US Patent Class 379
TELEPHONIC COMMUNICATIONS



Electronic
File
Wrappers

Electronic
Patent
Documents

Paper
Patent
Documents

Current as of: June, 1999
Click for Main Headings
Click DF for Definitions
Click for All Classes

Internet Version by PATENTEC © 1999       Terms of Use



Products
and
Services

  DF  CLASS NOTES
1  DF  DIAGNOSTIC TESTING, MALFUNCTION INDICATION, OR ELECTRICAL CONDITION MEASUREMENT
2  DF  .~ Including fault responsive disconnection of tested component
3  DF  .~ Of hybrid or echo suppressor or canceller
4  DF  .~ Of repeater
5  DF  .~ By loopback
6  DF  .~ By analysis of injected tone signal
7  DF  .~ For detection of eavesdropping device
8  DF  .~ With blocking of normal usage
9  DF  .~ Of centralized switching system
10  DF  .~.~ By automatic testing sequence (e.g., programmable, scanning)
11  DF  .~.~.~ Routiner
12  DF  .~.~ With dedicated testing line or trunk
13  DF  .~.~ Of call timing or charging equiment
14  DF  .~.~ Of plural exchange network
15  DF  .~.~ Of automatic switching equipment
16  DF  .~.~.~ Of switching path
17  DF  .~.~.~ Of switching selector
18  DF  .~.~.~ By use of call address signal
19  DF  .~.~.~ Rapid manual connecting structure for test equipment
20  DF  .~.~ Of switchboard element condition (e.g., lamp)
21  DF  .~ Using portable test set (e.g., handset type)
22  DF  .~ Of trunk or long line
23  DF  .~.~ Of line signalling
24  DF  .~.~ Electrical parameter measurement (e.g., attenuation)
25  DF  .~.~ Conductor identification or location
26  DF  .~.~ Fault detection or location (e.g., continuity, leakage)
27  DF  .~ Of subscriber loop or terminal
28  DF  .~.~ Of data transmission instrument
29  DF  .~.~ Terminal arrangement to enable remote testing (e.g., testing interface)
30  DF  .~.~ Loop impedance (e.g., resistance, capacitance)
31  DF  .~.~ Of line signalling generator (e.g., dial, tone code generator)
32  DF  .~ Indication of nonstandard condition of telephone equipment
33  DF  .~.~ Alarm or emergency (e.g., cut line)
34  DF  SERVICE MONITORING OR OBSERVATION
35  DF  .~ Listening-in or eavesdropping type
36  DF  FREE CALLING FROM PAYSTATION
37  DF  EMERGENCY OR ALARM COMMUNICATIONS (E.G., WATCHMAN'S CIRCUIT)
38  DF  .~ Personal monitoring (e.g., for the ill or infirm)
39  DF  .~ Responsive to sensed nonsystem condition
40  DF  .~.~ Automatic dialing
41  DF  .~.~ Transmission of recorded audio message
42  DF  .~.~ Plural conditions
43  DF  .~.~ Fire
44  DF  .~.~ Intrusion
45  DF  .~ Central office responsive to emergency call or alarm (e.g., "911", operator position display)
46  DF  .~ Called line or station condition responsive (e.g., recall if busy)
47  DF  .~ Plural alarms over single line
48  DF  .~ Announcement or alarm received at terminal station (e.g., "butt-in", alarm)
49  DF  .~ Central station with plural substations
50  DF  .~ By pulse or digital signal
51  DF  .~ With automatic dialing or transmission of recorded audio message
52  DF  INCLUDING AID FOR HANDICAPPED USER (E.G., VISUAL, TACTILE, HEARING AID COUPLING)
55.1  DF  HAVING NEAR FIELD LINK (E.G., CAPACITIVE, INDUCTIVE)
56.1  DF  HAVING LIGHT WAVE OR ULTRASONIC LINK FOR SPEECH OR PAGING SIGNAL
56.2  DF  .~ Including fiber optic link within telephone network
56.3  DF  .~ Including infra-red link with landline telephone network
67.1  DF  AUDIO MESSAGE STORAGE, RETRIEVAL, OR SYNTHESIS
68  DF  .~ Dynamic audio signal recording or reproduction
69  DF  .~.~ Call originating
70  DF  .~.~ Call intercept or answering
71  DF  .~.~.~ Consecutive use of recorded phrases or words to form message
72  DF  .~.~.~ Sequential or repeated announcement during single call initiated cycle
