Turnkey Network Designs

2003 Neighbourhood	2002 Community	2004 Metropolitan
Design Capacity 3,000 broadband subscribers	Design Capacity 20,000 broadband subscribers	Design Capacity 35,000 broadband subscribers
A compact and affordable way to establish a network. Small number of servers can be built in rack-mount or desktop cabinets. Completed project includes all servers, switches, backup, UPS, spares, software, and documentation wiki.	A serious start to a mid-sized community's Internet service. Completed project includes all servers, switches, backup, UPS, spares, software, installation, training, and documentation wiki.	The Metropolitan puts a large capacity & high performance network within the budget of new ISPs in larger markets and African telecoms. The completed project includes redundant load-balanced servers, switches, backup, redundant UPS, spares, software, installation, training, and documentation wiki.

Maximum subscriber capacity reflects average storage allotment of 100MB per subscriber for web and e-mail combined.

The design you choose should be based on the number of subscribers you expect to have in the first year or two. Remote access capacity (e.g., modems) can easily be added as needed, but upgrading the network is a bit more complicated so you will probably want to avoid this while you are working out your ISP's operating procedures.

Subscriber capacity is impossible to accurately define due to the many unique factors of an ISP. The demographics of your subscriber base could result in higher or lower bandwidth usage and, thus, affect the suitable subscriber capacity. In developing countries where slow speeds are common, the number of subscribers could be significantly increased.

Estimates assume 3% instantaneous demand, 50kbps dial-up speed, 1Mbps broadband speed, 20% http traffic, and 30% proxy efficiency.