When an incoming call is routed to the auto attendant, the Menu action has the facility to detect and redirect fax calls. This capability is enabled by including a number in the system fax number field via the Voicemail Pro Client, and adding 'F' as the tone to detect in the Menu action. From the Menu action, incoming calls presenting a fax tone will then follow the 'F' call flow route, which could be a transfer call to a fax server extension or hunt group.