73  DF  .~.~.~ Plural record carrier channels
74  DF  .~.~.~ Remote control over telephone line
75  DF  .~.~.~.~ Remote dictation
76  DF  .~.~.~.~ Announcement selection or replacement
77  DF  .~.~.~.~ Control by generated tone
78  DF  .~.~.~ Acoustic coupling
79  DF  .~.~.~ With specified call initiated cycle control circuitry
80  DF  .~.~.~.~ Voice signal presence responsive
81  DF  .~.~.~.~ Call termination responsive (e.g., hang-up)
82  DF  .~.~.~.~ Having specified call initiation (e.g., ringing) responsive circuitry
83  DF  .~.~.~.~ Structural detail of storage medium drive
84  DF  .~.~.~ At switching facility (e.g., central office, switchboard)
85  DF  .~.~ Recording of telephone signal during normal operation
86  DF  .~.~.~ Inductive pickup
87  DF  .~.~ Reproduced signal distributed over telephone line
88.01  DF  .~ Voice activation or recognition
88.02  DF  .~.~ Voice verification (e.g., voice authorization, voiceprint, etc.)
88.03  DF  .~.~ Voice dialing
88.04  DF  .~.~ Voice controlled message management
88.05  DF  .~ Multilingual system or operation
88.06  DF  .~.~ Language selection
88.07  DF  .~ Digital signal processing (DSP)
88.08  DF  .~ Message signal analysis
88.09  DF  .~.~ Statistical analysis (e.g., time, date, length of message, etc.)
88.1  DF  .~.~ Including data compression
88.11  DF  .~ Display of message related information
88.12  DF  .~ Indication or notification of message
88.13  DF  .~ Multimedia system (e.g., voice output combined with fax, video, text, etc.)
88.14  DF  .~.~ Presentation format conversion
88.15  DF  .~.~ Pager activation
88.16  DF  .~ Voice message synthesis
88.17  DF  .~ Interaction with an external nontelephone network (e.g., Internet)
88.18  DF  .~ Interacting voice message systems
88.19  DF  .~ Call source identification
88.2  DF  .~.~ Automatic Number Identification (ANI)
88.21  DF  .~.~ Caller identification received at substation
88.22  DF  .~ Message management
88.23  DF  .~.~ Controlled by subscriber or caller
88.24  DF  .~.~.~ By generated tone
88.25  DF  .~.~.~ Message storage in centralized location (e.g., central office, PBX, etc.)
88.26  DF  .~.~.~.~ Recording voice message from non subscriber caller
88.27  DF  .~.~ Separate storage for voice and control information
88.28  DF  .~.~ Solid state memory storage
90.01  DF  TELEPHONE LINE OR SYSTEM COMBINED WITH DIVERSE ELECTRICAL SYSTEM OR SIGNALLING (E.G., COMPOSITE)
91.01  DF  .~ Credit authorization
91.02  DF  .~.~ At switching station
92.01  DF  .~ Polling
92.02  DF  .~.~ Televoting
92.03  DF  .~.~ Having central station equipment
92.04  DF  .~.~ Having subscriber station equipment
93.01  DF  .~ Having transmission of a digital message signal over a telephone line
93.02  DF  .~.~ Access restricting
93.03  DF  .~.~.~ Personal identification
93.04  DF  .~.~.~ Two or more calls
93.05  DF  .~.~ Terminal interface circuitry
93.06  DF  .~.~.~ Digital
93.07  DF  .~.~.~ To plural lines or networks
93.08  DF  .~.~ Transmission scheme (e.g., compression/decompression, transmission rate)
93.09  DF  .~.~ Switching between different terminal types (e.g., voice/data switch)
93.11  DF  .~.~.~ Among at least three terminal types
93.12  DF  .~.~ Sales, ordering, or banking system
93.13  DF  .~.~ Amusement (e.g., game, lottery)
93.14  DF  .~.~ Having switching station
93.15  DF  .~.~.~ Having format conversion
93.17  DF  .~.~ Having station display
93.18  DF  .~.~.~ Having tone code recognition for generating alphanumeric characters
93.19  DF  .~.~.~ Having pressure or position sensitive surface (e.g., touch-screen, light pen)
93.21  DF  .~.~.~ Having conferencing
93.22  DF  .~.~.~ At pay station
