Abstract: A measurement apparatus includes a communication device configured to obtain a packet being transmitted between a server apparatus and a communication apparatus in a network, a memory, and a processor coupled to the memory and configured to calculate round-trip time between the communication apparatus and the server apparatus, and measure a data transfer rate between the communication apparatus and the server apparatus based on a data volume included in a second packet having a length equal to or greater than the threshold and transmitted to the communication apparatus from the server apparatus, a period of time from time at which the second packet is acquired to time at which an acknowledgement packet transmitted in response to the second packet is acquired, and the round-trip time.

Abstract: A monitoring apparatus includes a processor configured to capture a network transmission signal from a monitoring location in a monitoring target network; specify each of a plurality of sessions based on session specifying information contained in the captured network transmission signal; analyze, for specified each of the sessions, the network transmission signal and measure a quality index; transfer the quality index of each of the sessions, which is measured every predetermined period of time, as a quality measurement result to an aggregation apparatus until a predetermined threshold value of a processing capability is reached; and stop, when the predetermined threshold value of the processing capability is exceeded, measuring the quality index of one of the sessions in a high-load state, and in a next cycle, perform the measurement on one of the sessions in the high-load state.

Abstract: An information processing apparatus that is capable of communicating with a plurality of servers includes: a storage unit to store a network response table describing a network response time, the network response time being a time period from transmission of a request to establish a connection to a server to reception of a response to the request to establish the connection, and a server response table describing a server response time, the server response time being a time period from transmission of a request to write data to the server to reception of a response indicating a completion of writing the data; and a processor to generate pieces of divided data by dividing writing data, select, in accordance with the network response time or the server response time, saving servers, and transmit the pieces of the divided data to the saving servers.

Abstract: A monitoring apparatus includes a processor configured to capture a network transmission signal from a monitoring location in a monitoring target network; specify each of a plurality of sessions based on session specifying information contained in the captured network transmission signal; analyze, for specified each of the sessions, the network transmission signal and measure a quality index; transfer the quality index of each of the sessions, which is measured every predetermined period of time, as a quality measurement result to an aggregation apparatus until a predetermined threshold value of a processing capability is reached; and stop, when the predetermined threshold value of the processing capability is exceeded, measuring the quality index of one of the sessions in a high-load state, and in a next cycle, perform the measurement on one of the sessions in the high-load state.

Abstract: An apparatus for measuring network quality by use of packets exchanged between a transmission apparatus and a reception apparatus serving as agents arranged in a network includes a unit configured to acquire from the reception apparatus a transmission timing corresponding to a worst quality that is determined by the reception apparatus based on quality data collection packets, the quality data collection packets being transmitted from the transmission apparatus at transmission timing that is successively changed, a unit configured to notify the transmission apparatus of the acquired transmission timing as a transmission timing for transmitting a quality measurement packet, a unit configured to acquire quality information from the reception apparatus, the quality information being measured by the reception apparatus based on the quality measurement packet transmitted from the transmission apparatus, and a unit configured to check the network quality based on the acquired quality information.

Abstract: A management server that includes a signal control unit for controlling a signal for a packet for measuring communication quality, and a signal communication quality measurement unit that measures communication quality of a signal based on a result of signal control by the signal control unit; and a communication quality measurement device includes a payload control unit for controlling payload of packets for communication quality measurement and a payload communication quality measurement unit that measures communication quality of payload based on a result of payload control by payload control unit.

Abstract: A voice-quality evaluating system, in a secure network that allows a voice packet to pass, transmits and receives communication information for a voice quality testing between a test management apparatus and a test communication apparatus connected to the network and between the test communication apparatuses, for the voice quality testing between the test communication apparatuses arranged on the network. The voice-quality evaluating system embeds the communication information in a payload of the voice packet, and transmits and receives communication-information-embedded voice packet.

Abstract: A transmission quality measurement method for measuring the transmission quality of data packets received via a network. The method includes storing reference data packets into a storage unit, receiving data packets produced by use of the reference data, identifying, based on the reference data, a data area in the received data packets corresponding to the reference data, and comparing data corresponding to the identified data area with the reference data and thereby measuring the transmission quality of the data.

Abstract: A packet measuring system and method for sending and receiving a test packet between a plurality of probes located in networks of different protocols. The system includes a packet sending unit for embedding communication information used for a transmission quality measurement in a payload field of a test packet and sending the test packet to an opposite probe, and a packet extracting unit for receiving the test packet sent by the opposite probe and extracting the communication information from the payload field of the test packet.

Abstract: An apparatus for measuring network quality by use of packets exchanged between a transmission apparatus and a reception apparatus serving as agents arranged in a network includes a unit configured to acquire from the reception apparatus a transmission timing corresponding to a worst quality that is determined by the reception apparatus based on quality data collection packets, the quality data collection packets being transmitted from the transmission apparatus at transmission timing that is successively changed, a unit configured to notify the transmission apparatus of the acquired transmission timing as a transmission timing for transmitting a quality measurement packet, a unit configured to acquire quality information from the reception apparatus, the quality information being measured by the reception apparatus based on the quality measurement packet transmitted from the transmission apparatus, and a unit configured to check the network quality based on the acquired quality information.

Abstract: A management server that includes a signal control unit for controlling a signal for a packet for measuring communication quality, and a signal communication quality measurement unit that measures communication quality of a signal based on a result of signal control by the signal control unit; and a communication quality measurement device includes a payload control unit for controlling payload of packets for communication quality measurement and a payload communication quality measurement unit that measures communication quality of payload based on a result of payload control by payload control unit.

Abstract: According an aspect of the embodiment, there is provided a method for managing management target devices each connected to a computer network and managed by one of a plurality of management servers. A management server list storing IP addresses of the plurality of management servers is provided. A hop count defined as the number of hops, in the computer network, from the management target device to the each of the plurality of management servers is obtained and a management server having the smallest hop count among the plurality of management servers is selected as an optimum management server. Then, the management target device is managed under the control of the selected optimum management server.

Abstract: A transmission quality measurement method for measuring the transmission quality of data packets received via a network. The method includes storing reference data packets into a storage unit, receiving data packets produced by use of the reference data, identifying, based on the reference data, a data area in the received data packets corresponding to the reference data, and comparing data corresponding to the identified data area with the reference data and thereby measuring the transmission quality of the data.

Abstract: A packet measuring system and method for sending and receiving a test packet between a plurality of probes located in networks of different protocols. The system includes a packet sending unit for embedding communication information used for a transmission quality measurement in a payload field of a test packet and sending the test packet to an opposite probe, and a packet extracting unit for receiving the test packet sent by the opposite probe and extracting the communication information from the payload field of the test packet.

Abstract: An internet traffic controller controls internet traffic in an internet protocol network through which packets are distributed for telephone calls between a first communication device and a second communication device. The internet traffic controller acquires call control packets and call packets flowing on a transmission line between the first communication device and the second communication device, determines whether the transmission line is congested based on the acquired packets, and instructs to regulate call connections in the transmission line when the transmission line is determined to be congested.

Abstract: A voice-quality evaluating system, in a secure network that allows a voice packet to pass, transmits and receives communication information for a voice quality testing between a test management apparatus and a test communication apparatus connected to the network and between the test communication apparatuses, for the voice quality testing between the test communication apparatuses arranged on the network. The voice-quality evaluating system embeds the communication information in a payload of the voice packet, and transmits and receives communication-information-embedded voice packet.

Abstract: A channel reservation control system which reserves data channels in an appropriate manner to ensure the subsequent call set-up operations in automatic call distribution services. A channel allocation unit determines how many data channels should be reserved for a specific group of subscribers who may wish to use such reserved bandwidth. Then, a reservation request transmission unit makes a provisional reservation for as many data channels as determined by the channel allocation unit, and transmits a reservation request message to initiate the reservation of those data channels. Upon receipt of this reservation request message, a recipient-side reservation unit establishes channel reservation on the side of call recipients by securing the requested data channels for exclusive use by the specific group of subscribers.

Abstract: A system for controlling automatic call distribution service in a network in which call processing systems are connected via a control channel and a communication channel includes a pseudo-ACD-call-placement requesting unit which sends a request for pseudo-ACD-call placement from a control station to satellite stations via the control channel, wherein the control station is one of the call processing systems that receives a call from an exterior of the network, and satellite stations are the call processing systems other than the control station, a pseudo-ACD-call-placement-request accepting unit which accepts the request at the satellite stations so that a pseudo-ACD call is placed in queue in the satellite stations, and an inter-station-communication-path establishing unit which establishes a communication path via the communication channel between the control station and one of the satellite stations when the one of the satellite stations has an available receiver to respond to the pseudo-ACD call placed i