Modern and forward looking circumstances need to reflect a much more geographically and demographically mobile population so that distance calling is a larger component of all calling. Additionally the era and use of electro-mechanical switching exchanges and mechanical dial phones is past. Most subscribers today already use electronic telephones in which the telephone numbers that may be called are stored in the telephone memory and dialling consists of selection of the person to be called rather than dial the telephone number (and all its digits) directly. Accordingly Open Plan design is less important and attractive than as was the case in the past.