СПИСОК патентов США - подгруппа МПК16 H04M3/24
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| № п/п | Номер патента | Название патента | |||
2017 | |||||
| 1 | 9565308 | System for communication routing | |||
| 2 | 9544817 | Pre-fetching of assets to user equipment | |||
2016 | |||||
| 3 | 9497583 | System and method for generating a recommendation on a mobile device | |||
| 4 | 9467339 | Testing toll-free data service campaigns | |||
| 5 | 9462495 | System and method for evaluating performance of concurrent mobile services of mobile devices | |||
| 6 | 9439012 | Method and apparatus for audio testing | |||
| 7 | 9438724 | Notification and troubleshooting of interruptions, failures, and updates | |||
| 8 | 9392106 | System and method for reducing power consumption in telecommunication systems | |||
| 9 | 9384121 | Functional test automation for gesture-based mobile applications | |||
| 10 | 9380162 | Graphical user interface and method for testing and visually representing telephony state | |||
| 11 | 9369593 | VOIP terminal and ringing parameter setting method therefor | |||
| 12 | 9368019 | Method for notifying one or more individuals about the presence of one or more occupants in a vehicle | |||
| 13 | 9282183 | Nodes and methods for monitoring of communication | |||
| 14 | 9271331 | Conditional execution of commands | |||
| 15 | 9270813 | Pre-installation frequency domain premises wiring tests | |||
| 16 | 9247054 | Systems and methods for generating and testing interactive voice response applications | |||
2015 | |||||
| 17 | 9154611 | Functional test automation for gesture-based mobile applications | |||
| 18 | 9071534 | DSL system estimation | |||
| 19 | 9060056 | Notification and troubleshooting of interruptions, failures, and updates | |||
| 20 | 8995977 | Distributed locater, alert, repeater, and/or call technologies for communication devices | |||
2014 | |||||
| 21 | 8786665 | Streaming a videoconference from a server including boundary information for client layout adjustment | |||
2013 | |||||
| 22 | 8615222 | System and method to detect PBX-mobility call failure | |||
| 23 | 8483673 | System and method to detect PBX-mobility call failure | |||
2012 | |||||
| 24 | 8306513 | System and method to detect PBX-mobility call failure | |||
| 25 | 8249237 | Heterogeneous video conferencing | |||
2011 | |||||
| 26 | 7949117 | Heterogeneous video conferencing | |||
2009 | |||||
| 27 | 7526800 | Administration of protection of data accessible by a mobile device | |||
| 28 | 7478022 | Component emulation device and method of design | |||
2007 | |||||
| 29 | 7305230 | System, apparatus, and method for providing a mobile server | |||
2006 | |||||
| 30 | 7020247 | Methods and systems for automated target error checking | |||
2005 | |||||
| 31 | 6954710 | Method and monitoring system for monitoring at least one subscriber line | |||
| 32 | 6922464 | System and method for hitless monitoring access of a communications circuit | |||
| 33 | 6914962 | Call-flow verification method and apparatus | |||
| 34 | 6888925 | Method for testing large-scale audio conference servers | |||
| 35 | 6870900 | Proactive maintenance application | |||
| 36 | 6847702 | Systems and methods for enhanced reliability in a communication system | |||
2004 | |||||
| 37 | 6826259 | Method for emulating a terminal and test apparatus for testing a telecommunication network | |||
| 38 | 6807416 | Troubleshooting method and apparatus | |||
| 39 | 6788765 | Clear defective pairs module for proactive maintenance application | |||
| 40 | 6778638 | Processes and systems for creating maintenance reports for communications systems | |||
| 41 | 6771739 | Pressure alarms and reports system module for proactive maintenance application | |||
| 42 | 6754204 | Systems and methods for enhanced reliability in a communication system | |||
| 43 | 6748552 | Stored program controlled switching system | |||
| 44 | 6738454 | Modular test instrument | |||
| 45 | 6711598 | Method and system for design and implementation of fixed-point filters for control and signal processing | |||
| 46 | 6687231 | System and method for ensuring operations of redundant signal paths in a communication system | |||
| 47 | 6678355 | Testing an operational support system (OSS) of an incumbent provider for compliance with a regulatory scheme | |||
2003 | |||||
| 48 | 6658090 | Method and system for software updating | |||
| 49 | 6636841 | System and method for telecommunications system fault diagnostics | |||