93.23  DF  .~.~.~ Having user information display (e.g., telephone number, name, address, etc.)
93.24  DF  .~.~.~ Having electronic mail
93.25  DF  .~.~.~ Having remote database (e.g., videotex system)
93.26  DF  .~.~ By voice frequency signal (e.g., tone code)
93.27  DF  .~.~.~ Alphanumeric
93.28  DF  .~.~.~ Modulated audio tone
93.29  DF  .~.~.~.~ Reconfigurable
93.31  DF  .~.~.~.~ Protocol
93.32  DF  .~.~.~.~.~ Initial setup
93.33  DF  .~.~.~.~.~ Having adjustable speed
93.34  DF  .~.~.~.~.~ Having recognition and selection
93.35  DF  .~.~.~.~ Having call-waiting
93.36  DF  .~.~.~.~ Line powered
93.37  DF  .~.~.~ Having acoustic link
100.01  DF  .~ To produce visual-graphic copy (e.g., facsimile)
100.02  DF  .~.~ Having detachable device (e.g., detachable storage medium, scanner)
100.03  DF  .~.~ Usage system
100.04  DF  .~.~ Communication charge calculation
100.05  DF  .~.~ Monitoring
100.06  DF  .~.~ Communication status notification
100.07  DF  .~.~ Using mark sheet
100.08  DF  .~.~ Electronic mailbox
100.09  DF  .~.~ Relay system
100.11  DF  .~.~ From a library
100.12  DF  .~.~ Connection to plural networks or lines
100.13  DF  .~.~ Format conversion
100.14  DF  .~.~ Call signal generation (e.g., auto-dial)
100.15  DF  .~.~ Having switching to other communication modes
100.16  DF  .~.~.~ Voice mode
100.17  DF  .~.~ Transmission scheme
101.01  DF  .~ Audio program distribution
102.01  DF  .~ Remote control
102.02  DF  .~.~ Communication device
102.03  DF  .~.~.~ Entertainmemt appliance (e.g., TV, VCR, radio, etc.)
102.04  DF  .~.~.~ Power source
102.05  DF  .~.~ Of heating, ventilation, air conditioner (e.g., HVAC)
102.06  DF  .~.~ Of physical entrance or exit lock
102.07  DF  .~.~ Having indication
106.01  DF  .~ Remote indication over telephone line (e.g., telemetry)
106.02  DF  .~.~ Patient monitoring
106.03  DF  .~.~ Meter reading
106.04  DF  .~.~.~ Having power supply circuitry
106.05  DF  .~.~.~ Having ringing suppression
106.06  DF  .~.~.~ Having time window
106.07  DF  .~.~.~ Having interrogation signal
106.08  DF  .~.~.~ Having line status detection
106.09  DF  .~.~ Ringing suppression
106.11  DF  .~.~ Interrogation signal
108.01  DF  .~ Telegraphy
108.02  DF  .~.~ Over telephone line
110.01  DF  COMPOSITE SUBSTATION OR TERMINAL (E.G., HAVING CALCULATOR, RADIO)
111  DF  WITH USAGE MEASUREMENT (E.G., CALL OR TRAFFIC REGISTER)
112  DF  .~ Computer or processor control
113  DF  .~.~ Call traffic recording
114  DF  .~ Call charge metering or monitoring
115  DF  .~.~ Interexchange operations
116  DF  .~.~.~ Hardcopy record generating
117  DF  .~.~ Of station on polystation or party line
118  DF  .~.~.~ Identification of station
119  DF  .~.~ Hardcopy record generating (e.g., ticket printing)
120  DF  .~.~.~ With line identification or class of service determination
121  DF  .~.~ At central office
122  DF  .~.~.~ With display
123  DF  .~.~.~ Paystation (e.g., escrow control)
124  DF  .~.~.~ Pulse counting or accumulating (e.g., "message metering")
125  DF  .~.~.~.~ Local or zone
126  DF  .~.~.~.~ Automatic message accounting
127  DF  .~.~.~.~.~ Having line identification (e.g., automatic number identification - "ANI")
128  DF  .~.~.~.~ Time of day controlled
129  DF  .~.~.~ Manually set (e.g., key and lock)
130  DF  .~.~ At subscriber station
131  DF  .~.~.~ Time controlled
132  DF  .~.~.~.~ Paystation (e.g., escrow control)
133  DF  .~ Call traffic recording or monitoring
134  DF  .~.~ At central station
135  DF  .~.~.~ With hardcopy record generation (e.g., ticket printing)
136  DF  .~.~.~ With display
137  DF  .~.~.~ Trunk usage (e.g., peg count)
