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![Fax, Modem, and Text Support over IP Configuration Guide, Cisco IOS Release 15M&T - Fax and Modem Services over IP Overview [Support] - Cisco](https://www.cisco.com/c/dam/en/us/td/i/000001-100000/70001-75000/72001-73000/72734.ps/_jcr_content/renditions/72734.jpg "Fax, Modem, and Text Support over IP Configuration Guide, Cisco IOS Release 15M&T - Fax and Modem Services over IP Overview [Support] - Cisco")