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Command Communications Comswitch 7500 4-Port Phone/Fax Modem/Ans Machine Line Sharing DeviceCOMSWITCH 7500 4PORT PHONE/FAX MODEM/ANS MACHINE LINE SHARING DEVFeatures of Command Communications Comswitch 7500 4-Port Phone/Fax Modem/Ans Machine Line Sharing Device - 4 Port device (2 ports are linked) | - For use with devices such as telephones, answer..