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| Class 370 | MULTIPLEX COMMUNICATIONS |
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![[List of Pre Grant Publications for class 370 subclass 200]](../as.gif) | ![[List of Patents for class 370 subclass 200]](../ps.gif) | 200 | PHANTOM |
| | 201 | CROSSTALK SUPPRESSION |
| | 202 | AMPLITUDE COMPRESSION OR EXPANSION |
| | 203 | GENERALIZED ORTHOGONAL OR SPECIAL MATHEMATICAL TECHNIQUES |
| | 204 |  Plural diverse modulation techniques |
| | 206 | Quadrature carriers |
| | 208 | Particular set of orthogonal functions |
| | 210 | Fourier transform |
| | 211 | Level multiplex |
| | 212 | PULSE WIDTH (PULSE DURATION) MODULATION |
| | 213 | PULSE POSITION MODULATION |
| | 214 | SIMULTANEOUS TELEGRAPHY AND TELEPHONY |
| | 215 | PHASE MODULATION |
| | 216 | FAULT RECOVERY |
| | 217 | Bypass an inoperative switch or inoperative element of a switching system |
| | 221 | Bypass an inoperative station |
| | 225 | Bypass an inoperative channel |
| | 229 | DATA FLOW CONGESTION PREVENTION OR CONTROL |
| | 230 | Control of data admission to the network |
| | 235 | Flow control of data transmission through a network |
| | 235.1 |  Using leaky bucket technique |
| | 236 | Including signaling between network elements |
| | 236.1 |  Using RM (Resource Management) cells |
| | 236.2 | Using OAM (Operation, Administration and Maintenance) cells |
| | 237 | Congestion based rerouting |
| | 238 | Least cost or minimum delay routing |
| | 239 | Using antijabber circuit |
| | 241 | DIAGNOSTIC TESTING (OTHER THAN SYNCHRONIZATION) |
| | 241.1 | Using OAM (Operation, Administration and Maintenance) cells |
| | 242 | Fault detection |
| | 246 | Of a repeater |
| | 248 | Path check |
| | 249 | Loopback |
| | 250 | Of a switching system |
| | 252 | Determination of communication parameters |
| | 254 | NETWORK CONFIGURATION DETERMINATION |
| | 259 | SPECIAL SERVICES |
| | 260 | Conferencing |
| | 261 | Technique for setting up a conference call |
| | 263 | Conferee signals combined or distributed via time channels |
| | 270 | Distribution of signal to multiple agent stations |
| | 271 | Special feature of multiplex telephone terminal |
| | 272 | SEXTUPLEX |
| | 273 | QUADRUPLEX |
| | 276 | DUPLEX |
| | 277 | Communication over free space |
| | 278 | Transmit/receive interaction control |
| | 279 | Duplex repeaters |
| | 280 | Time division |
| | 281 | Frequency division |
| | 282 | Transmit/receive interaction control |
| | 293 | Duplex repeaters or extenders |
| | 294 | Time division |
| | 295 | Frequency division |
| | 296 | Convertible to half duplex |
| | 297 | DIPLEX |
| | 298 | LOW SPEED ASYNCHRONOUS DATA SYSTEM (E.G., TELETYPEWRITER SERVICE) |
| | 299 | Data switching exchange |
| | 300 | Data assembly or formatting |
| | 301 | Transmitting time of transition and logic state |
| | 302 | Channels separated in frequency |
| | 303 | Rotary distributor |
| | 307 | TRASMULTIPLEXERS |
| | 308 | RESONANT TRANSFER TECHNIQUES |
| | 309 | RESONANT TRANSFER SUBSTITUTES |
| | 310 | COMMUNICATION OVER FREE SPACE |
| | 310.1 | Using ATM as a wireles protocol |
| | 311 | Signaling for performing battery saving |
| | 312 | Message addressed to multiple destinations |
| | 313 | Portable address responsive receiver |
| | 315 | Repeater |
| | 316 | Airborne or space satellite repeater |
| | 317 | Including noise compensation |
| | 319 | Multiple access (e.g., FDMA) |
| | 326 | Combining or distributing information via time channels |
| | 327 | In a trunking system |
| | 328 | Having a plurality of contiguous regions served by respective fixed stations |
| | 329 | Channel assignment |
| | 330 | Having both time and frequency assignment |
| | 331 | Hand-off control |
| | 335 | Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA) |
| | 336 | Combining or distributing information via time channels |
| | 338 | Contiguous regions interconnected by a local area network |
| | 339 | Plural usage of common antenna |
| | 340 | Using trunking |
| | 342 | Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA) |
| | 343 | Combining or distributing information via frequency channels |
| | 345 | Combining or distributing information via time channels |
