Image communication apparatus, method of controlling the same, and storage medium

A non-transitory computer-readable storage medium storing a program for causing a computer to function as an image communication apparatus capable of performing a call and a facsimile communication via an IP network, the apparatus comprising:

• at least two modems;
• an SLIC that connects a telephone apparatus:
• a determination unit configured to determine whether or not an establishment of a session is possible when an INVITE signal, for which a media type is audio, is received;
• and
• a control unit configured to control so that in an automatic reception mode, when the determination unit determines that the establishment of a session is possible, a usable modem is selected from out of the at least two modems, and treated as audio communication is performed using the selected modem;
• so that when the determination unit determines that the establishment of a session is possible, it is determined whether or not the SLIC is in use, and when the SLIC is not in use, a call of the telephone apparatus is performed by the SLIC.