138  DF  .~.~.~.~ All trunks busy metering
139  DF  .~.~.~ Counting the number of completed connections
140  DF  .~.~ At subscriber
141  DF  .~.~.~ Mechanical register
142  DF  WITH CALLING NUMBER DISPLAY OR RECORDING AT CALLED SUBSTATION
143  DF  WITH CHECK OPERATED CONTROL (E.G., PAYSTATION)
144  DF  .~ Other than coin
145  DF  .~ Fraud or interference prevention
146  DF  .~ Coin signalling or control
147  DF  .~.~ Coin box audit or totalizer
148  DF  .~.~ Denomination
149  DF  .~.~ Post-pay coin collection
150  DF  .~.~ Coin disposition (i.e., return or collection)
151  DF  .~.~.~ Upon connection to called station
152  DF  .~.~.~ Magnet, electromagnet, or relay controlled from central office
153  DF  .~.~.~ Paystation (e.g., controlled by refund key)
154  DF  .~ At central office
155  DF  .~ At terminal station (e.g., coin paystation)
156  DF  MULTI-LINE OR KEY SUBSTATION SYSTEM WITH SELECTIVE SWITCHING AND CENTRAL SWITCHING OFFICE CONNECTION
157  DF  .~ With special service
158  DF  .~.~ Conferencing
159  DF  .~ With intercom system
160  DF  .~.~ With connection of intercom station to subscriber line
161  DF  .~ With exclusion or priority feature (e.g., lockout or privacy)
162  DF  .~ Detail of hold circuitry
163  DF  .~.~ Electronic
164  DF  .~ Line status indication or call alerting
165  DF  .~ Switching or supervision feature (e.g., common control, digital)
166  DF  .~ Detail of line circuit or line card
167  DF  PRIVATE (E.G., HOUSE OR INTERCOM) OR SINGLE LINE SYSTEM
168  DF  .~ Lockout
169  DF  .~.~ Central power source
170  DF  .~ With paging
171  DF  .~ Having plural stations with selective calling (e.g., master)
172  DF  .~.~ With call addressing
173  DF  .~ With call addressing
174  DF  .~ Including body or apparel supported terminal (e.g., headgear)
175  DF  .~.~ For underwater use (e.g., in diver's suit)
176  DF  .~ With central power source
177  DF  POLYSTATION LINE SYSTEM (I.E., PARTY LINE)
178  DF  .~ Revertive call
179  DF  .~ Call alerting (e.g., ringing)
180  DF  .~.~ Full selective or tuned (e.g., harmonic)
181  DF  .~.~ Semi-selective (e.g., line side, polarized)
182  DF  .~ Automatic or unattended
183  DF  .~.~ Station identification
184  DF  .~.~ Lockout
185  DF  .~ Portable or mobile
186  DF  .~ Central power source
187  DF  .~ Connected to central office
188  DF  CALL OR TERMINAL ACCESS ALARM OR CONTROL
189  DF  .~ Fraud or improper use mitigating or indication (e.g., "blue box", "black box")
190  DF  .~ Time out
191  DF  .~.~ At switching center
192  DF  .~.~.~ Of call duration (e.g., conversation timer)
193  DF  .~.~.~ Of specific equipment
194  DF  .~ Lockout or double use signalling
195  DF  .~.~ In automatic system
196  DF  .~ At switching center
197  DF  .~.~ Central office
198  DF  .~.~ PBX
199  DF  .~ At substation
200  DF  .~.~ Restrictive dialing circuit
201  DF  SPECIAL SERVICES
202  DF  .~ Conferencing
203  DF  .~.~ Operator control
204  DF  .~.~ Subscriber control
205  DF  .~.~.~ Conference initiation by single calling station
206  DF  .~.~ At substation
207  DF  .~ At plural exchanges
208  DF  .~ Priority override (e.g., butt-in)
209  DF  .~ Repetitive call attempts (e.g., camp-on-busy, retry)
210  DF  .~ Call diversion (e.g., call capture)
211  DF  .~.~ Call forwarding
212  DF  .~.~ Call transfer
213  DF  .~.~ Intercept (e.g., dead or changed number)
214  DF  .~.~ Secretarial or answering service
215  DF  .~ Call waiting
216  DF  .~ Abbreviated dialing or direct call (e.g., hot line)
217  DF  .~ Audible paging
218  DF  .~ Performed by operator (e.g., butt-in, busy verification)
219  DF  PLURAL EXCHANGE NETWORK OR INTERCONNECTION
220  DF  .~ With interexchange network routing