| | 351 | PATHFINDING OR ROUTING |
| | 352 | Combined circuit switching and packet switching |
| | 353 | Switching network having common elements to handle both circuit switched traffic and packet switched traffic |
| | 354 | Switching network having separate elements to handle circuit switched traffic and packet switched traffic |
| | 355 | Routing packets through a circuit switching network |
| | 356 | Routing circuit switched traffic through a packet switching network |
| | 357 | Through a circuit switch |
| | 358 | Switching input signals having different aggregate bit rates |
| | 359 | Input or output circuit, per se (i.e., line interface) |
| | 360 | Switching control |
| | 361 | Folded network |
| | 362 | Bus switch |
| | 366 | Including serial-parallel or parallel-serial conversion for input or output |
| | 367 |  For distribution to a multiplanar switching network |
| | 368 | Having details of control storage arrangement |
| | 369 | Having time and space switches |
| | 370 | Having space switch as intermediate stage (e.g., T-S-T, T-S-S, or S-S-T) |
| | 372 | Having time switch as intermediate stage (e.g., S-T-S or T-T-S) |
| | 373 | Having supervisory signaling |
| | 374 | Having details of control storage arrangement |
| | 375 | Time switch, per se (e.g., T or T-T) |
| | 376 | Time slot interchange, per se |
| | 377 | Having supervisory signaling |
| | 378 | Having details of control storage arrangement |
| | 380 | Space switch, per se (e.g., S or S-S) |
| | 381 | Having details of control storage arrangement |
| | 384 | Having a supervisory signaling feature |
| | 386 | Particular switching network arrangement |
| | 389 | Switching a message which includes an address header |
| | 390 | Replicate messages for multiple destination distribution |
| | 391 | Switching input signals having different aggregate bit rates |
| | 392 | Processing of address header for routing, per se |
| | 394 | Sequencing or resequencing of packets to insure proper output sequence order |
| | 395.1 | Message transmitted using fixed length packets (e.g., ATM cells) |
| | 396 | Distributed switching |
| | 398 | Centralized switching |
| | 395.2 | Connection set-up/disconnect (e.g., Connection Admission Control) |
| | 395.3 | Connection identifier assignment |
| | 395.4 | Assigning period of time for information to be transmitted (e.g., scheduling) |
| | 395.5 | Multiprotocol network |
| | 395.51 | Utilizing a plurality of ATM networks (e.g., MPOA, SONET, or SDH) |
| | 395.52 | Internet Protocol (including TCP/IP or UDP/IP) over fixed length packet network (e.g., IP over ATM) |
| | 395.53 | Emulated LAN (LANE/ELAN/VLAN, e.g., Ethernet or token ring legacy LAN over a single ATM network/LAN) |
| | 395.54 | Address resolution (e.g., ARP, or NHRP) |
| | 395.6 | Adapting detail (e.g., converting to/from ATM, or detail of ATM Adaption Layers (AALs)) |
| | 395.61 | Adapting constant bit rate (CBR) data (e.g., voice, or narrow band ISDN over ATM, or using AAL1) |
| | 395.63 | Adapting frame relay/X.25 data (e.g., using AAL 3/4) |
| | 395.64 | Adapting connection-oriented variable bit rate (VBR) data (e.g., MPEG/HDTV packet video/audio over ATM or using AAL2) |
| | 395.65 | Adapting connectionless variable bit rate (VBR) data (e.g., adapting 802.X, or using AAL5) |
| | 395.7 | Having detail of switch memory reading/writing |
| | 400 | Having a plurality of nodes performing distributed switching |
| | 401 | Bridge or gateway between networks |
| | 406 | Plurality of rings or loops to form a mesh network |
| | 407 | Interconnected star couplers |
| | 408 | Nodes interconnected in hierarchy to form a tree |
| | 409 | Employing logical addressing for routing (e.g., VP or VC) |
| | 410 | Having a signaling feature |
| | 411 | Including sorting and merging networks |
| | 412 | Queuing arrangement |
| | 413 | Having both input and output queuing |
| | 415 | Having input queuing only |
| | 417 | Having output queuing only |
| | 419 | Input or output circuit, per se (i.e., line interface) |
| | 422 | Centralized switching |
| | 423 | Including a bus for interconnecting inputs and outputs |
| | 425 | Star configuration |
