Image communicating apparatus

An image communicating apparatus comprising:

• a main control portion;
• a storing portion storing instructions which when executed cause the main control portion to act as:
• a packet control portion that transmits/receives an Internet Facsimile Protocol packet by a T.38 communicating function;
• and
• an image communicating control portion that describes a T.30 command and image information in a field of the Internet Facsimile Protocol packet to control an image communication,
• the packet control portion including:
• a counting unit that counts a total number of received packets and a number of loss packets in the Internet Facsimile Protocol packet in a receipt of the image information, and
• the image communicating control portion including:
• a calculating unit that calculates a loss ratio of the Internet Facsimile Protocol packet in the receipt of the image information from a rate of the number of loss packets to the total number of received packets which is counted by the counting unit in a receipt of a post message;
• and
• a response signal returning unit that returns a retraining negative signal to an apparatus on a transmitting side for the image information in response to the post message if the loss ratio calculated by the calculating unit exceeds a first threshold, returns a retraining positive signal to the apparatus on the transmitting side in response to the post message if the loss ratio is equal to or smaller than the first threshold and exceeds a second threshold which is smaller than the first threshold, and returns a message confirming signal to the apparatus on the transmitting side in response to the post message if the loss ratio is equal to or smaller than the second threshold;
• and
• a communication interrupting unit that interrupts a communication if the loss ratio calculated by the calculating unit exceeds a third threshold which is greater than the first threshold.

An image communicating apparatus comprising:

• a main control portion;
• a storing portion storing instructions which when executed cause the main control portion to act as:
• a packet control portion that transmits/receives an Internet Facsimile Protocol packet by a T.38 communicating function;
• and
• an image communicating control portion that describes a T.30 command and image information in a field of the Internet Facsimile Protocol packet to control an image communication,
• the packet control portion including:
• a counting unit that counts a maximum number of continuous loss packets in the Internet Facsimile Protocol packet in a receipt of the image information, and
• the image communicating control portion including:
• a response signal returning unit that returns a retraining negative signal to an apparatus on a transmitting side for the image information in response to a post message if the maximum number of continuous loss packets counted by the counting unit exceeds a first threshold, and returns a message confirming signal to the apparatus on the transmitting side in response to the post message if the maximum number of continuous loss packets counted by the counting unit is equal to or smaller than the first threshold in a receipt of the post message, wherein
• the Internet Facsimile Protocol packet is transmitted from the apparatus on the transmitting side with continuous numbers given thereto, and
• the counting unit counts the maximum number of continuous loss packets by counting a continuous number of missing numbers in the continuous numbers.

An image communicating apparatus comprising:

• a main control portion;
• a storing portion storing instructions which when executed cause the main control portion to act as:
• a packet control portion that transmits/receives an Internet Facsimile Protocol packet by a T.38 communicating function;
• and
• an image communicating control portion that describes a T.30 command and image information in a field of the Internet Facsimile Protocol packet to control an image communication,
• the packet control portion including:
• a counting unit that counts a maximum number of continuous loss packets in the Internet Facsimile Protocol packet in a receipt of the image information, and
• the image communicating control portion including:
• a response signal returning unit that returns a retraining negative signal to an apparatus on a transmitting side for the image information in response to a post message if the maximum number of continuous loss packets counted by the counting unit exceeds a first threshold, returns a retraining positive signal to the apparatus on the transmitting side in response to the post message if the maximum number of continuous loss packets is equal to or smaller than the first threshold and exceeds a second threshold which is smaller than the first threshold, and returns a message confirming signal to the apparatus on the transmitting side in response to the post message if the maximum number of continuous loss packets is equal to or smaller than the second threshold in a receipt of the post message, wherein
• the Internet Facsimile Protocol packet is transmitted from the apparatus on the transmitting side with continuous numbers given thereto, and
• the counting unit counts the maximum number of continuous loss packets by counting a continuous number of missing numbers in the continuous numbers.

