US Patent Class 370
MULTIPLEX COMMUNICATIONS



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Current as of: June, 1999
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  DF  CLASS NOTES
200  DF  PHANTOM
201  DF  CROSSTALK SUPPRESSION
202  DF  AMPLITUDE COMPRESSION OR EXPANSION
203  DF  GENERALIZED ORTHOGONAL OR SPECIAL MATHEMATICAL TECHNIQUES
204  DF  .~ Plural diverse modulation techniques
205  DF  .~.~ Pulse width and pulse position modulation
206  DF  .~ Quadrature carriers
207  DF  .~.~ Having a signaling constellation
208  DF  .~ Particular set of orthogonal functions
209  DF  .~.~ Walsh functions
210  DF  .~ Fourier transform
211  DF  .~ Level multiplex
212  DF  PULSE WIDTH (PULSE DURATION) MODULATION
213  DF  PULSE POSITION MODULATION
214  DF  SIMULTANEOUS TELEGRAPHY AND TELEPHONY
215  DF  PHASE MODULATION
216  DF  FAULT RECOVERY
217  DF  .~ Bypass an inoperative switch or inoperative element of a switching system
218  DF  .~.~ Packet switching system or element
219  DF  .~.~.~ Standby switch
220  DF  .~.~ Standby switch
221  DF  .~ Bypass an inoperative station
222  DF  .~.~ In a ring or loop network
223  DF  .~.~.~ Using a secondary ring or loop
224  DF  .~.~.~.~ Loopback of signals on the secondary ring or loop
225  DF  .~ Bypass an inoperative channel
226  DF  .~.~ In a repeater system
227  DF  .~.~.~ Using a spare channel
228  DF  .~.~ Spare channel
229  DF  DATA FLOW CONGESTION PREVENTION OR CONTROL
230  DF  .~ Control of data admission to the network
231  DF  .~.~ End-to-end flow control
232  DF  .~.~ Based on data flow rate measurement
233  DF  .~.~.~ Measurement of the peak data flow rate
234  DF  .~.~.~ Measurement of the average data flow rate
235  DF  .~ Flow control of data transmission through a network
236  DF  .~.~ Including signaling between network elements
237  DF  .~.~ Congestion based rerouting
238  DF  .~.~ Least cost or minimum delay routing
239  DF  .~ Using antijabber circuit
240  DF  .~.~ In a star coupler
241  DF  DIAGNOSTIC TESTING (OTHER THAN SYNCHRONIZATION)
242  DF  .~ Fault detection
243  DF  .~.~ Of a repeater system
244  DF  .~.~ Of a switching system
245  DF  .~.~ Of a local area network
246  DF  .~ Of a repeater
247  DF  .~.~ Having a dedicated test line or channel
248  DF  .~ Path check
249  DF  .~ Loopback
250  DF  .~ Of a switching system
251  DF  .~.~ Having dedicated test line or channel
252  DF  .~ Determination of communication parameters
253  DF  .~.~ Measurement of flow rate of messages having an address header
254  DF  NETWORK CONFIGURATION DETERMINATION
255  DF  .~ Using a particular learning algorithm or technique
256  DF  .~.~ Spanning tree
257  DF  .~ In a bus system
258  DF  .~.~ In a ring system
259  DF  SPECIAL SERVICES
260  DF  .~ Conferencing
261  DF  .~.~ Technique for setting up a conference call
262  DF  .~.~.~ Operator setup of the conference
263  DF  .~.~ Conferee signals combined or distributed via time channels
264  DF  .~.~.~ Using plural diverse channel communications with a dedicated signaling channel (i.e., ISDN)
265  DF  .~.~.~ Particular technique for combining diverse information types
266  DF  .~.~.~ Using summation of conferee signals
267  DF  .~.~.~.~ Digital summation
268  DF  .~.~.~.~.~ Including cancellation of certain signals
269  DF  .~.~.~.~ Including cancellation of certain signals
270  DF  .~ Distribution of signal to multiple agent stations