| | 426 | Having a signaling feature |
| | 427 | Space switching |
| | 428 | Store and forward |
| | 430 | FDM switching |
| | 431 | CHANNEL ASSIGNMENT TECHNIQUES |
| | 432 | Messages addressed to multiple destinations |
| | 433 | Only active channels transmitted |
| | 436 | Combined time and frequency assignment |
| | 437 | Adaptive selection of channel assignment technique |
| | 438 | Using a separate control line or bus for access control |
| | 441 | Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA) |
| | 442 | Combining or distributing information via time channels using multiple access technique (e.g., TDMA) |
| | 445 | Carrier sense multiple access (CSMA) |
| | 449 | Polling |
| | 458 | Using time slots |
| | 459 | Having indication of idle or busy state of time slot |
| | 461 | Arbitration for access between contending stations |
| | 462 | Arbitration for access to a channel |
| | 463 | Details of circuit or interface for connecting user to the network |
| | 464 | COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS |
| | 465 | Adaptive |
| | 466 | Converting between protocols |
| | 468 | Assignment of variable bandwidth or time period for transmission or reception |
| | 469 | Processing multiple layer protocols |
| | 470 | Frame length |
| | 472 | Byte length |
| | 473 | Transmission of a single message having multiple packets |
| | 474 | Assembly or disassembly of messages having address headers |
| | 475 | Address transmitted |
| | 476 | Byte assembly and formatting |
| | 477 | Transmission bandwidth conservation |
| | 478 | Combined time division and frequency division |
| | 479 | Combining or distributing information via code word channels |
| | 480 | Combining or distributing information via frequency channels |
| | 481 | Multiple frequency translations |
| | 482 | Particular carrier generation |
| | 483 | Using angle modulation |
| | 484 | Digital analysis or synthesis of a group |
| | 485 | Subscriber carrier |
| | 489 | Bus (distributed stations) |
| | 491 | Pilot |
| | 492 | Repeater |
| | 493 | Combined voice and data transmission |
| | 496 | Signaling |
| | 497 | Using particular filtering technique |
| | 498 | Combining or distributing information via time channels |
| | 499 | Polarity multiplex |
| | 500 | Pilot |
| | 501 | Repeater |
| | 503 | Synchronizing |
| | 504 | Reference indication consists of a gap |
| | 505 | Pulse stuffing or deletion |
| | 507 | Mutual (reciprocal) synchronization |
| | 509 | Using synchronization information contained in a frame |
| | 510 | Synchronization information is distributed over multiple frames |
| | 512 | Synchronization information is distributed within a frame |
| | 514 | Unique synchronization word or unique bit sequence |
| | 516 | Adjusting for phase or jitter |
| | 520 | Unique synchronization pulse |
| | 521 | Time compression or expansion |
| | 522 | Signaling (ancillary to main information) |
| | 523 | Using bit robbing |
| | 524 | Using a dedicated signaling channel (i.e., D-channel) |
| | 525 | Digital tone signal generation |
| | 526 | Digital tone detection |
| | 527 | Superimposed or modulated on principal information |
| | 528 | Inserted in gaps in main information |
| | 529 | Information superimposed on other information |
| | 530 | Staircase wave |
| | 531 | Magnetic core for switching or storage |
| | 532 | Multiplexer or distributor and technique for handling low level input signal |
| | 533 | Multiplexer or distributor using pulse amplitude modulation |
| | 534 | Multiplexer or distributor using electron beam switching device |
| | 535 | Multiplexing combined with demultiplexing |
| | 536 | Demultiplexing single signal into plural parallel channels (e.g., parallel transmission for increasing transmission speed) |
| | 537 | Multiplexing plural input channels to a common output channel |
| | 538 | Plural input channels of different rates to a single common rate output channel |
| | 540 | Plural input channels of same rate to a single common rate output channel |
| | 542 | Demultiplexing single input channel to plural output channels |
| | 545 | Conversion of rate from a single input to a single output |
| | 546 | MISCELLANEOUS |
