First line is included
BlueSeries Fax is delivered with one (1) fax line. Additional fax lines must be ordered separately. Count one (1) external fax modem per telephone line.

Multiple fax lines It is possible to operate multiple TCP/IP fax lines from the same IBM i™ and distribute the fax line lines on different locations. Each location must however have its own Device Server and fax modems. You will need one fax modem per fax line. The different connection forms can be combined. You can connect as many fax lines you want.

Connecting Lines to Internal IBM i™ Modems for Fax Capabilities
The internal IBM i™ modems can (depending on type) connect direct with one to four telephone lines. The internal modem must be ordered/installed with fax capabilities. Multiple internal modems can be installed in your IBM i™. Check with your hardware supplier.