4Home User / FMCThe “Fixed Mobile Convergence” (FMC) feature allows to execute external connec-tions via the OpenCom 100 / Aastra 800 communications system. This is done by thecommunications system managing an external standard terminal, e.g. a mobile tele-phone, as an internal terminal with its own internal call number. Parallel operation ofa stationary system telephone and an external standard terminal that can be reachedunder the same internal call number is of particular interest for home users, forexample (FMC telephone, home user telephone). This is how all features of the systemtelephony can be used on the home user telephone. System features such as e. g.enquiries and forwarding can be executed using code-number procedures.Connection expenses are limited to the connection to the communications system. Whenthe user establishes an external connection (e. g. an international call) via the communi-cations system, the expenses for the international call are apportioned to the system.There is no difference in how both terminals can be reached by callers: an incomingcall is signalled on the system telephone and on the home user telephone at the sametime. When a call is accepted on the home user telephone, the terminal of the caller,the office call number administered on the OpenCom 100 / Aastra 800 communica-tions system is displayed, which can be used to reach the system telephone as well.An outgoing call using the home user telephone is executed via the same call numberas a call from the system telephone.NoteSystem telephony features (e. g. dialling into the communications system, enquiry, for-warding) can be conveniently used on a mobile telephone (FMC telephone) when youinstall the “Aastra Mobile Client” software on the device. Comparable to a system termi-nal, this makes many features available on the mobile telephone via a separate menu.For further information please contact your dealer or your Aastra representative.You Need AuthorisationMost of the features mentioned in this Quick Reference Guide are only available toyou if you have appropriate authorisation. This will be set up by your system adminis-trator when configuring the OpenCom 100 / Aastra 800. If you are unable to use a par-ticular feature or have any questions, consult your system administrator. Please referto the chapter entitled “Frequently Asked Questions” in the “Mounting and Commis-sioning” (with an Aastra 800: “Installing and Commissioning”) guide for tips on how todeal with any faults you may experience while using your telephone.