An image communicating apparatus comprising:

• a main control portion;
• a storing portion storing instructions which when executed cause the main control portion to act as:
• a packet control portion that transmits/receives an Internet Facsimile Protocol packet by a T.38 communicating function;
• and
• an image communicating control portion that describes a T.30 command and image information in a field of the Internet Facsimile Protocol packet to control an image communication,
• the packet control portion including:
• a counting unit that counts a total number of received packets, a number of loss packets and a maximum number of continuous loss packets in the Internet Facsimile Protocol packet in a receipt of the image information, and
• the image communicating control portion including:
• a calculating unit that calculates a loss ratio of the Internet Facsimile Protocol packet in the receipt of the image information from a rate of the number of loss packets to the total number of received packets which is counted by the counting unit;
• and
• a response signal returning unit that returns a retraining negative signal to an apparatus on a transmitting side for the image information in response to the post message if the loss ratio calculated by the calculating unit exceeds a first threshold of the loss ratio or if the maximum number of continuous loss packets counted by the counting unit exceeds a first threshold of the maximum number of continuous loss packets, and returns a message confirming signal to the apparatus on the transmitting side in response to the post message if the loss ratio calculated by the calculating unit is equal to or smaller than the first threshold of the loss ratio and the maximum number of continuous loss packets counted by the counting unit is equal to or smaller than the first threshold of the maximum number of continuous loss packets;
• and
• a communication interrupting unit that interrupts a communication if the loss ratio calculated by the calculating unit exceeds a second threshold which is greater than the first threshold.

An image communicating apparatus comprising:

• a main control portion;
• a storing portion storing instructions which when executed cause the main control portion to act as:
• a packet control portion that transmits/receives an Internet Facsimile Protocol packet by a T.38 communicating function;
• and
• an image communicating control portion that describes a T.30 command and image information in a field of the Internet Facsimile Protocol packet to control an image communication,
• the packet control portion including:
• a counting unit that counts a total number of received packets, a number of loss packets and a maximum number of continuous loss packets in the Internet Facsimile Protocol packet in a receipt of the image information, and
• the image communicating control portion including:
• a calculating unit that calculates a loss ratio of the Internet Facsimile Protocol packet in the receipt of the image information from a rate of the number of loss packets to the total number of received packets which is counted by the counting unit in a receipt of a post message;
• and
• a response signal returning unit that returns a retraining negative signal to an apparatus on a transmitting side for the image information in response to the post message if the loss ratio calculated by the calculating unit exceeds a first threshold of the loss ratio or if the maximum number of continuous loss packets counted by the counting unit exceeds a first threshold of the maximum number of continuous loss packets, returns a retraining positive signal to the apparatus on the transmitting side in response to the post message if the loss ratio is equal to or smaller than the first threshold of the loss ratio and exceeds a second threshold of the loss ratio which is smaller than the first threshold of the loss ratio or if the maximum number of continuous loss packets is equal to or smaller than the first threshold of the maximum number of continuous loss packets and exceeds a second threshold of the maximum number of continuous loss packets which is smaller than the first threshold of the maximum number of continuous loss packets, and returns a message confirming signal to the apparatus on the transmitting side in response to the post message if the loss ratio is equal to or smaller than the second threshold of the loss ratio and the maximum number of continuous loss packets is equal to or smaller than the second threshold of the maximum number of continuous loss packets;
• and
• a communication interrupting unit that interrupts a communication if the loss ratio calculated by the calculating unit exceeds a third threshold which is greater than the first threshold.

An image communicating apparatus comprising:

• a main control portion;
• a storing portion storing instructions which when executed cause the main control portion to act as:
• a packet control portion that transmits/receives an Internet Facsimile Protocol packet by a T.38 communicating function;
• and
• an image communicating control portion that describes a T.30 command and image information in a field of the Internet Facsimile Protocol packet to control an image communication,
• the packet control portion including:
• a counting unit that counts a total number of received packets, a number of loss packets and a maximum number of continuous loss packets in the Internet Facsimile Protocol packet in a receipt of the image information, and
• the image communicating control portion including:
• a calculating unit that calculates a loss ratio of the Internet Facsimile Protocol packet in the receipt of the image information from a rate of the number of loss packets to the total number of received packets which is counted by the counting unit;
• a detecting unit that detects a number of transmission line errors obtained after decoding the Internet Facsimile Protocol packet;
• and
• a response signal returning unit that returns a retraining negative signal to an apparatus on a transmitting side for the image information in response to the post message if the number of transmission line errors detected by the detecting unit exceeds a first threshold of the number of transmission line errors, if the loss ratio calculated by the calculating unit exceeds a first threshold of the loss ratio or if the maximum number of continuous loss packets counted by the counting unit exceeds a first threshold of the maximum number of continuous loss packets, and returns a message confirming signal to the apparatus on the transmitting side in response to the post message if the number of transmission line errors detected by the detecting unit is equal to or smaller than the first threshold of the number of transmission line errors, the loss ratio calculated by the calculating unit is equal to or smaller than the first threshold of the loss ratio, and the maximum number of continuous loss packets counted by the counting unit is equal to or smaller than the first threshold of the maximum number of continuous loss packets.