Washington School District WAN Description.

School Sites.

Each school will have a single fibre route to the telephone exchange. The fibre will be terminated on Access SDH equipment at the school, enabling additional bandwidth to be provided with minimal disruption. Each school will be connected to its nearest District Office via a T1 point to point leased line except Community School which will have a basic rate ISDN connection.

District Offices.

Each District Office will have two fibre routes, each to a separate telephone exchange, for resilience. The fibres will terminate on SDH equipment, enabling additional bandwidth to be provided with minimal disruption. Each District Office will be connected via 4 x T1 leased lines to each of the other two District Offices.

The WAN links from schools and other 2 District Offices will be split between 4 x 7200 series routers. Thus 3 routers will terminate 3 WAN links from schools and 1 router will terminate 2 WAN links from schools. The router terminating only 2 school WAN links will have an Ethernet interface for connection to the LAN in the District Office.Phoenix CO District Office and Internet Connection.

One router at Phoenix C.O. District Office will have an additional Ethernet interface for connection to the Internet Services Segment (public backbone). This segment will host the District Web server and servers for DNS and email. Access from the Internet to the Internet Services Segment will be via a Firewall Router. The Internet connection will be via a Frame Relay PVC with a CIR of 1.544 Mb/s.

The diagram below shows the Wan connections. Only 2 of the 4 routers at each District Office are shown for the sake of simplicity.