Solution : https://service.sap.com/sap/support/notes/178241 (SAP Service marketplace login required)
Key words :
simplified work center maintenance, additional key words sapphone, area code extension combination, work center settings, incorrect area code, dialog box 'maintain, solution apply add-, allowed extension, telephone number', program error
Related Notes :
177543 | Collective note for IS-U/CCS 1.2 - add-on patch 013 |
146382 | SAPphone: Extension check with incorrect server |