271  DF  .~ Special feature of multiplex telephone terminal
272  DF  SEXTUPLEX
273  DF  QUADRUPLEX
274  DF  .~ Repeater
275  DF  .~ Duplex diplex
276  DF  DUPLEX
277  DF  .~ Communication over free space
278  DF  .~.~ Transmit/receive interaction control
279  DF  .~.~ Duplex repeaters
280  DF  .~.~ Time division
281  DF  .~.~ Frequency division
282  DF  .~ Transmit/receive interaction control
283  DF  .~.~ Artificial line
284  DF  .~.~ Differential
285  DF  .~.~ Bridge
286  DF  .~.~ Echo suppression or cancellation
287  DF  .~.~.~ Disabling or inhibiting
288  DF  .~.~.~ Using an attenuator
289  DF  .~.~.~ Having residual echo cancellation or suppression
290  DF  .~.~.~ Using a particular adaptive filter
291  DF  .~.~.~.~ Using a transversal filter
292  DF  .~.~.~ Using a training sequence
293  DF  .~ Duplex repeaters or extenders
294  DF  .~ Time division
295  DF  .~ Frequency division
296  DF  .~ Convertible to half duplex
297  DF  DIPLEX
298  DF  LOW SPEED ASYNCHRONOUS DATA SYSTEM (E.G., TELETYPEWRITER SERVICE)
299  DF  .~ Data switching exchange
300  DF  .~ Data assembly or formatting
301  DF  .~ Transmitting time of transition and logic state
302  DF  .~ Channels separated in frequency
303  DF  .~ Rotary distributor
304  DF  .~.~ Synchronizer
305  DF  .~.~.~ Start-Stop
306  DF  .~.~.~.~ Nonmechanical
307  DF  TRASMULTIPLEXERS
308  DF  RESONANT TRANSFER TECHNIQUES
309  DF  RESONANT TRANSFER SUBSTITUTES
310  DF  COMMUNICATION OVER FREE SPACE
311  DF  .~ Signaling for performing battery saving
312  DF  .~ Message addressed to multiple destinations
313  DF  .~ Portable address responsive receiver
314  DF  .~.~ Using time division multiplexing
315  DF  .~ Repeater
316  DF  .~.~ Airborne or space satellite repeater
317  DF  .~.~.~ Including noise compensation
318  DF  .~.~.~.~ Including power control
319  DF  .~.~.~ Multiple access (e.g., FDMA)
320  DF  .~.~.~.~ Code division (CDMA)
321  DF  .~.~.~.~ Time division (TDMA)
322  DF  .~.~.~.~.~ Channel reservation scheme
323  DF  .~.~.~.~.~ Including onboard switching
324  DF  .~.~.~.~.~ Synchronization
325  DF  .~.~.~.~ Including onboard switching
326  DF  .~.~.~ Combining or distributing information via time channels
327  DF  .~.~ In a trunking system
328  DF  .~ Having a plurality of contiguous regions served by respective fixed stations
329  DF  .~.~ Channel assignment
330  DF  .~.~.~ Having both time and frequency assignment
331  DF  .~.~.~ Hand-off control
332  DF  .~.~.~.~ Based upon a particular signal quality measurement
333  DF  .~.~.~.~.~ Signal quality determined by bit error rate
334  DF  .~.~.~.~.~ Using multiple antennas at a station
335  DF  .~.~.~ Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)
336  DF  .~.~.~ Combining or distributing information via time channels
337  DF  .~.~.~.~ Multiple access (e.g., TDMA)
338  DF  .~.~ Contiguous regions interconnected by a local area network
339  DF  .~ Plural usage of common antenna
340  DF  .~ Using trunking
341  DF  .~.~ Channel assignment
342  DF  .~ Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)
343  DF  .~ Combining or distributing information via frequency channels
344  DF  .~.~ Multiple access (e.g., FDMA)
345  DF  .~ Combining or distributing information via time channels
346  DF  .~.~ Polling
347  DF  .~.~ Multiple access (e.g., TDMA)
348  DF  .~.~.~ Channel reservation scheme
349  DF  .~.~ Using messages having an address field as header
350  DF  .~.~ Synchronization