221  DF  .~.~ Alternate routing
222  DF  .~ Toll center
223  DF  .~.~ With operator assistance
224  DF  .~ Tandem switching center
225  DF  .~ Multi-PBX interconnection
226  DF  .~ Having a manual exchange
227  DF  .~.~ With an automatic exchange
228  DF  .~.~.~ Having signalling to operator
229  DF  .~ Interexchange signalling
230  DF  .~.~ Signalling path distinct from trunk (e.g., CCIS)
231  DF  .~.~ Central office-to-PBX signalling
232  DF  .~.~.~ PBX trunk groups
233  DF  .~.~.~ Direct inward dialing
234  DF  .~.~ PBX to central office signalling (e.g., direct outward dialing)
235  DF  .~.~ Voice frequency signalling over trunk
236  DF  .~.~ D.C. signalling over trunk
237  DF  .~.~.~ Pulse or digital signalling
238  DF  .~.~.~.~ Having signalling repeater
239  DF  .~.~.~.~ Using register-sender
240  DF  .~.~ Interexchange trunk circuit
241  DF  .~.~.~ Glare or simultaneous seizure mitigation
242  DF  CENTRALIZED SWITCHING SYSTEM
243  DF  .~ Class of service determination or transmission
244  DF  .~.~ In common control system
245  DF  .~ Identification
246  DF  .~.~ Of line or trunk
247  DF  .~.~.~ With display
248  DF  .~.~.~ Using matrix
249  DF  .~.~.~ For nuisance call mitigation
250  DF  .~ Four-wire switching
251  DF  .~ With generating of call associated substation signal
252  DF  .~.~ For alerting signal at called station (e.g., ringing)
253  DF  .~.~.~ Electronic
254  DF  .~.~.~ Associated with connector
255  DF  .~.~.~ With interrupter
256  DF  .~.~ Having automatic or through ringing
257  DF  .~.~ For calling station (e.g., status or progress tones)
258  DF  .~ Switching controlled in response to called station addressing signal
259  DF  .~.~ Including deflected electron beam switching device or mechanical or optical switching control (e.g., fluidic)
260  DF  .~.~ With operator position or completion of call (e.g., dial "O", semiautomatic)
261  DF  .~.~.~ Operator controlled register-sender
262  DF  .~.~.~ Call extension by operator
263  DF  .~.~.~.~ With call indicator or announcer
264  DF  .~.~.~.~ A to B operator
265  DF  .~.~.~ Call distribution to operator
266  DF  .~.~.~.~ Call queuing
267  DF  .~.~.~ Operator's console
268  DF  .~.~ Having shared or common switching control
269  DF  .~.~.~ Distributed control
270  DF  .~.~.~ In-stage or interstage scanning (e.g., link scanning)
271  DF  .~.~.~ Having multistage switching
272  DF  .~.~.~.~ Path selection or routing
273  DF  .~.~.~.~.~ Alternate routing
274  DF  .~.~.~.~.~.~ With busy or idle test
275  DF  .~.~.~.~.~ Including marking circuit
276  DF  .~.~.~.~.~.~ End-to-end marking (e.g., self-seeking)
277  DF  .~.~.~.~.~ With busy or idle test
278  DF  .~.~.~.~ Interstage junctor or "trunk"
279  DF  .~.~.~ Control reliability (e.g., redundancy)
280  DF  .~.~.~ Including registering or storing device for call address signal
281  DF  .~.~.~.~ Conversion between dial pulse and voice frequency signal
282  DF  .~.~.~.~ Voice frequency receiver
283  DF  .~.~.~.~.~ Dual tone multifrequency (DTMF) receiver
284  DF  .~.~.~.~ With processor
285  DF  .~.~.~.~ With magnetic memory
286  DF  .~.~.~.~ Signal processing (e.g., dial pulse analysis)
287  DF  .~.~.~.~ Electronic
288  DF  .~.~.~.~ Register-sender
289  DF  .~.~.~ Translator
290  DF  .~.~.~ With time division of control or supervisory signals
291  DF  .~.~.~ With detail of crosspoint switching structure (e.g., crossbar)
292  DF  .~.~.~.~ Electronic crosspoint (e.g., solid-state)
293  DF  .~.~ Having line finder
294  DF  .~.~.~ Including electronic element (e.g., tube or semiconductor)
295  DF  .~.~.~ Plural
296  DF  .~.~ With repeater
