products. If you are interested in outsourcing your network access and VPN needs, you might want to check ISP-Planet's list of managed security (VPN) service providers. To learn more about fixed wireless, check ISP-Planet's How To Page.
This was first published in July 2003