351  DF  PATHFINDING OR ROUTING
352  DF  .~ Combined circuit switching and packet switching
353  DF  .~.~ Switching network having common elements to handle both circuit switched traffic and packet switched traffic
354  DF  .~.~ Switching network having separate elements to handle circuit switched traffic and packet switched traffic
355  DF  .~.~ Routing packets through a circuit switching network
356  DF  .~.~ Routing circuit switched traffic through a packet switching network
357  DF  .~ Through a circuit switch
358  DF  .~.~ Switching input signals having different aggregate bit rates
359  DF  .~.~ Input or output circuit, per se (i.e., line interface)
360  DF  .~.~ Switching control
361  DF  .~.~.~ Folded network
362  DF  .~.~.~ Bus switch
363  DF  .~.~.~.~ Having details of control storage arrangement
364  DF  .~.~.~.~ Having plural buses
365  DF  .~.~.~.~.~ Separate transmit and receive buses
366  DF  .~.~.~ Including serial-parallel or parallel-serial conversion for input or output
367  DF  .~.~.~.~ For distribution to a multiplanar switching network
368  DF  .~.~.~.~ Having details of control storage arrangement
369  DF  .~.~.~ Having time and space switches
370  DF  .~.~.~.~ Having space switch as intermediate stage (e.g., T-S-T, T-S-S, or S-S-T)
371  DF  .~.~.~.~.~ Having details of control storage arrangement
372  DF  .~.~.~.~ Having time switch as intermediate stage (e.g., S-T-S or T-T-S)
373  DF  .~.~.~.~ Having supervisory signaling
374  DF  .~.~.~.~ Having details of control storage arrangement
375  DF  .~.~.~ Time switch, per se (e.g., T or T-T)
376  DF  .~.~.~.~ Time slot interchange, per se
377  DF  .~.~.~.~ Having supervisory signaling
378  DF  .~.~.~.~ Having details of control storage arrangement
379  DF  .~.~.~.~.~ Data memory addressing
380  DF  .~.~.~ Space switch, per se (e.g., S or S-S)
381  DF  .~.~.~ Having details of control storage arrangement
382  DF  .~.~.~.~ Data memory addressing
383  DF  .~.~.~.~ Control storage addressing
384  DF  .~.~.~ Having a supervisory signaling feature
385  DF  .~.~.~.~ Having a separate signaling network
386  DF  .~.~ Particular switching network arrangement
387  DF  .~.~.~ Multiplanar switch
388  DF  .~.~.~ Multistage switch
389  DF  .~ Switching a message which includes an address header
390  DF  .~.~ Replicate messages for multiple destination distribution
391  DF  .~.~ Switching input signals having different aggregate bit rates
392  DF  .~.~ Processing of address header for routing, per se
393  DF  .~.~.~ Address concatenation
394  DF  .~.~ Sequencing or resequencing of packets to insure proper output sequence order
395  DF  .~.~ Message transmitted using regularly occurring fixed length time intervals (e.g., ATM)
396  DF  .~.~.~ Distributed switching
397  DF  .~.~.~.~ Employing logical addressing for routing (e.g., VP or VC)
398  DF  .~.~.~ Centralized switching
399  DF  .~.~.~.~ Employing logical addressing for routing (e.g., VP or VC)
400  DF  .~.~ Having a plurality of nodes performing distributed switching
401  DF  .~.~.~ Bridge or gateway between networks
402  DF  .~.~.~.~ Bridge between bus systems
403  DF  .~.~.~.~.~ At least one bus is a ring network
404  DF  .~.~.~.~.~.~ Ring or loop forms backbone for interconnecting other networks
405  DF  .~.~.~.~.~.~.~ The other networks are ring or loop networks
406  DF  .~.~.~ Plurality of rings or loops to form a mesh network
