Making Calls62Your system administrator can configure the period in the OpenCom 100 / Aastra 800from 30 to 300 seconds and will be able to tell you the current value.Making Calls from the Telephone BookThe Telephone BookApproximately 2,000 entries can be saved in the telephone book of your communica-tions system.This number includes the centrally administered telephone book, the personal entriesof all subscribers, and, provided you are using the multi-company variant of theOpenCom 100 / Aastra 800, the entries in the companies’ telephone books.How many entries you can save in your personal telephone book is determined byyour system administrator when configuring the OpenCom 100 / Aastra 800. The per-sonal entries are automatically sorted into the comprehensive register, but can onlybe viewed on your telephone. (However, the system administrator or a person withthe corresponding authorisation can delete your telephone book completely.)For instructions on managing the telephone book, refer to the section entitled Men-uCard “Phone Book” on page 93.MenuCard “Phone book”The entries in the phone books of the communication system can be saved within thesystem itself or in an external address directory (LDAP server, configured by thesystem administrator). A combination of these storage locations is also possible. Thestorage locations of phone book entries do affect phone book searching (see fol-lowing description).Briefly press the ABC key (on the OpenPhone 63 and theOpenPhone 65). You see the Name: input field in the upperline of the display.If you now press the key, the complete list of phone bookentries saved on the communications system is displayed. Thelist is sorted alphabetically and you can page to the desiredentry.