| 50 | 6636585 | Metrics-related testing of an operational support system (OSS) of an incumbent provider for compliance with a regulatory scheme | |||
| 51 | 6614882 | Proact module for proactive maintenance application | |||
| 52 | 6590963 | Modular test instrument | |||
| 53 | 6587543 | System and method for the automated testing of a telecommunications system | |||
| 54 | 6542599 | Subscriber system transmission apparatus with line concentrating capability | |||
| 55 | 6529583 | PSTN call simulator and method of operation for testing PSTN-To-IP network telephone services for individual and group internet clients prior to availability of the services | |||
| 56 | 6519324 | Method for recovering emergency calls at an operator station during a position failure | |||
| 57 | 6516052 | Method of scheduling connections | |||
| 58 | 6516051 | Testing voice message applications | |||
2002 | |||||
| 59 | 6498833 | Channel check test system | |||
| 60 | 6483909 | System and method for providing service assurance for prepaid telecommunication services | |||
| 61 | 6427000 | Performing automated testing using automatically generated logs | |||
| 62 | 6421323 | Method and apparatus for analyzing events in a telecommunications system | |||
| 63 | 6421322 | System and method for electronically identifying connections of a cross-connect system | |||
| 64 | 6400807 | Simulation of telephone handset | |||
| 65 | 6396904 | Method and apparatus for determining whether the immediate state of a telecommunications switch is adequate for a software upgrade | |||
| 66 | 6393101 | Method and apparatus for determining whether the advance state of a telecommunications switch is adequate for a software upgrade | |||
| 67 | 6385300 | Modular test instrument | |||
| 68 | 6366645 | System and method for providing service assurance for prepaid telecommunication services | |||
| 69 | 6363498 | Method and apparatus to automatically back up switching system files | |||
2001 | |||||
| 70 | 6324260 | Channel check test system | |||
| 71 | 6314531 | Method and system for testing and debugging distributed software systems by using network emulation | |||
| 72 | 6301355 | Method and apparatus for analyzing dual tone multi-frequency (DTMF) signals on a private branch exchange (PBX) switch | |||
| 73 | 6259768 | Method of, and apparatus for, carrying out loopback test in exchange | |||
| 74 | 6219643 | Method of analyzing dialogs in a natural language speech recognition system | |||
| 75 | 6215998 | Local component-specific console | |||
| 76 | 6205557 | Redundant call processing | |||
| 77 | 6192108 | Performing automated testing using automatically generated logs | |||
| 78 | 6185191 | Testing of ISDN line via auxiliary channel signaling | |||
2000 | |||||
| 79 | 6163595 | Way finding with an interactive faceplate | |||
| 80 | 6151514 | Method and apparatus for normalizing DTMF messages from a cellular mobile station | |||
| 81 | 6064721 | Modular test instrument | |||
| 82 | 6049590 | Telecommunications switch configuration | |||
| 83 | 6049553 | Method for transmitting information signals in a subscriber terminal network | |||
| 84 | 6026145 | Method and apparatus for fault segmentation in a telephone network | |||
| 85 | 6012152 | Software fault management system | |||
1999 | |||||
| 86 | 6002665 | Technique for realizing fault-tolerant ISDN PBX | |||
| 87 | 6000049 | Physical packaging position information processing system | |||
| 88 | 5960060 | Line tester for coin-operated telephones | |||
| 89 | 5956324 | Performance monitoring and test system for a telephone network | |||
| 90 | 5951701 | Detection of loop-back conditions on faulty digital trunks | |||
| 91 | 5920608 | Measurement device for communication | |||
| 92 | 5907674 | Method for removing program-related errors in program-controlled communications systems | |||
| 93 | 5897609 | Multiple port protocol test apparatus and method thereof | |||
| 94 | 5887051 | Listening device for tracing line continuity and detecting telephone dial tone | |||
| 95 | 5875217 | Delay adjustment circuit in a performance monitoring and test system | |||
| 96 | 5870451 | Method and apparatus for high impedance ringer detection | |||
1998 | |||||
| 97 | 5848128 | Telecommunications call preservation in the presence of control failure | |||
| 98 | 5838767 | Method of simulative testing stored program control type electronic automatic exchange | |||
| 99 | 5793956 | Method and system for testing an audiotex system | |||
| 100 | 5790531 | Method and apparatus for determining the origin of a remote alarm indication signal | |||
