A printing apparatus is provided such that when a print processing apparatus is connected to the printing apparatus, use of Wi-Fi Direct is prohibited. On the other hand, in the printing apparatus, when the print processing apparatus is not connected to the printing apparatus, the use of Wi-Fi Direct is permitted.

A print processing apparatus is provided such that when a print processing apparatus is connected to a printing apparatus, use of Wi-Fi Direct is prohibited. On the other hand, in the printing apparatus, when the print processing apparatus is not connected to the printing apparatus, the use of Wi-Fi Direct is permitted.

A process, machine-readable instructions, and a system are described in which two communication sessions are attempted to be established between a client application and an image processing apparatus. In some examples, the first communication session is permitted while delaying the operation of the second communication session until the first communication session has completed.

The present invention provides a technique that enables an image communication apparatus capable of performing voice communication and T.30 in-band FAX communication over the IP network to positively detect a CNG signal and achieve switching to FAX reception in the answerphone connection mode and the FAX/TEL-switching mode. The communication apparatus includes a MODEM that controls facsimile communication and a SLIC that controls a telephone. A selector includes switches for connecting the IP network and the MODEM, and switches for connecting the IP network and the SLIC. A CPU controls the switches of the selector such that signals from the IP network are supplied to both of the MODEM and the SLIC.

An image forming apparatus includes a first connection portion, a second connection portion, a communication processing portion, a switch processing portion, and a connection determination processing portion. To the switch processing portion, the first connection portion and the second connection portion are connected in parallel. The switch processing portion breaks a communication path between the second connection portion and the switch processing portion when the facsimile communication process is executed by the communication processing portion. The connection determination processing portion, when a predetermined determination start condition is satisfied, causes the switch processing portion to break the communication path, and then when a predetermined line voltage is applied to the switch processing portion, determines that a connection between the first connection portion and the public switched telephone network is normal.

When a print processing apparatus is connected to a printing apparatus, use of Wi-Fi Direct is prohibited. On the other hand, when the print processing apparatus is not connected to the printing apparatus, the use of Wi-Fi Direct is permitted.

The present invention provides a technique that enables an image communication apparatus capable of performing voice communication and T.30 in-band FAX communication over the IP network to positively detect a CNG signal and achieve switching to FAX reception in the answerphone connection mode and the FAX/TEL-switching mode. The communication apparatus includes a MODEM that controls facsimile communication and a SLIC that controls a telephone. A selector includes switches for connecting the IP network and the MODEM, and switches for connecting the IP network and the SLIC. A CPU controls the switches of the selector such that signals from the IP network are supplied to both of the MODEM and the SLIC.

An image forming apparatus includes a first connection portion, a second connection portion, a communication processing portion, a switch processing portion, and a connection determination processing portion. To the switch processing portion, the first connection portion and the second connection portion are connected in parallel. The switch processing portion breaks a communication path between the second connection portion and the switch processing portion when the facsimile communication process is executed by the communication processing portion. The connection determination processing portion, when a predetermined determination start condition is satisfied, causes the switch processing portion to break the communication path, and then when a predetermined line voltage is applied to the switch processing portion, determines that a connection between the first connection portion and the public switched telephone network is normal.

The present invention provides a technique that enables an image communication apparatus capable of performing voice communication and T.30 in-band FAX communication over the IP network to positively detect a CNG signal and achieve switching to FAX reception in the answerphone connection mode and the FAX/TEL-switching mode. The communication apparatus includes a MODEM that controls facsimile communication and a SLIC that controls a telephone. A selector includes switches for connecting the IP network and the MODEM, and switches for connecting the IP network and the SLIC. A CPU controls the switches of the selector such that signals from the IP network are supplied to both of the MODEM and the SLIC.