Calling a number from the system directory
Your terminal has access to a system directory of external numbers, using short codes.
Simply dial the short code.
Intrusion into an internal conversation
If you ring an internal number and find it busy, you may be able to intrude in the conversation. This only applies if you have authority to do so, and if that terminal is not "protected".
Dial the code for the "Intrusion" function. The display will announce that you have cut in.
If one of the three participants hangs up, the other two remain in contact.
Protecting yourself against intrusion
Dial the code for the "Protection against beeps" function and make your call. This protection ceases to apply once you hang up.
Calling a correspondent on his loudspeaker
If your internal correspondent does not reply, you may (if you have the authority to do so) "unhook" his phone by remote control.
Dial the code for the "Call announcement" function.
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