Handset Information26Handset InformationWhy is a function not available?This may be due to one of the following reasons: The function has not been configured for yourtelephone - address any questions to CustomerSupport. Your communications platform does not support thisfunction - contact your T-Com sales representative toupgrade your system.Where can I get the accompanying operatinginstructions? The Comfort Open System-CD contains your UserGuide in PDF format. On the Internet at http://www.telekom.de under"Downloads" "User Guides" under "Comfort Open".All you need to know is your telephone model and thecommunication platform to which your telephone isconnected.The chapter "Basic operating instructions" contains generalinformation.What do I have to consider with initial start-up?After starting the telephone for the first time, please followthe prompts at your telephone for entering the extensionnumber. You get the necessary information from yourresponsible technical personnel. To find out more informa-tion on start up, read the User Manuall for yourComfort Open W 500 on the Comfort Open System CD.Optionally available charging shellComfort Open WL 500: MatNr. 40218976