407  DF  .~.~.~ Interconnected star couplers
408  DF  .~.~.~ Nodes interconnected in hierarchy to form a tree
409  DF  .~.~.~ Employing logical addressing for routing (e.g., VP or VC)
410  DF  .~.~.~ Having a signaling feature
411  DF  .~.~ Including sorting and merging networks
412  DF  .~.~ Queuing arrangement
413  DF  .~.~.~ Having both input and output queuing
414  DF  .~.~.~.~ Contention resolution for output
415  DF  .~.~.~ Having input queuing only
416  DF  .~.~.~.~ Contention resolution for output
417  DF  .~.~.~ Having output queuing only
418  DF  .~.~.~.~ Contention resolution for output
419  DF  .~.~ Input or output circuit, per se (i.e., line interface)
420  DF  .~.~.~ For connecting plural subscribers to a network (i.e., network termination)
421  DF  .~.~.~.~ Subscribers connected to input or output circuit by a common bus
422  DF  .~.~ Centralized switching
423  DF  .~.~.~ Including a bus for interconnecting inputs and outputs
424  DF  .~.~.~.~ Including a ring or loop for interconnecting inputs and outputs
425  DF  .~.~.~ Star configuration
426  DF  .~.~.~ Having a signaling feature
427  DF  .~.~ Space switching
428  DF  .~ Store and forward
429  DF  .~.~ Particular storing and queuing arrangement
430  DF  .~ FDM switching
431  DF  CHANNEL ASSIGNMENT TECHNIQUES
432  DF  .~ Messages addressed to multiple destinations
433  DF  .~ Only active channels transmitted
434  DF  .~.~ Concentrator
435  DF  .~.~.~ TASI (Time Assignment Speech Interpolation)
436  DF  .~ Combined time and frequency assignment
437  DF  .~ Adaptive selection of channel assignment technique
438  DF  .~ Using a separate control line or bus for access control
439  DF  .~.~ Control line is used to request or reserve access
440  DF  .~.~.~ Dual bus dynamic queuing (i.e., DQDB)
441  DF  .~ Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)
442  DF  .~ Combining or distributing information via time channels using multiple access technique (e.g., TDMA)
443  DF  .~.~ Using channel reservation
444  DF  .~.~.~ With priority resolution
445  DF  .~ Carrier sense multiple access (CSMA)
446  DF  .~.~ Using a star coupler
447  DF  .~.~ Arbitration for access between contending stations
448  DF  .~.~.~ Using weighted back-off timing
449  DF  .~ Polling
450  DF  .~.~ Passing a signal identifying the idle or busy state of a channel (e.g., token passing)
451  DF  .~.~.~ On bus
452  DF  .~.~.~.~ On ring or loop
453  DF  .~.~.~.~.~ Initialization or reinitialization of network
454  DF  .~.~.~.~.~ Having multiple idle or busy signals simultaneously on the network
455  DF  .~.~.~.~.~ Including priority resolution
456  DF  .~.~.~.~.~ Idle or busy signal erasure or frame erasure
457  DF  .~.~.~ Initialization or reinitialization of network
458  DF  .~ Using time slots
459  DF  .~.~ Having indication of idle or busy state of time slot
460  DF  .~.~.~ On ring or loop network
461  DF  .~.~ Arbitration for access between contending stations
462  DF  .~ Arbitration for access to a channel
463  DF  .~ Details of circuit or interface for connecting user to the network
464  DF  COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS
465  DF  .~ Adaptive
466  DF  .~.~ Converting between protocols
467  DF  .~.~.~ Conversion between signaling protocols
468  DF  .~.~ Assignment of variable bandwidth or time period for transmission or reception
469  DF  .~.~ Processing multiple layer protocols
470  DF  .~.~ Frame length
