Oki Electric Industry Co., Ltd.

Rika Kamimura

Takashi Noda

Katsutoshi Tajiri

A communication connecting device includes a terminal unit controller for temporarily storing data received from a sending terminal unit. A packetizer/depacketizer collectively codes the data sequentially read out in accordance with size information fed from a size information storage. The packetizer/depacketizer determines whether or not the current data is the last one of a continues sequence of data and delivers, if the answer of the decision is positive, a detection signal to a frequency-of-transmission monitor. A UDPTL controller feeds additional data read out of the buffer to the frequency-of-transmission monitor in accordance with ITU-T Recommendation T.38. In response to the detection signal, the monitor outputs a control signal such that the coded data not sent a preselected number of times are repeatedly read out of the buffer and retransmitted the preselected number of times.

Communication connecting device capable of reliably transmitting data to an IP network and a data transmission control method

In an Internet facsimile apparatus, a facsimile controller temporarily stores data received from a G3 (Group 3) facsimile apparatus or the other terminal unit to communicate with. A packetizer/depacketizer packetizes the data sequentially read out in accordance with size information fed from a size information storage and feeds the resulting packets to a UDPTL controller and a buffer. The packetizer/depacketizer determines whether data received from the other terminal unit and decoded is a response to data sent from the G3 facsimile apparatus or retransmitted data, and delivers a response detection signal representative of the result of decision to the UDPTL controller. In the UDPTL controller, a filtering circuit deletes stored past data in accordance with the response detection signal representative of a response. The apparatus reduces a load on an IP (Internet Protocol) network.

Communication connecting device capable of reducing a load on an IP network and a data output control method

During G3FAX communication with an IP network, a FAX adaptercontrols a packet size data storagewith the use of a control signal, generated by a packet size controller, to adjust the packet size of FAX data sent from a G3FAXaccording to delay informationfrom the IP network. When sending data to the IP network, the adapterallows the size of a packet to be adjusted in response to the delay informationsent from the IP network, thus resolving a discrepancy in transfer speed.

Network interface apparatus for controlling the size, coupling or transfer rate of packets on the basis of an IP network delay and a method therefor

A communication connecting device includes a terminal unit controller for temporarily storing data received from a sending terminal unit. A packetizer/depacketizer collectively codes the data sequentially read out in accordance with size information fed from a size information storage. The packetizer/depacketizer determines whether or not the data is control data and delivers, if the answer of the decision is positive, a notification control signal to a control data monitor. A UDPTL (facsimile User Datagram Protocol Transport Layer protocol) controller feeds a UDPTL packet input from the packetizer/depacketizer to the control data monitor in accordance with ITU-T (International Telecommunication Union-Telecommunication standardization sector) Recommendation T.38. The control data monitor repeatedly sends the UDPTL packet on the basis of the notification control signal.

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Tokyo, Japan

Rika Kamimura