297  DF  .~.~ Having specified busy-idle test
298  DF  .~.~ Direct control
299  DF  .~.~.~ Step-by-step system
300  DF  .~.~.~.~ Having plural wiper sets
301  DF  .~.~.~.~ Having potential control
302  DF  .~.~.~.~ Having rotary switch
303  DF  .~.~.~.~ Coordinate system (e.g., X-Y)
304  DF  .~.~.~ All relay type
305  DF  .~.~.~ Having motor-driven switch
306  DF  .~.~ With crosspoint switch detail
307  DF  .~.~ With power supply
308  DF  .~ Switching apparatus for connecting calling line to operator's position
309  DF  .~.~ Call distribution or queuing
310  DF  .~ Divided central (e.g., communication between switchboards)
311  DF  .~.~ Having signalling path feature
312  DF  .~ Having multiple answering jacks for multiplied line
313  DF  .~ Multiple section switchboard
314  DF  .~.~ Auxiliary (e.g., overflow)
315  DF  .~ With line-signal control
316  DF  .~.~ Spring-jack cut-off
317  DF  .~.~ Relay cut-off
318  DF  .~.~ Central power source
319  DF  .~ Single switchboard (e.g., cord circuit)
320  DF  .~.~ Switchboard circuit
321  DF  .~.~.~ Connection to operator's terminal
322  DF  .~ Power supply
323  DF  .~.~ Power to switching equipment
324  DF  .~.~ Central power source (e.g., common battery, line current feed)
325  DF  .~ Structure of equipment
326  DF  .~.~ Wire or cable distribution
327  DF  .~.~.~ Main or intermediate distribution frame
328  DF  .~.~ Equipment mounting or support
329  DF  .~.~.~ Allowing movement of equipment (e.g., movable, modular)
330  DF  .~.~ Housing
331  DF  .~ Having protective circuit
332  DF  .~ Plug and socket
333  DF  CONCENTRATOR OR TRUNK SELECTOR
334  DF  .~ Concentrator-distributor pair (e.g., line concentrator)
335  DF  .~ Using crossbar or crosspoint switching
336  DF  .~ With magnet, electromagnet, or relay
337  DF  .~ With busy-idle test (e.g., idle trunk finder)
338  DF  REPEATER (E.G., VOICE FREQUENCY)
339  DF  .~ With signal conversion (e.g., dial to DTMF, analog to PCM)
340  DF  .~ Having line length compensation or equalization
341  DF  .~ Pulse or tone repeater (e.g., electromechanical relay)
342  DF  .~.~ Electronic (e.g., logic circuitry)
343  DF  .~ Controlled by a pilot or reference signal
344  DF  .~ Component processes bidirectional signals
345  DF  .~.~ Including two-to-four wire conversion or hybrid circuit
346  DF  .~ With frequency discriminator or negative impedance element
347  DF  .~ With gain or attenuation control
348  DF  .~ Transmission of power to distant repeater
349  DF  .~ Having voice frequency transformer
350  DF  SUPERVISORY OR CONTROL LINE SIGNALLING
351  DF  .~ Signalling integrity protection (e.g., voice signal immunity)
352  DF  .~ Substation originated
353  DF  .~.~ Conversion of signal form
354  DF  .~.~ With called number display
355  DF  .~.~ Repertory or abbreviated call signal generation
356  DF  .~.~.~ With dynamic memory
357  DF  .~.~.~ Insertable control element or circuitry (e.g., card)
358  DF  .~.~.~ By motor driven dial rotating device
359  DF  .~.~.~ Pulse signal generating (e.g., dialing)
360  DF  .~.~ Voice frequency band signalling (e.g., reed devices)
361  DF  .~.~.~ Electronic (e.g., tone generator)
362  DF  .~.~ Pulse signal generator (e.g., rotary dial)
363  DF  .~.~.~ Control of motor driven dial rotating device
364  DF  .~.~.~ With nonrotary actuator (e.g., key or slide type)
365  DF  .~.~.~ Specified switching contact (e.g., contact spring)
366  DF  .~.~.~ With detail of dial return mechanism (e.g., driving spring, speed governor)
367  DF  .~.~.~ Finger wheel or mechanical adjunct (e.g., finger stop)
368  DF  .~.~ Plural-switch number input device (e.g., keypad)
369  DF  .~.~ Detail of mounting of switch pad or dial