471  DF  .~.~.~ Message having an address header
472  DF  .~.~ Byte length
473  DF  .~.~ Transmission of a single message having multiple packets
474  DF  .~ Assembly or disassembly of messages having address headers
475  DF  .~ Address transmitted
476  DF  .~ Byte assembly and formatting
477  DF  .~ Transmission bandwidth conservation
478  DF  .~ Combined time division and frequency division
479  DF  .~ Combining or distributing information via code word channels
480  DF  .~ Combining or distributing information via frequency channels
481  DF  .~.~ Multiple frequency translations
482  DF  .~.~ Particular carrier generation
483  DF  .~.~ Using angle modulation
484  DF  .~.~ Digital analysis or synthesis of a group
485  DF  .~.~ Subscriber carrier
486  DF  .~.~.~ Program distribution
487  DF  .~.~.~.~ Combined communication of diverse information types
488  DF  .~.~.~ Connecting filters
489  DF  .~.~ Bus (distributed stations)
490  DF  .~.~.~ Combined communication of diverse information types
491  DF  .~.~ Pilot
492  DF  .~.~ Repeater
493  DF  .~.~ Combined voice and data transmission
494  DF  .~.~.~ Data over voice
495  DF  .~.~.~ Data under voice
496  DF  .~.~ Signaling
497  DF  .~.~ Using particular filtering technique
498  DF  .~ Combining or distributing information via time channels
499  DF  .~.~ Polarity multiplex
500  DF  .~.~ Pilot
501  DF  .~.~ Repeater
502  DF  .~.~.~ Bus extenders
503  DF  .~.~ Synchronizing
504  DF  .~.~.~ Reference indication consists of a gap
505  DF  .~.~.~ Pulse stuffing or deletion
506  DF  .~.~.~.~ Frame or bit stream justification
507  DF  .~.~.~ Mutual (reciprocal) synchronization
508  DF  .~.~.~.~ Transmission time into time slots adjusted based upon propagation delay time
509  DF  .~.~.~ Using synchronization information contained in a frame
510  DF  .~.~.~.~ Synchronization information is distributed over multiple frames
511  DF  .~.~.~.~.~ Using redundant synchronization words
512  DF  .~.~.~.~ Synchronization information is distributed within a frame
513  DF  .~.~.~.~.~ Plural synchronization words
514  DF  .~.~.~.~ Unique synchronization word or unique bit sequence
515  DF  .~.~.~.~.~ Pseudo-random
516  DF  .~.~.~ Adjusting for phase or jitter
517  DF  .~.~.~.~ Including delay device
518  DF  .~.~.~.~.~ Provide plural phases of a clocking signal
519  DF  .~.~.~.~.~ Delay based upon propagation delay time
520  DF  .~.~.~ Unique synchronization pulse
521  DF  .~.~ Time compression or expansion
522  DF  .~.~ Signaling (ancillary to main information)
523  DF  .~.~.~ Using bit robbing
524  DF  .~.~.~ Using a dedicated signaling channel (i.e., D-channel)
525  DF  .~.~.~ Digital tone signal generation
526  DF  .~.~.~ Digital tone detection
527  DF  .~.~.~ Superimposed or modulated on principal information
528  DF  .~.~.~ Inserted in gaps in main information
529  DF  .~.~ Information superimposed on other information
530  DF  .~.~ Staircase wave
531  DF  .~.~ Magnetic core for switching or storage
532  DF  .~.~ Multiplexer or distributor and technique for handling low level input signal
533  DF  .~.~ Multiplexer or distributor using pulse amplitude modulation
534  DF  .~.~ Multiplexer or distributor using electron beam switching device
535  DF  .~.~ Multiplexing combined with demultiplexing
536  DF  .~.~ Demultiplexing single signal into plural parallel channels (e.g., parallel transmission for increasing transmission speed)
