Image communication apparatus, method for controlling image communication apparatus, and storage medium

An image communication apparatus which is connectable to a telephone line and has a caller ID display function, the image communication apparatus comprising:

• an off-hook unit configured to perform off-hook using a hook key in an operation unit;
• a first receiving unit configured to receive a terminal activation signal that arrives via the telephone line;
• a second receiving unit configured to receive an information service signal, which arrives via the telephone line and includes a telephone number, after the first receiving unit has received the terminal activation signal;
• and
• a control unit configured to inhibit the off-hook by the off-hook unit from before the first receiving unit receives the terminal activation signal,
• wherein the control unit allows the off-hook by the off-hook unit based on the reception of the information service signal by the second receiving unit after the control unit inhibits the off-hook by the off-hook unit.

A method for controlling an image communication apparatus which is connectable to a telephone line, the image communication apparatus including an off-hook unit configured to perform off-hook using a hook key in an operation unit, and having a caller ID display function, the control method comprising:

• detecting polarity reversal of the telephone line;
• receiving an information service signal including a telephone number, which arrives via the telephone line, after the polarity reversal has been detected by the detecting;
• inhibiting the off-hook by the off-hook unit based on the detection of the polarity reversal by the detecting,
• wherein the off-hook by the off-hook unit is inhibited based on reception of the information service signal after the off-hook by the off-hook unit is inhibited.

A non-transitory computer readable storage medium storing a program for causing a computer to execute a method for controlling an image communication apparatus which is connectable to a telephone line, the image communication apparatus including an off-hook unit configured to perform off-hook using a hook key in an operation unit, and having a caller ID display function, the control method comprising:

• detecting polarity reversal of the telephone line;
• receiving an information service signal, which arrives via the telephone line and includes a telephone number, after the polarity reversal has been detected by the detecting;
• inhibiting the off-hook by the off-hook unit based on the detection of the polarity reversal by the detecting,
• wherein the off-hook by the off-hook unit is allowed based on reception of the information service signal after the off-hook by the off-hook unit is inhibited.