All computers are connected to a fast ethernet lan powered by intelligent switches. Appropriate network protocols like TCP/IP are in effect. Eleven server computers are running Microsoft Windows NT Family and Microsoft Office Server, to serve a wide variety of needs like filing and print sharing, e-mailing, packet routing and network security. Electronic Information Transfer Tehran Raymand Consulting Engineers is equipped with a computer network of 240 nodes capacity. This network serves all departments of the Company. File transfer and electronic mail system are provided for information exchange using network facilities and e-mail services. Tehran Raymand Consulting Engineers is connected to outside world via Internet Services. All nodes of the network can be provided with Internet access right. This facilitates great flexibility in information retrieval and information exchange by using e-mail, gopher mail, FTP file transfer and other Internet services. A dedicated PC is assigned for providing remote connection to the network via remote dialing. Remote dialing is used for drawings and document exchange between the home office and remote sites