370  DF  .~.~.~ In handset
371  DF  .~.~ Magneto signalling
372  DF  .~ Signal reception at substation
373  DF  .~.~ Incoming call alerting (e.g., ringing)
374  DF  .~.~.~ With music or audible message generation
375  DF  .~.~.~ With electronic call sounder (e.g., tone "ringer")
376  DF  .~.~.~ With visual indication of incoming call
377  DF  .~ Using line or loop condition detection (e.g., line circuit)
378  DF  .~.~ With current controlling electromagnetic core device (e.g., Hall-effect device)
379  DF  .~.~ With optical link between line and switching system
380  DF  .~.~ By bridge circuit
381  DF  .~.~ Busy test or make busy
382  DF  .~.~ For ring trip or polarity reversal detection
383  DF  .~.~ Of plural lines
384  DF  .~.~.~ By scanning
385  DF  .~.~ Relayless
386  DF  .~ Signal receiver (e.g., tone decoder)
387  DF  SUBSTATION OR TERMINAL CIRCUITRY
388  DF  .~ For loudspeaking terminal
389  DF  .~.~ With circuitry for voice control of transmission direction
390  DF  .~.~ With amplification or attenuation level control
391  DF  .~ Sidetone control or hybrid circuit (e.g., induction coil)
392  DF  .~.~ Suppression (e.g., antisidetone)
393  DF  .~ Hold circuit
394  DF  .~ Impedance matching or line equalizing
395  DF  .~ Amplifying
396  DF  .~ Visual signalling (e.g., lamp)
397  DF  .~ Wire distribution
398  DF  LINE EQUALIZATION OR IMPEDANCE MATCHING
399  DF  SUBSCRIBER LINE OR TRANSMISSION LINE INTERFACE
400  DF  .~ For line length compensation
401  DF  .~.~ Voltage boosting circuit
402  DF  .~ Hybrid circuit
403  DF  .~.~ With adjustable balance circuit
404  DF  .~.~.~ Automatic adjustment
405  DF  .~.~ Electronic noninductive
406  DF  .~ Echo suppression, antisinging, or reverse path blocking
407  DF  .~.~ Disable or inhibit
408  DF  .~.~ Control by pilot frequency signal
409  DF  .~.~ Having variolosser or attenuator
410  DF  .~.~ Echo cancellation (e.g., phase opposition)
411  DF  .~.~.~ Having transversal filter
412  DF  .~ Protective circuit
413  DF  .~ Power supply (e.g., battery feed)
414  DF  TRANSMISSION LINE CONDITIONING
415  DF  .~ Reactance neutralizing
416  DF  .~ Interference suppression
417  DF  .~.~ Anticrosstalk
418  DF  CALL SIGNAL GENERATING (E.G., RINGING OR TONE GENERATOR)
419  DF  TERMINAL
420  DF  .~ Having loudspeaking conversation capability (e.g., hands-free type or speakerphone)
421  DF  .~ Having muting
422  DF  .~ Switch or switch actuator structure
423  DF  .~.~ Line selection
424  DF  .~.~ Receiver or handset position responsive (e.g., hookswitch)
425  DF  .~.~.~ With mechanism for latching hookswitch or plunger against motion
426  DF  .~.~.~ Movable holder for receiver or handset
427  DF  .~.~.~ Having plunger and lever linkage
428  DF  .~ Housing or housing component
429  DF  .~.~ Having distinct circuitry support structure (e.g., circuit board)
430  DF  .~.~ Body supported (e.g., headgear)
431  DF  .~.~ Separate housings for earphone and microphone (e.g., candlestick type)
432  DF  .~.~ Loudspeaking set
433  DF  .~.~ Handset structure
434  DF  .~.~ Specified terminal configuration (e.g., novelty type)
435  DF  .~.~ Wall set or convertible type
436  DF  .~.~ Desk set
437  DF  .~.~ Protective structure
438  DF  .~.~.~ Of cord or connector
439  DF  .~.~.~ Antiseptic
440  DF  .~.~ Casing or enclosure, per se
441  DF  TERMINAL ACCESSORY OR AUXILIARY EQUIPMENT
442  DF  .~ With circuit connection to terminal
443  DF  .~ Including coupler (e.g., inductive)
444  DF  .~.~ Acoustic
445  DF  .~ Locking device
446  DF  .~ Telephone receiver support
447  DF  .~ Attachable to terminal housing
448  DF  .~.~ Hookswitch operator
