"Ethernet/Token Ring/Cisco Console/whatever uses an RJ45 connector" RJ45 defines a keyed 8P8C type connector, wired in a specific manner, for a specific 2 wire telco service. Incompatible with the above on several levels. "RJxx" == specific connector/wiring pattern for specific telco applications. Non-telco uses need not apply. One of these days I'm going to start carrying around some actual RJ45 type cables to hand out to those who ask. "DB9" DB defines a D series subminiature connector with a size "B" (nominal 25 pin) shell. DE defines a size "E" (nominal 9 pin) shell. DA15, DB25, DC37, DD50, DE9, etc.. Also DB13W3 (old Sun monitors), etc. If in doubt, refer to ITT/Cannon catalogs. (my oldest is from 1971). -- -- Welcome My Son, Welcome To The Machine -- Bob Vaughan | techie@{w6yx|tantivy}.stanford.edu | techie@tantivy.net AF6RR | P.O. Box 19792, Stanford, Ca 94309 | 1-650-469-3850 -- I am Me, I am only Me, And no one else is Me, What could be simpler? --