537  DF  .~.~ Multiplexing plural input channels to a common output channel
538  DF  .~.~.~ Plural input channels of different rates to a single common rate output channel
539  DF  .~.~.~.~ Multiple levels of multiplexing to form a multiplex hierarchy
540  DF  .~.~.~ Plural input channels of same rate to a single common rate output channel
541  DF  .~.~.~.~ Multiple levels of multiplexing to form a multiplex hierarchy
542  DF  .~.~ Demultiplexing single input channel to plural output channels
543  DF  .~.~.~ Different rate output channels
544  DF  .~.~.~ Same rate output channels
545  DF  .~.~ Conversion of rate from a single input to a single output
546  DF  MISCELLANEOUS
*********************************
CROSS-REFERENCE ART COLLECTIONS
*********************************
901  DF  WIDE AREA NETWORK
902  DF  .~ Packet switching
903  DF  .~.~ OSI Compliant Network
904  DF  .~.~.~ Integrated Services Digital Network (ISDN)
905  DF  .~.~.~ Asynchronous Transfer Mode (ATM)
906  DF  .~.~.~ Fiber Data Distribution Interface (FDDI)
907  DF  .~.~.~ Synchronous Optical network (SONET)
908  DF  LOCAL AREA NETWORK
909  DF  .~ Token ring
910  DF  .~ Carrier sense multiple access (e.g., Ethernet, 10Base-T)
911  DF  .~ Bridge (e.g., brouter, bus extender, etc.)
912  DF  PACKET COMMUNICATIONS
913  DF  .~ Wireless or radio
914  DF  RATE CONVERTER
915  DF  TIME DIVISION CELLULAR RADIO SYSTEMS
916  DF  MULTIPLEXER/DEMULTIPLEXER
******************************
FOREIGN ART COLLECTIONS
******************************
FOR 100  DF  SIMULTANEOUS TELEGRAPHY AND TELEPHONY (370/125)
FOR 101  DF  MULTIPLEX SWITCHING (370/53)
FOR 102  DF  .~ Pathfinding (370/54)
FOR 103  DF  .~ Drop channel (370/55)
FOR 104  DF  .~ Concentrators (370/56)
FOR 105  DF  .~ FDM switching (frequency division multiplexing) (370/57)
FOR 106  DF  .~ TDM switching (time division multiplexing) (370/58.1)
FOR 107  DF  .~.~ Control processing (370/58.2)
FOR 108  DF  .~.~.~ Distributed (370/58.3)
FOR 109  DF  .~.~ T-S (Time-Space) or S-T (370/59)
FOR 110  DF  .~.~ Packet or addressed data (370/60)
FOR 111  DF  .~.~.~ Combined with circuit-switching (370/60.1)
FOR 112  DF  .~.~ Store and forward (370/61)
FOR 113  DF  .~.~ Special services with switching (e.g., conference) (370/62)
FOR 114  DF  .~.~ TST (Time-Space-Time) (370/63)
FOR 115  DF  .~.~ STS (Space-Time-Space) (370/64)
FOR 116  DF  .~.~ Folded network (370/65)
FOR 117  DF  .~.~ Space stage, per se (370/65.5)
FOR 118  DF  .~.~ Time only (370/66)
FOR 119  DF  .~.~.~ Bus switch (370/67)
FOR 120  DF  .~.~ Time slot interchangers, per se (370/68)
FOR 121  DF  .~.~ With signalling feature (370/68.1)
FOR 122  DF  FREQUENCY DIVISION (370/69.1)
FOR 123  DF  .~ Multiple frequency translations (370/120)
FOR 124  DF  .~ Carrier generation (370/121)
FOR 125  DF  .~ Angle modulation (370/122)
FOR 126  DF  .~ Filtering techniques (370/123)
FOR 127  DF  .~ Digital analysis or synthesis of group (370/70)
FOR 128  DF  .~ Subscriber carrier (370/71)
FOR 129  DF  .~.~ Connecting filters (370/72)
FOR 130  DF  .~.~ Program distribution (370/73)
FOR 131  DF  .~ Bus (distributed stations) (370/124)
FOR 132  DF  .~ Pilot (370/74)
FOR 133  DF  .~ Repeaters (370/75)
FOR 134  DF  .~ Signalling (370/76)