| 101 | 5774456 | Method and apparatus for adopting performance report messages in a telecommunications system | |||
| 102 | 5764726 | Telecommunications test system including a test and trouble shooting expert system | |||
| 103 | 5757776 | Method and apparatus for determining the origin of an alarm indication signal | |||
| 104 | 5757680 | Method and arrangement for configuring electronic device for multiple testing formats | |||
| 105 | 5748098 | Event correlation | |||
| 106 | 5737390 | Digital exchange system with function of displaying operation state of system | |||
| 107 | 5734696 | Testing telecommunications equipment | |||
| 108 | 5729588 | Enhanced recording verification system | |||
| 109 | 5712898 | D4 channel bank with multi-mode formatted, performance-monitoring communication bus | |||
| 110 | 5712897 | Fault detection in broadband cable systems | |||
| 111 | 5712896 | Method for diagnosing a fault of digital exchanger | |||
| 112 | 5706280 | Transmission quality monitoring system for a digital communication network | |||
1997 | |||||
| 113 | 5703871 | Facilities data link handler in a performance monitoring and test system | |||
| 114 | 5699402 | Method and apparatus for fault segmentation in a telephone network | |||
| 115 | 5696810 | Telephone line monitor/alarm | |||
| 116 | 5691976 | Performance monitoring and test system for a telephone network | |||
| 117 | 5689546 | Performance monitoring system for T1 telephone lines | |||
| 118 | 5668862 | Method and apparatus for providing user controlled call management services | |||
| 119 | 5666481 | Method and apparatus for resolving faults in communications networks | |||
| 120 | 5663968 | Margin test method and apparatus for intergrated services digital networks | |||
| 121 | 5661778 | Performance monitoring of DSO channel via D4 channel bank | |||
| 122 | 5623480 | System and method for accessing embedded channels | |||
| 123 | 5621720 | Multichannel alignment system and method | |||
| 124 | 5608644 | Method for supporting test routines | |||
| 125 | 5602828 | Protect path switching in a performance monitoring and test system | |||
| 126 | 5601460 | Gel filled modular electrical connecting block | |||
| 127 | 5598455 | Alarm and test system for a digital added main line | |||
| 128 | 5594904 | Tracing with keys and locks | |||
1996 | |||||
| 129 | 5583912 | Wireless - wireline communication selection mechanism resident in craftsperson's portable test and communications device | |||
| 130 | 5581228 | Digital signal comparison circuit in a performance monitoring and test system | |||
| 131 | 5574723 | Remote provisioning of telephone channel unit using inband digital code sequences transmitted over tandem link | |||
| 132 | 5572570 | Telecommunication system tester with voice recognition capability | |||
| 133 | 5566161 | Adaptive DS1 frame format conversion device for remotely monitoring and testing the performance of telephone circuits | |||
| 134 | 5562491 | Gel filled electrical connector | |||
| 135 | 5557616 | Frame synchronization in a performance monitoring and test system | |||
| 136 | 5557539 | Apparatus and method for testing an interactive voice messaging system | |||
| 137 | 5553056 | Packetized remote test system for a telephone network | |||
| 138 | 5548636 | Method and apparatus for providing user controlled call management services | |||
| 139 | 5539802 | System for testing the billing function in a telecommunication system | |||
| 140 | 5533093 | Automated trouble-shooting mechanism resident in craftsperson's portable test and communications device | |||
| 141 | 5533007 | ISDN line circuit monitor system | |||
| 142 | 5528660 | Display-based control mechanism resident in portable test and communications device for facilitating craftsperson's remote testing of selected portion of telephone network | |||
| 143 | 5521958 | Telecommunications test system including a test and trouble shooting expert system | |||
| 144 | 5521903 | Port system for interfacing digital PBX to digital transmission facility | |||
| 145 | 5511064 | Speech path switching control apparatus and method for making maintenance of speech possible upon occurrence of fault in echo cancellation | |||
| 146 | 5500853 | Relative synchronization system for a telephone network | |||
| 147 | 5495470 | Alarm correlation system for a telephone network | |||
| 148 | 5491695 | Means and method of dial up bridging of network for high bandwidth digital communication | |||
| 149 | 5488648 | Behavior monitoring and analyzing system for stored program controlled switching system | |||
