Suggest you check out the latest advisory on connection methods for version 7.0 this is available on the CSC website it contains the following Phrases When adding V7.0 stations to I/A systems using NCNIs: Workstations can be added using only NCNI pairs with an RCNI two workstations can be added using one pair of NCNIs, two RCNIs and a pair of media converters A node can be extended using NCNIs and the extra port on each NCNI can be used to add a workstation. This halves the installation cost for 1 (or possibly two (with convertors) ) workstations. regds _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave