Abstract: An SS7 Network Preventative Maintenance System for detecting potential SS7 and switched network troubles, automatically analyzing the troubles, providing alarm and corrective action to avoid major network events. Real time monitors on SS7 links at the STP provide information on exceeded link load, exceeded Message Signaling Unit (MSU) frequency and network management status/error conditions in a Stage 1 Process. The Stage 1 Process provides alarm information to a Stage 2 Process which controls all Stage 1 associated monitors for an STP pair. Stage 2 reacts to Stage 1 signals to generate alarm and corrective action information which is passed on to a Stage 3 Process. The Stage 3 Process controls all Stage 2 Processes in the operating company. Stage 3 reacts to Stage 2 output to detect potential or real accompanying network trouble and generates alarm and corrective action information and displays in response thereto. Stage 3 also alerts a Stage 4 process which is connected to all Stage 3 Processes in a region.

Abstract: An SS7 Network Preventative Maintenance System for detecting potential SS7 and switched network troubles, automatically analyzing the troubles, providing alarm and corrective action to avoid major network events. Real time monitors on SS7 links at the STP provide information on exceeded link load, exceeded Message Signaling Unit (MSU) frequency and network management status/error conditions in a Stage 1 Process. The Stage 1 Process provides alarm information to a Stage 2 Process which controls all Stage 1 associated monitors for an STP pair. Stage 2 reacts to Stage 1 signals to generate alarm and corrective action information which is passed on to a Stage 3 Process. The Stage 3 Process controls all Stage 2 Processes in the operating company. Stage 3 reacts to Stage 2 output to detect potential or real accompanying network trouble and generates alarm and corrective action information and displays in response thereto. Stage 3 also alerts a Stage 4 process which is connected to all Stage 3 Processes in a region.

Abstract: An SS7 Network Preventative Maintenance System for detecting potential SS7 and switched network troubles, automatically analyzing the troubles, providing alarm and corrective action to avoid major network events. Real time monitors on SS7 links at the STP provide information on exceeded link load, exceeded Message Signaling Unit (MSU) frequency and network management status/error conditions in a Stage 1 Process. The Stage 1 Process provides alarm information to a Stage 2 Process which controls all Stage 1 associated monitors for an STP pair. Stage 2 reacts to Stage 1 signals to generate alarm and corrective action information which is passed on to a Stage 3 Process. The Stage 3 Process controls all Stage 2 Processes in the operating company. Stage 3 reacts to Stage 2 output to detect potential or real accompanying network trouble and generates alarm and corrective action information and displays in response thereto. Stage 3 also alerts a Stage 4 process which is connected to all Stage 3 Processes in a region.

Abstract: An SS7 Network Preventative Maintenance System for detecting potential SS7 and switched network troubles, automatically analyzing the troubles, providing alarm and corrective action to avoid major network events. Real time monitors on SS7 links at the STP provide information on exceeded link load, exceeded Message Signaling Unit (MSU) frequency and network management status/error conditions in a Stage 1 Process. The Stage 1 Process provides alarm information to a Stage 2 Process which controls all Stage 1 associated monitors for an STP pair. Stage 2 reacts to Stage 1 signals to generate alarm and corrective action information which is passed on to a Stage 3 Process. The Stage 3 Process controls all Stage 2 Processes in the operating company. Stage 3 reacts to Stage 2 output to detect potential or real accompanying network trouble and generates alarm and corrective action information and displays in response thereto. Stage 3 also alerts a Stage 4 process which is connected to all Stage 3 Processes in a region.

Abstract: An SS7 Network Preventative Maintenance System for detecting potential SS7 and switched network troubles, automatically analyzing the troubles, providing alarm and corrective action to avoid major network events. Real time monitors on SS7 links at the STP provide information on exceeded link load, exceeded Message Signaling Unit (MSU) frequency and network management status/error conditions in a Stage 1 Process. The Stage 1 Process provides alarm information to a Stage 2 Process which controls all Stage 1 associated monitors for an STP pair. Stage 2 reacts to Stage 1 signals to generate alarm and corrective action information which is passed on to a Stage 3 Process. The Stage 3 Process controls all Stage 2 Processes in the operating company. Stage 3 reacts to Stage 2 output to detect potential or real accompanying network trouble and generates alarm and corrective action information and displays in response thereto. Stage 3 also alerts a Stage 4 process which is connected to all Stage 3 Processes in a region.

Abstract: In a switched telecommunications network having multiple SPC switches connected to one another by trunks and connected to signal transfer points (STPs) by common channel signal (CCS) links, dual port protocol analyzer and control (DIAC) devices are situated at two STPs which are connected together by control and data communication links. One input of one of the DIAC device is connected through a first CCS link to a switch to be monitored and the second input of the DIAC device is connected via the data communication link to the second STP and from the second STP via a CCS link to the switch to be monitored to provide at the DIAC device a simultaneous presentation of CCS signals appearing at the terminations of the CCS links at the switch to be monitored.

Abstract: A telecommunications network testing and protocol analyzer arrangement including an improved control and port selecting circuitry which may be provided in the form of a board which plugs into a standard IBM or IBM compatible PC, XT, AT expansion bus (8 bits) and allows for the operate, non-operate control of up to 180 port relays while at the same time providing 8 simultaneous control outputs for other circuit and parameter control functions. All outputs are standard TTL level outputs which may be directly utilized as relay drivers. The selector and control board is controlled by software running under standard PC DOS of MS DOS. The control and selector board may be controlled completely from the computer keyboard as well as from a remote IBM or IBM compatible computer.

Abstract: Protocol analysis circuitry is provided at a site at which a plurality of private line data circuits are interconnected with one or more trunk lines. The analysis circuitry is wired into each of the data circuits and trunk lines through appropriate jacks on a continuous long-term basis. A programmed personal computer is installed at the site for control of the analysis circuitry and selection of the circuit to be tested. Monitored data and analysis data can be stored in computer memory. Telephone access to the test site permits interaction between the site computer and a distant computer located, for example at a maintenance facility. Selection of the circuit to be tested and definition of network parameters to be measured can, therefore, be done remotely. The on site computer is provided with facsimile format capability so that stored data automatically can be communicated from the test site, through a telephone line, to a facsimile machine at the remote facility.

Abstract: In an integrated services digital network (ISDN), a selected customer ISDN line at a central office is tested by remote control from an ISDN testing facility so that it is unnecessary to dispatch service personnel to the office to carry out the test. At least D-channel data from the ISDN line to be tested is obtained from the standard U-interface bus, accessed at the central office using the line card sparing feature of a standard integrated services line unit (ISLU). The D-channel data is applied to a personal computer at the central office, programmed to carry out protocol analysis and to supply at least one of data indicative of the protocol analysis and raw data used to perform the protocol analysis to a report communication line. Another computer at the ISDN test facility controls the operation of the computer at the central office over a dedicated communication line.

Abstract: In an integrated services digital network (ISDN), a selected customer ISDN line at a central office is tested by remote control from an ISDN testing facility so that it is unnecessary to dispatch service personnel to the office to carry out the test. At last D-channel data from the ISDN line to be tested is obtained from the standard U-interface bus, accessed at the central office using the line card sparing feature of a standard integrated services line unit (ISLU). The D-channel data is applied to a personal computer at the central office, programmed to carry out protocol analysis. Another computer at the ISDN test facility controls the operation of the computer at the central office over a dedicated communication line.