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] (Menu) -> <System Settings> -> <Communication Management Settings> -> <Fax Settings> -> <R-Key Setting>| 
								 PSTN 
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								 Select if your machine is connected to an outside line. 
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								 PBX 
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								 Prefix, Hooking 
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								 Select a type for <PBX>. 
								When <Prefix> is selected, set the prefix code (up to 20 digits) using numeric keys, [ 
							 ] (Tone), and [ ] (Symbols), and then enter [ ] (Recall/Pause). |