You can use any hybrid station port. Only one line can be set for fax detection. If it is part of a hunt, fax calls could end up coming in on other lines and they will ring the same as a voice call. The system has to hear the CNG tone in order to ring to the fax station (107), or it will be handled the same as a voice call by the system and ring accordingly.

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"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.