1995 | |||||
| 150 | 5473665 | Performance monitoring of DS0 channel via D4 channel bank | |||
| 151 | 5471526 | Tracing with keys and locks on a telecommunication network | |||
| 152 | 5450569 | Method for the visualization of logged information in a communication system | |||
| 153 | 5450440 | Monitor system for digital communication apparatus | |||
| 154 | 5430708 | Control channel terminating interface and its testing device for sending and receiving signal | |||
| 155 | 5427547 | Gel filled modular electrical connecting block | |||
| 156 | 5418776 | Emergency local switching | |||
| 157 | 5414695 | Method for monitoring existing telephone connections, particularly permanently switched telephone connections | |||
| 158 | 5406702 | Method for sealing an electrical socket and plug assembly | |||
| 159 | 5406621 | Telephone tone analysis system | |||
| 160 | 5404449 | Interface module for supporting communication between processor systems | |||
| 161 | 5404401 | Alarm and test system for a digital added main line | |||
| 162 | 5400346 | Method for diagnosing conditions in a signal line | |||
| 163 | 5400266 | Error performance monitoring system for digital exchange circuit | |||
| 164 | 5398234 | DS-0 loop-back detection on a DS-1 line | |||
| 165 | 5390179 | Remote provisioning of telephone channel unit using inband digital code sequences transmitted over tandem link | |||
1994 | |||||
| 166 | 5376019 | Gel filled modular electrical connecting block | |||
| 167 | 5375117 | Maintenance communication control system in an ISDN service | |||
| 168 | 5369690 | Telephone call detecting circuit and a method of remotely accessing and testing a telephone | |||
| 169 | 5369680 | Pro-active billing and routing test set | |||
| 170 | 5349341 | Quad channel unit health registers with "OR" function means | |||
| 171 | 5347576 | Line interface unit retrofit circuit | |||
| 172 | 5347564 | Automated translation input system | |||
| 173 | 5345510 | Integrated speaker supervision and alarm system | |||
| 174 | 5337306 | Digital tandem channel unit interface for telecommunications network | |||
| 175 | 5337045 | Pattern generator | |||
| 176 | 5327433 | Digital tandem channel unit interface for telecommunications network | |||
| 177 | 5319631 | Method for measuring in the subscriber area of an integrated services digital network system | |||
| 178 | 5309498 | Maintenance unit for modular public telephone | |||
| 179 | 5297167 | Method and apparatus for detecting digital carrier signals on telephone cables | |||
| 180 | 5293556 | Knowledge based field replaceable unit management | |||
1993 | |||||
| 181 | 5270699 | Fault tolerant signaling | |||
| 182 | 5251299 | System for switching between processors in a multiprocessor system | |||
| 183 | 5247690 | Method for detecting transmitting control code using M our of N detection scheme for initiating a latching loopback test procedure | |||
| 184 | 5246383 | Gel filled electrical connector | |||
| 185 | 5241581 | Maintenance terminal of a validation and identification unit | |||
| 186 | 5222083 | Call progress monitoring | |||
| 187 | 5208846 | Subscriber loop tester for telephone switching systems | |||
| 188 | 5208803 | Circuit for testing digital lines | |||
| 189 | 5201045 | Arrangement and method of downloading data to a plurality of destinations in a digital telephone system | |||
| 190 | 5195125 | Gel filled RJ11 connector | |||
| 191 | 5189663 | Method of and system for remote testing and reporting of ISDN line conditions | |||
| 192 | 5187733 | Verification of subscriber lines prior to cutover to a new switching system | |||
| 193 | 5187732 | Board-to-board test unit for a digital subscriber line | |||
| 194 | 5187705 | Data error detecting apparatus for key telephone system and the detecting method therefor | |||
| 195 | 5187704 | Monitoring method for stand-by circuits suitable for a multiplexing/demultiplexing apparatus | |||
| 196 | 5185741 | Inter-network connecting system | |||
1992 | |||||
| 197 | 5173896 | T-carrier network simulator | |||
| 198 | 5166925 | T carrier network test apparatus and method | |||
| 199 | 5150402 | ISDN terminal having diagnostic function | |||
| 200 | 5146474 | Circuit arrangement for the routine testing of an interface between line terminator groups and the switching matrix network of a PCM telecommunication switching system | |||
| 201 | 5144625 | Digital subscriber line termination with signalling | |||
| 202 | 5140625 | System for testing 2B1Q telephony loopback circuits and method therefor | |||
