| ReturnTo Theme-Group-Choice | Onelevelup |
| 5K035 | Maintenance and management of digital transmission | |
| H04L41/00 -43/55 | ||
| H04L13/00,311-13/00,315@Z | AA | AA00 PURPOSE AND EFFECTS |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | |||
| . High-speed processing | . Reduction of the processor load | . Improved maintenance reliability | . Maintenance of structural economics | . Operating economics | . Improved user service | . . Ease of maintenance | ||||||
| BB | BB00 FORMS OF COMMUNICATION SYSTEMS |
BB01 | BB02 | BB03 | BB04 | |||||||
| . Communications between paired stations | . Multiple stations to one station | . Communications between multiple stations | . Systems wherein the exchange networks are connected | |||||||||
| CC | CC00 STRUCTURAL ELEMENTS OF COMMUNICATION SYSTEMS TO BE MONITORED AND TESTED |
CC01 | CC03 | CC04 | CC05 | CC06 | CC07 | CC08 | CC09 | CC10 | ||
| . Central processing units (CPU) | . Communication control units | . . Common control units | . . Line-handling devices or line-connecting devices | . Line terminal devices | . Modems | . Transmission paths | . Intermediate stations or repeater stations | . Terminal or input/output devices | ||||
| DD | DD00 OPERATING STATUS OF THE COMMUNICATION SYSTEM DURING MONITORING AND TESTING |
DD01 | DD02 | DD03 | ||||||||
| . Status during operation of the communication system | . . Partial operation or partial stoppage | . Status when the entire communication system is stopped | ||||||||||
| EE | EE00 ARTICLES TO BE MONITORED AND TESTED |
EE01 | EE02 | EE03 | EE04 | EE05 | EE06 | EE07 | EE08 | EE09 | EE10 | |
| . Protocol status | . . Data formats | . . . Protocol control information | . . . Physical level characteristics or waveform characteristics | . . . . Pulse spacing | . . . . Character spacing | . . Signal send-and-receive procedures | . . . Connection control procedures | . . . Transfer control procedures | . . . . Synchronized signals | |||
| EE11 | EE12 | EE13 | EE14 | |||||||||
| . . . . Time-fill signals | . . Interfaces between modems and line terminal devices | . . Protocols at multiple levels | . Connection between devices in the same location | |||||||||
| EE21 | EE22 | EE23 | EE24 | EE25 | EE26 | EE27 | ||||||
| . Status of the system load | . . Volume of the processor load | . . . Volume of buffer use | . . . Status of the generation of interrupt signals | . . Traffic volume | . Jumps to specific addresses | . Power source abnormalities or power failures | ||||||
| FF | FF00 STRUCTURAL ELEMENTS OF COMMUNICATION SYSTEMS THAT PERFORM MONITORING AND TESTING OPERATIONS |
FF01 | FF02 | FF03 | FF04 | |||||||
| . Central processing units (CPU) | . Communication controllers | . Modems | . Terminals | |||||||||
| GG | GG00 DEVICES AND MEANS USED FOR MONITORING AND TESTING |
GG01 | GG02 | GG03 | GG04 | GG05 | GG06 | GG07 | GG08 | GG09 | GG10 | |
| . Test-signal generators | . . Generation of data patterns or dummy data | . . . Switching and generation of different signals | . . . Addition of errors | . . Sending of dummy data and reception of response data | . Use of a repeating means | . . Intrastation repetition | . . Intermediate station repetition | . . Target terminal repetition | . . Sending of repetition control signals | |||
| GG11 | GG12 | GG13 | GG14 | GG15 | ||||||||
| . . . Back-to-back positions or mode transmissions | . . Use of pseudorandom number (PN) signals | . Means of connecting monitoring or testing devices | . . Branching from lines | . . Switching or replacing of the connections | ||||||||
| HH | HH00 CONTROL OF MONITORING AND TESTING |
HH01 | HH02 | HH03 | HH04 | HH05 | HH06 | HH07 | HH08 | HH09 | ||
| . Start commands | . . Programs | . . Manual operation | . . Origination or termination calls | . . Commands when power is turned on | . Control of the execution procedure | . . Programs | . . . Line control memory settings of the communication controller | . . . Use of external maintenance commands | ||||
| JJ | JJ00 RESULTS OF MONITORING AND TESTING |
JJ01 | JJ02 | JJ03 | JJ04 | JJ05 | JJ06 | |||||
| . Fault information | . . Fault position information | . Alarms | . Testing or measurement data | . . On-line data | . . Line control memory data of the communication controller | |||||||
| KK | KK00 STORAGE AND INDICATION OF THE RESULTS OF MONITORING AND TESTING |
KK01 | KK02 | KK03 | KK04 | KK05 | KK06 | KK07 | ||||
| . Data tracing or storage | . . Random-access memory (RAM) | . . Magnetic tape | . Visible indication | . . Display of transmission control characters | . . Binary or hexadecimal display | . Storage or indication of the monitoring or testing time | ||||||
| LL | LL00 MEASURES FOR ABNORMALITIES AND FAULTS |
LL01 | LL02 | LL03 | LL04 | LL06 | LL07 | |||||
| . Prohibition or stopping of operation | . . Prohibition of processor interrupts | . . Prohibition or stopping of transmission | . . Prohibition or stopping of reception | . Retry | . . Reset to the initial state | |||||||
| LL11 | LL12 | LL13 | LL14 | LL15 | LL16 | LL17 | LL18 | |||||
| . Changing of the configuration of the device | . . Replacing defective devices with other devices | . . . Substitute devices with a data-storage means | . . . Switching to spare equipment | . . . . 1:1 ratio of switching | . . . . N:1 ratio of switching (i.e., wherein N is a variable number) | . Changing of circuit configurations | . . Switching to spare circuits | |||||
| MM | MM00 TRANSMISSION OF MONITORING AND MAINTENANCE SIGNALS |
MM01 | MM02 | MM03 | MM04 | MM05 | MM06 | MM07 | MM08 | MM09 | ||
| . Types of monitoring and maintenance signals | . . Control command for execution of monitoring or testing | . . Monitoring or testing results | . . Command signals for abnormalities or faults | . Directing the transmission | . . Direction from monitoring or testing positions to other devices | . . . Direction from monitoring or testing positions to maintenance stations | . Communication methods | . . Time sharing or addition to other signals |