449  DF  .~.~ Handset holder (e.g., shoulder rest)
450  DF  .~.~ Clips onto terminal structure
451  DF  .~ Protective structure
452  DF  .~.~ Antiseptic, disinfecting, or disposable
453  DF  .~ Hood or enclosure (e.g., booth)
454  DF  .~ Support or stand
455  DF  .~.~ Handset holder
456  DF  .~ Dialing tool
457  DF  MISCELLANEOUS
**********************************
CROSS REFERENCE ART COLLECTIONS
*********************************
900  DF  INTERNET (e.g., Internet phone, webphone, Internet-based telephony)
901  DF  VIRTUAL NETWORKS OR VIRTUAL PRIVATE NETWORKS
902  DF  AUTO-SWITCH FOR AN INCOMING VOICE DATA, OR FAX TELEPHONE CALL (E.G., COMP/ FAX/TEL)
903  DF  PASSWORD
904  DF  AUTO-CALLING
905  DF  FAX MAIL
906  DF  TOUCHTONE MESSAGE TRANSMISSION
907  DF  SPEECH RECOGNITION VIA TELEPHONE SYSTEM OR COMPONENT
908  DF  .~ MULTIMEDIA
909  DF  ALTERNATIVES
910  DF  BAR CODE OR OPTICAL CHARACTER READER WITH TELEPHONE
911  DF  DISTINCTIVE RINGING
912  DF  GEOGRAPHICALLY ADAPTIVE
913  DF  PERSON LOCATOR OR PERSON-SPECIFIC
914  DF  PROGRAMMABLE TELEPHONE COMPONENT
915  DF  .~ "SOFT" KEY
916  DF  TOUCH SCREEN ASSOCIATED WITH TELEPHONE SET
917  DF  VOICE MENUS
*********************************
FOREIGN ART COLLECTIONS
*********************************
FOR 100  DF  HAVING NEAR FIELD LINK (E.G., CAPACITIVE, INDUCTIVE) (379/55)
FOR 101  DF  HAVING ELECTROMAGNETIC LINK FOR SPEECH OR PAGING SIGNAL (E.G., LIGHT WAVE LINK) (379/56)
FOR 102  DF  .~ Control of selectively responsive paging arrangement over telephone line (379/57)
FOR 103  DF  .~ Radio telephone system or instrument (379/58)
FOR 104  DF  .~.~ Zoned or cellular system (379/59)
FOR 105  DF  .~.~.~ Having zoned/cellular system switching (e.g., handoff) (379/60)
FOR 106  DF  .~.~ Including cordless extension set (i.e., having single subscriber line access) (379/61)
FOR 107  DF  .~.~.~ With privacy or lockout (e.g., identity verification) (379/62)
FOR 108  DF  .~.~ Including supervisory or control signalling (379/63)
FOR 109  DF  HAVING SINGLE CHANNEL TELEPHONE CARRIER (379/64)
FOR 110  DF  .~ Including call signalling (e.g., ringing, off-hook, dialing) (379/65)
FOR 111  DF  .~ Over power line (379/66)
FOR 112  DF  TELEPHONE LINE OR SYSTEM COMBINED WITH DIVERSE ELECTRICAL SYSTEM OR SIGNALLING (E.G., COMPOSITE) (379/90)
FOR 113  DF  .~ Credit authorization (379/91)
FOR 114  DF  .~ Polling (e.g., audience survey) (379/92)
FOR 115  DF  .~ With transmission of a digital message signal over a telephone line (379/93)
FOR 116  DF  .~.~ Including switching station (379/94)
FOR 117  DF  .~.~ Access restricting (379/95)
FOR 118  DF  .~.~ Including terminal for display of digital information (379/96)
FOR 119  DF  .~.~ By voice frequency signal (e.g., tone code) (379/97)
FOR 120  DF  .~.~.~ By modulated audio tone (379/98)
FOR 121  DF  .~.~.~ Having acoustic link (379/99)
FOR 122  DF  .~ To produce visual-graphic copy reproduction (e.g., facsimile) (379/100)
FOR 123  DF  .~ Audio program distribution (379/101)
FOR 124  DF  .~ Remote control (379/102)
FOR 125  DF  .~.~ Of entrance or exit lock (379/103)
FOR 126  DF  .~.~ With indication (379/104)
FOR 127  DF  .~.~ From terminal (379/105)
FOR 128  DF  .~ Remote indication over telephone line (e.g., telemetry) (379/106)
FOR 129  DF  .~.~ Meter reading (379/107)
FOR 130  DF  .~ Telegraphy (379/108)
FOR 131  DF  .~.~ Over telephone line (379/109)
FOR 132  DF  COMPOSITE SUBSTATION OR TERMINAL (E.G., HAVING CALCULATOR, RADIO) (379/110)
FOR 133  DF  WITH AUDIO MESSAGE STORAGE AND RETRIEVAL (379/67)
FOR 134  DF  .~ Stored in digital form (379/88)
FOR 135  DF  .~.~ Subscriber control of central office message storage or retrieval (379/89)