For confidential lines with SSTNO=ONLYEXT a replacement number can be configured for display at the called party's station. The modification in the AMO KNMAT must be entered in the relevant NPI for the calling station number. The customer station number must be specified under NUMEXT without any prefixes according to the TONE - as administered in the AMO KNFOR or in the case of no entries TONE=INTERNATIONAL - up to the destination node. The * is used in this case as a delimiter between the customer station number and the extension to be replaced (or the number sequence). The extension number in the "calling party" will be substituted for outgoing calls by the replacement number (number sequence after delimiter *) if in addition REPEXT is defined under MODCON.