| 203 | 5140614 | Method and apparatus for detecting digital carrier signals on telephone cables | |||
| 204 | 5138608 | Circuit arrangement for testing parts of a digital time-division telecommunication switching center, particularly a telephone switching center | |||
| 205 | 5111497 | Alarm and test system for a digital added main line | |||
| 206 | 5108315 | Pay telephone station repair technician's adapter | |||
| 207 | 5101400 | Dynamic circuit identifier | |||
1991 | |||||
| 208 | 5036318 | Modular ISDN communication system with formation and display of error texts | |||
| 209 | 5027358 | Switch-adjunct communications protocol | |||
| 210 | 5022070 | Switch-adjunct interface | |||
| 211 | 5018097 | Modularly structured digital communications system for interconnecting terminal equipment and public networks, and having operation and reliability programs | |||
| 212 | 5012465 | Interconnection system for interconnecting connection units and a central switching facility | |||
| 213 | 4996695 | Arrangement for accessing and testing telecommunication circuits | |||
| 214 | 4984262 | Digital service unit | |||
1990 | |||||
| 215 | 4980906 | Switch-adjunct interface | |||
| 216 | 4972453 | Autonomous expert system for directly maintaining remote telephone switching systems | |||
| 217 | 4967412 | Serial data frame generator for testing telecommunications circuits | |||
| 218 | 4959849 | End-to-end network surveillance | |||
| 219 | 4949355 | Test access system for a digital loop carrier system | |||
| 220 | 4926363 | Modular test structure for single chip digital exchange controller | |||
| 221 | 4922489 | Circuit configuration for routine testing of the clock supply of a large number of units operated with the same clock | |||
| 222 | 4920529 | Network control method and apparatus therefor | |||
| 223 | 4914572 | Method for operating an error protected multiprocessor central control unit in a switching system | |||
| 224 | 4912699 | Pulse code modulation terminal equipment | |||
| 225 | 4910760 | Network verification evaluation testing system | |||
| 226 | 4901003 | Telecommunications wiring test apparatus and method including two color display indicating correct wiring | |||
1989 | |||||
| 227 | 4881230 | Expert system for processing errors in a multiplex communications system | |||
| 228 | 4881229 | Test circuit arrangement for a communication network and test method using same | |||
| 229 | 4879739 | Wiring test device and method | |||
| 230 | 4873687 | Failing resource manager in a multiplex communication system | |||
| 231 | 4870638 | Remote maintenance system for a digital communication network | |||
| 232 | 4860281 | Individual subchannel loopback in the PCM interfaces of a digital telephone exchange with control of the outbound path | |||
| 233 | 4858223 | Security arrangement for a telecommunications exchange system | |||
| 234 | 4839916 | Telephone toll integrity checking system | |||
| 235 | 4837810 | Telephone switch center with control of individual devices | |||
| 236 | 4835766 | Monitoring system capable of monitoring a sequence of digital signals flowing through a subscriber line | |||
| 237 | 4817092 | Threshold alarms for processing errors in a multiplex communications system | |||
| 238 | 4807274 | Telephone line quality testing system | |||
| 239 | 4797875 | Method for monitoring and controlling the traffic in digital transmission networks | |||
1988 | |||||
| 240 | 4782506 | Arrangement for operating and maintaining a telecommunications system | |||
| 241 | 4777644 | Method and apparatus for testing telephone coin relays | |||
| 242 | 4768217 | Public telephone set | |||
| 243 | 4766594 | Digital network system having arrangement for testing digital subscriber line | |||
| 244 | 4764918 | Telecommunication switching system | |||
| 245 | 4755995 | Program update in duplicated switching systems | |||
| 246 | 4754480 | Circuit arrangement for telecommunication switching systems connected to line concentrator sub-exchanges by connecting channels | |||
| 247 | 4736444 | Pay telephone monitoring system | |||
| 248 | 4736402 | Signaling arrangement | |||
| 249 | 4730302 | Monitoring means for digital signal multiplex equipment | |||
1987 | |||||
| 250 | 4710952 | Distributed control type electronic switching system | |||
| 251 | 4692918 | Reliable local data network arrangement | |||
| 252 | 4688209 | Method and apparatus for looping around a digital transmission line at a channel unit | |||
