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Rob, > What kind of hardware switch are you referring to? We utilize the prodcuts from none other than Black Box. The base unit is a rack mount 19" cabinet with a power supply and a master controller. To this connects an external box with a serial port what has a modem on it for connection to a remote computer. The rack contains blades (BNC, Twinax, RJ45, V.24, V.35 - You Pick). Eack blade has three ports, common, system A and system B. The devices (modems, controllers, whatever) connect to Common, you guess the others! Normally all users are routed to system A. When the 'switch' is thrown (while there is a physical switch it is done logically by the backup system since the primary is likely out of commision) they connect to system B. You can gang the switches and add as many cards as you like. Basically you need one blade for each device (or line) you want to switch. Each blade can be switched manually for testing. Larry Bolhuis Arbor Solutions, Inc lbolhui@ibm.net +--- | This is the Midrange System Mailing List! | To submit a new message, send your mail to MIDRANGE-L@midrange.com. | To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com. | To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com. | Questions should be directed to the list owner/operator: david@midrange.com +---
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