Riordan Manufacturing: Telecommunicaion Concepts

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Table of Contents
Telephone/Network Systems
Network Protocols
Network Topologies and Switching
Network Security
References

Riordan Manufacturing-Current Network
Riordan Manufacturing has buildings in China, San Jose, Albany, and Pontiac—with San Jose being the Corporate Headquarters. There are 125 employees there, with the following breakdown of machines: Research and Development network has a 1 GB backbone. There are 15 MAC G5’s, 3 Phaser printers, and a HP Plotter. Hooked to this network is a switch to a satellite base station, which is connected to a VOIP/Data Router. The VOIP/Data Router is connected to a 24 port Linksys hub to the 100 base T network. Another switch is used to connect the R & D network to a 100 base T network, which consists of WIN Network server, WIN Exchange server, UNIX ERP/MRP Server, and a NAS Iomega P800M. The other half of this network is 35 Dell Optiflex computers. 12 are located in the Corp., and 8 in Marketing. These 20 computers are hooked to a 24 port Cisco switch. Finance has 8 computers, and HR has 7, which are hooked up to the other 24 port Cisco switch. Both 24 port Cisco switches are hooked to the 100 base T network. Also hooked to the 100 base T network are 35 IP phones, and a VOIP/Data Router. The VOIP/Data Router is connected to a T1 line to the outside network. In Albany, GA, there are 20 Compaq Presario computers and 2 HP LaserJet V’s connected via cat5 cable to a 48 port patch panel—which is then connected to two Nortel Baystack switches. There is a Compaq Proliant Fileprint Server, Exchange Server, and 2 HP UNIX Servers (one UNIX-ERP, and one UNIX-MRPII). These servers are connected to the two Nortel Baystack switches, and also go to a 24 port Nortel Baystack switch, to the manufacturing floor. The two 24 port Nortel Baystack switches are 100Mbps switches that are connected to a Cisco Router, that is then connected to a Kentrox Datasmart 658 CSU/DSU that has a fractional T1 line connected to Corporation. The Pontiac, MI facility has 45 Compaq computers and 3 network HP LaserJet printers connected to 3 24 port patch panels (15 computers and 1 printer per one 24 port patch panel). Each patch panel is connected to a Nortel Baystack 107 10BT hub (24 port, 10Mbps with bridge module). These Nortel Baystacks are then connected to a Cisco 2500 Router, which is then connected to a Blackbox CSU/DSU V35, which is connected to w fractional T1 line to Corporation. The Nortel Baystack hubs are also connected to a Compaq Proliant Fileprint Server, Exchange Server, and 2 HP UNIX Servers (one UNIX-ERP, and one UNIX-MRPII), which is connected to a 24 port Nortel hub at 10Mbps, that connects them to the manufacturing floor. In Hangzhou, China there are 40 Dell Optiflex computers connected to 2 24 port Cisco switches. Of these 40 computers, Corp. and Finance departments combine for 20 computers, hooked to a 24 port switch. MFG, MTLS, and QA combine for the other 20, connected to the other 24 port Cisco switch. 8 HP LaserJet V printers are on an 8 port hub, connected to the same 100 base T network. There are 40 IP phones, and a Router connected to an outside line via T1. The other part of the 100 base T network consists of a NAS Iomega P800M, WIN Network Server, WIN Exchange Server, and a UNIX ERP/MRP Server. The entire 100 base T network is connected to a Gateway/Switch that is connected to a satellite base station connected to corporate headquarters. This satellite station is connected to a VOIP/Data Router, which is connected to the 100 base T network and 3 24 port Linksys hubs, then to the factory floor. Advantages and Disadvantages

The advantage of running a VOIP system for a corporation like Riordan is not only that of improved quality in communicating from facility to facility, but also VOIP systems are relatively less expensive as they can use the existing router connections that also run their networks. This method can obviously save Riordan financially...
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