| 253 | 4688208 | Time division exchange for carrying out a loop-back test | |||
| 254 | 4685102 | Switching system loopback test circuit | |||
| 255 | 4677665 | Method and apparatus for electronically detecting speech and tone | |||
| 256 | 4675862 | Loop around data channel unit | |||
| 257 | 4661971 | Digital signal cross-connection system | |||
| 258 | 4658395 | Method for locating faults in a carrier subscriber communication system | |||
| 259 | 4653043 | Pre-cutover verification of switching system subscriber lines served via digital carrier facilities | |||
1986 | |||||
| 260 | 4633459 | Repeater for carrier subscriber communication system | |||
| 261 | 4622438 | Subscriber line radio concentration system with automatic response for a loop back test | |||
| 262 | 4621354 | DTMF receiver sense and control maintenance arrangement | |||
| 263 | 4617663 | Interface testing of software systems | |||
| 264 | 4611320 | Programmable testing analyzer | |||
| 265 | 4596015 | Failure detection apparatus for use with digital pads | |||
| 266 | 4592044 | Apparatus and method for checking time slot integrity of a switching system | |||
| 267 | 4590583 | Coin telephone measurement circuitry | |||
| 268 | 4582965 | Coin trunk test set | |||
| 269 | 4575841 | Method and apparatus for through-connection testing in a digital telecommunication network | |||
| 270 | 4575839 | Centralized supervisory system | |||
| 271 | 4566093 | Continuity check tone detector for use with a digital telecommunication system | |||
1985 | |||||
| 272 | 4546475 | Parity checking arrangement | |||
| 273 | 4542507 | Apparatus for switch path verification | |||
| 274 | 4501003 | Dial pulse measurement circuitry | |||
| 275 | 4496800 | Ringing generator testing arrangement for a digital telephone network | |||
| 276 | 4495618 | Digital switching network | |||
| 277 | 4493073 | Maintenance of stored program controlled switching systems | |||
1984 | |||||
| 278 | 4466094 | Data capture arrangement for a conference circuit | |||
| 279 | 4466092 | Test data insertion arrangement for a conference circuit | |||
| 280 | 4430530 | Telephony system with automatic test call generator for remote port groups | |||
1983 | |||||
| 281 | 4417101 | Public telephone station traffic analyzing arrangement | |||
| 282 | 4415770 | Malfunction detection system for a mobile radio telephone system | |||
| 283 | 4412282 | Microprocessor control circuit | |||
| 284 | 4402074 | Switching network test system | |||
| 285 | 4392206 | Printer | |||
| 286 | 4388715 | Alarm preprocessor logic | |||
| 287 | 4387456 | Alarm monitoring arrangements for digital telecommunications switching networks | |||
| 288 | 4385230 | Digital temperature effect generator | |||
| 289 | 4384175 | Tone detection method and arrangement for observing and classifying repetitive status signals | |||
1982 | |||||
| 290 | 4366350 | Control system for telephone switching system | |||
| 291 | 4340788 | Method of and system for measuring electrical characteristics of circuit elements included in time-sharing telecommunication network | |||
| 292 | 4326103 | Coin telephone monitor circuit | |||
| 293 | 4320497 | Method for testing communication paths | |||
1981 | |||||
| 294 | 4302836 | Monitoring circuit for time-division switching network | |||
| 295 | 4300024 | Technique for measuring a duration of signaling pulses in a telephone circuit | |||
| 296 | 4295220 | Clock check circuits using delayed signals | |||
| 297 | 4278849 | Test arrangement for automatic number identification systems | |||
| 298 | 4276451 | Control system for telephone switching system | |||
| 299 | 4263482 | Public telephone station traffic analyzing arrangement | |||
| 300 | 4255623 | Apparatus for pulse train measurement | |||
1980 | |||||
| 301 | 4228328 | Signal distributor test arrangement | |||
| 302 | 4195206 | Path test apparatus and method | |||
1979 | |||||
| 303 | 4165450 | Telephone signalling test system | |||
| 304 | 4156110 | Data verifier | |||
| 305 | 4138599 | Modular communication system having self-identifying modules | |||
1978 | |||||
| 306 | 4092605 | Phase delay simulator | |||
| 307 | 4071704 | Service generator checking apparatus | |||
1977 | |||||
| 308 | 4048451 | Arrangement for monitoring live call disposition signals | |||
| 309 | 4039768 | Pay telephone station monitor system | |||
| 310 | 4022987 | Coin telephone station simulator and condition indicator | |||
1976 | |||||
| 311 | 3980839 | Maintenance monitor for telephone switching systems | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||