| CROSS-REFERENCE ART COLLECTIONS | ||
| | 901 | WIDE AREA NETWORK |
| | 908 | LOCAL AREA NETWORK |
| | 909 | Token ring |
| | 910 | Carrier sense multiple access (e.g., Ethernet, 10Base-T) |
| | 911 | Bridge (e.g., brouter, bus extender, etc.) |
| | 912 | PACKET COMMUNICATIONS |
| | 914 | RATE CONVERTER |
| | 915 | TIME DIVISION CELLULAR RADIO SYSTEMS |
| | 916 | MULTIPLEXER/DEMULTIPLEXER |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
| FOR100 | SIMULTANEOUS TELEGRAPHY AND TELEPHONY (370/125) |
| FOR101 | MULTIPLEX SWITCHING (370/53) |
| FOR102 | Pathfinding (370/54) |
| FOR103 | Drop channel (370/55) |
| FOR104 | Concentrators (370/56) |
| FOR105 | FDM switching (frequency division multiplexing) (370/57) |
| FOR106 | TDM switching (time division multiplexing) (370/58.1) |
| FOR107 | Control processing (370/58.2) |
| FOR109 | T-S (Time-Space) or S-T (370/59) |
| FOR110 | Packet or addressed data (370/60) |
| FOR112 | Store and forward (370/61) |
| FOR113 | Special services with switching (e.g., conference) (370/62) |
| FOR114 | TST (Time-Space-Time) (370/63) |
| FOR115 | STS (Space-Time-Space) (370/64) |
| FOR116 | Folded network (370/65) |
| FOR117 | Space stage, per se (370/65.5) |
| FOR118 | Time only (370/66) |
| FOR120 | Time slot interchangers, per se (370/68) |
| FOR121 | With signalling feature (370/68.1) |
| FOR122 | FREQUENCY DIVISION (370/69.1) |
| FOR123 | Multiple frequency translations (370/120) |
| FOR124 | Carrier generation (370/121) |
| FOR125 | Angle modulation (370/122) |
| FOR126 | Filtering techniques (370/123) |
| FOR127 | Digital analysis or synthesis of group (370/70) |
| FOR128 | Subscriber carrier (370/71) |
| FOR131 | Bus (distributed stations) (370/124) |
| FOR132 | Pilot (370/74) |
| FOR133 | Repeaters (370/75) |
| FOR134 | Signalling (370/76) |
| FOR135 | TIME DIVISION (370/77) |
| FOR136 | Polarity multiplex (370/78) |
| FOR137 | Adaptive systems (370/79) |
| FOR138 | Only active channels transmitted (370/80) |
| FOR140 | Frame length (370/82) |
| FOR141 | Byte length (370/83) |
| FOR142 | Rate (370/84) |
| FOR143 | Bus transmission (370/85.1) |
| FOR144 | Contention (370/85.2) |
| FOR148 | Priority (370/85.6) |
| FOR149 | Variable channel assignment (370/85.7) |
| FOR151 | Plural bus (370/85.9) |
| FOR152 | With separate control bus (370/85.11) |
| FOR153 | Loop or ring (370/85.12) |
| FOR154 | Bridge between bus systems (370/85.13) |
| FOR156 | Loop or ring (370/85.15) |
| FOR157 | Asynchronous and nonsynchronous (370/91) |
| FOR163 | Variable channel assignment (370/95.1) |
| FOR166 | TDM pulse repeater (370/97) |
| FOR167 | Pilot (370/98) |
| FOR168 | Byte assembly and formatting (370/99) |
| FOR169 | Synchronizing (370/100.1) |
| FOR170 | Reference indication consists of a gap (370/101) |
| FOR171 | Pulse stuffing or deletion (370/102) |
| FOR172 | Mutual (reciprocal) synchronization (370/103) |
| FOR173 | Moving satelite (370/104.1) |
| FOR174 | Distributed (370/105) |
| FOR175 | Frame (370/105.1) |
| FOR176 | Channel (370/105.2) |
| FOR177 | Bit phase or jitter (370/105.3) |
| FOR178 | Unique synchronization word (370/105.4) |
| FOR179 | Unique sychronization pulse (370/105.5) |
| FOR180 | Plural sychronizing words (370/106) |
| FOR181 | Pseudo-random (370/107) |
| FOR182 | Including delay device (370/108) |
| FOR183 | Time compression or expansion (370/109) |
| FOR184 | Signalling (ancilliary to main information) (370/110.1) |
| FOR185 | Digital tone signal generation (370/110.2) |
| FOR186 | Digital tone detection (370/110.3) |
| FOR187 | Superimposed or modulated on principal information (370/110.4) |
| FOR188 | Inserted in gaps in main information (370/111) |
| FOR189 | Multiplexers/distributors (hierarchy and level) (370/112) |
| FOR190 | Apparatus and techniques for handling low level input signals (370/113) |
| FOR191 | Pulse amplitude modulation (370/114) |
| FOR192 | Electron beam switching device (370/115) |
| FOR193 | Staircase wave (370/116) |
| FOR194 | Magnetic core for switching or storage (370/117) |
| FOR195 | TRANSMISSION BANDWIDTH CONSERVATION (370/118) |
| FOR196 | MISCELLANEOUS (370/119) |
| PATHFINDING OR ROUTING |
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