FOR 135  DF  TIME DIVISION (370/77)
FOR 136  DF  .~ Polarity multiplex (370/78)
FOR 137  DF  .~ Adaptive systems (370/79)
FOR 138  DF  .~.~ Only active channels transmitted (370/80)
FOR 139  DF  .~.~.~ TASI (Time assigned speech interpolation) (370/81)
FOR 140  DF  .~.~ Frame length (370/82)
FOR 141  DF  .~.~ Byte length (370/83)
FOR 142  DF  .~.~ Rate (370/84)
FOR 143  DF  .~ Bus transmission (370/85.1)
FOR 144  DF  .~.~ Contention (370/85.2)
FOR 145  DF  .~.~.~ Carrier sense (370/85.3)
FOR 146  DF  .~.~.~ Token passing (370/85.4)
FOR 147  DF  .~.~.~.~ Loop or ring (370/85.5)
FOR 148  DF  .~.~ Priority (370/85.6)
FOR 149  DF  .~.~ Variable channel assignment (370/85.7)
FOR 150  DF  .~.~.~ Polling (370/85.8)
FOR 151  DF  .~.~ Plural bus (370/85.9)
FOR 152  DF  .~.~.~ With separate control bus (370/85.11)
FOR 153  DF  .~.~.~ Loop or ring (370/85.12)
FOR 154  DF  .~.~.~ Bridge between bus systems (370/85.13)
FOR 155  DF  .~.~.~.~ Interconnection between ring or loop (370/85.14)
FOR 156  DF  .~.~ Loop or ring (370/85.15)
FOR 157  DF  .~ Asynchronous and nonsynchronous (370/91)
FOR 158  DF  .~.~ Address transmitted (370/92)
FOR 159  DF  .~.~.~ Multiple access, discrete address (370/93)
FOR 160  DF  .~.~.~ Packet (370/94.1)
FOR 161  DF  .~.~.~.~ Combined with synchronous information (370/94.2)
FOR 162  DF  .~.~.~.~ Star, tree, or mesh networks (370/94.3)
FOR 163  DF  .~ Variable channel assignment (370/95.1)
FOR 164  DF  .~.~ Polling (370/95.2)
FOR 165  DF  .~.~ Time division multiple access (370/95.3)
FOR 166  DF  .~ TDM pulse repeater (370/97)
FOR 167  DF  .~ Pilot (370/98)
FOR 168  DF  .~ Byte assembly and formatting (370/99)
FOR 169  DF  .~ Synchronizing (370/100.1)
FOR 170  DF  .~.~ Reference indication consists of a gap (370/101)
FOR 171  DF  .~.~ Pulse stuffing or deletion (370/102)
FOR 172  DF  .~.~ Mutual (reciprocal) synchronization (370/103)
FOR 173  DF  .~.~ Moving satelite (370/104.1)
FOR 174  DF  .~.~ Distributed (370/105)
FOR 175  DF  .~.~ Frame (370/105.1)
FOR 176  DF  .~.~ Channel (370/105.2)
FOR 177  DF  .~.~ Bit phase or jitter (370/105.3)
FOR 178  DF  .~.~ Unique synchronization word (370/105.4)
FOR 179  DF  .~.~ Unique sychronization pulse (370/105.5)
FOR 180  DF  .~.~ Plural sychronizing words (370/106)
FOR 181  DF  .~.~ Pseudo-random (370/107)
FOR 182  DF  .~.~ Including delay device (370/108)
FOR 183  DF  .~ Time compression or expansion (370/109)
FOR 184  DF  .~ Signalling (ancilliary to main information) (370/110.1)
FOR 185  DF  .~.~ Digital tone signal generation (370/110.2)
FOR 186  DF  .~.~ Digital tone detection (370/110.3)
FOR 187  DF  .~.~ Superimposed or modulated on principal information (370/110.4)
FOR 188  DF  .~.~ Inserted in gaps in main information (370/111)
FOR 189  DF  .~ Multiplexers/distributors (hierarchy and level) (370/112)
FOR 190  DF  .~.~ Apparatus and techniques for handling low level input signals (370/113)
FOR 191  DF  .~.~ Pulse amplitude modulation (370/114)
FOR 192  DF  .~.~ Electron beam switching device (370/115)
FOR 193  DF  .~ Staircase wave (370/116)
FOR 194  DF  .~ Magnetic core for switching or storage (370/117)
FOR 195  DF  TRANSMISSION BANDWIDTH CONSERVATION (370/118)
FOR 196  DF  MISCELLANEOUS (370/119)