(A) Systems, processes and instruments for the two-way electrical
transmission of intelligible audio information having arbitrary
content over a link including an electrical conductor, between spaced
apart locations, so as to enable conversation therebetween, and
intended for the private use of a listener or a group of listeners.
The term "intelligible" used above is intended to include the capability
for transmission of speech or the like (e.g., music), rather than
restriction to a specified audible signal, such as a bell or buzzer.
(B) Switching, signalling or signal transmission peculiar to,
or specified as for a telephone or a telephone system, except for
multiplex communications as indicated in Lines With Other Classes
and Within This Class, below.
(C) Subsystems, elements and adjuncts peculiar to such transmission
and not provided for elsewhere.
SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
(1) Bi-directional audio communication is normally a duplex
arrangement, and simultaneous audio transmission of a single conversation
is in this class (379) and excluded from Class 370, Multiplex Communications, in
the absence of some other particular multiplexing technique.
(2) With exception of voice signal duplexing as pointed out
in (1) above, subject matter including multiplexing, particularly
involving plural conversations, regardless of recitation of telephone
limitations, is excluded from this class (379) and is classified
elsewhere.
(3) Audible signalling for call alerting, or producing a signal
having other specific content, such as bells, buzzers, etc., are
classified elsewhere, even if nominally characterized as used in
a telephone.
(4) Electromagnetic switches for automatic telephone switching
type, per se, are classified elsewhere.
(5) Electrical connectors merely nominally characterized as
for telephones, in the absence of additional telephone structure
are classified elsewhere.
(6) Named communications or telecommunications networks absent
recitation of telephone or voice limitation are not classifiable
herein.
(7) The following terms when used in a communication system
or instrument are considered to specify telephone equipment except
as specified in (2) above with respect to multiplexing or in class
or subclass search notes: dial tone - off-hook, handset - on-hook,
hookswitch - ringback, howler - sidetone, intercom - switchboard,
key set - switchhook, telephone line (used with switching system),
tip and ring (leads)
RELATIONSHIP TO OTHER SPEECH COMMUNICATIONS CLASSES
This class (379) requires the capability for two-way spoken
communications, or specified used of a telephone line, and subsystems
peculiar to either of the above.
A mechanical telephone is classified elsewhere. See References
to Other Classes, below.
All speech or telephone equipment which conceals message content
despite interception or unauthorized reception of a telephone signal
is classified elsewhere. See References to Other Classes, below.
Electrical speech processing system and apparatus, including
for example, such systems as, megaphones, public address systems
and hearing aids; and transducers such as microphones, earphones
or loudspeakers and also includes either of a telephone microphone
or receiver are classified elsewhere. See References to Other Classes,
below.
Audio signal telecommunications by a modulated carrier wave
not having telephone land line structure or limitations is classified
elsewhere. See References to Other Classes, below.
SECTION III - SUBCLASS REFERENCES TO THE CURRENT CLASS
Communications: Electrical, for audible signalling for call alerting, or producing
a signal having other specific content, such as bells, buzzers,
etc., even if nominally characterized as used in a telephone.
Multiplex Communications, for subject matter including multiplexing, particularly
involving plural conversations, regardless of recitation of telephone
limitations;
subclasses 276+ for duplex transmission.
Cryptography, includes all speech or telephone equipment which
conceals message content despite interception or unauthorized reception of
a telephone signal.
Electrical Audio Signal Processing and Systems, a generic electrical speech processing system and
apparatus class and includes, for example, such systems as, megaphones,
public address systems and hearing aids; and transducers such as
microphones, earphones or loudspeakers and also includes either
of a telephone microphone or receiver, but not their combination
as in a handset.
Telecommunications, includes audio signal telecommunications by a modulated
carrier wave not having telephone land line structure or limitations.
SECTION V - GLOSSARY
BI-DIRECTIONAL
Capable of use, particularly in transmitting information in
two opposite directions. Additionally, when used to describe an
audio transducer, capable of conversion of sound both to and from
electrical signal variations.
CALL ADDRESS SIGNAL
An electrical representation of a called terminal designation
(i.e., telephone number) which controls switching apparatus to establish
a connection from a calling terminal.
DIALING
Generating a call address signal. Although a dial is
a rotary pulse generating switch, the term dialing is sometimes
used generically as in the terms "tone dialing" and "resistance
dialing".
SUBSCRIBER
Telephone user or service location.
SUBSCRIBER
Telephone circuitry or instruments at subscriber location.
TELEPHONE
An instrument, known as a user terminal set, containing an
audio reproducer, and a speech-to-electricity transducer. An obsolete
usage of this term (telephone) is broad enough to include a microphone
or reproducer; however, a microphone or reproducer, per se, is classified
in Class 381.
DIAGNOSTIC TESTING, MALFUNCTION INDICATION, OR ELECTRICAL CONDITION
MEASUREMENT:
This subclass is indented under the class definition. Subject matter for either (a) evaluating or monitoring the
condition of a telephone system or a component thereof in order
to determine the presence of a faulty or nonstandard condition or
(b) quantitatively determining an electrical parameter of a telephone
system or component thereof.
(1)
Note. Testing to determine which one of several normal status
conditions exist (e.g., busy-idle, off-hook) is not classified in
this or indented subclasses.
(2)
Note. The testing or measurement must be specifically claimed
as in or for a telephone system or a component thereof for classification
in this or indented communication or telecommunication system is not
sufficient for classification in these subclasses.
Electricity: Electrical Systems and Devices,
subclasses 1 through 138for safety and protection of electrical systems
and devices not provided elsewhere.
Telecommunications,
subclasses 423 through 425,67.11-67.7, 115.1-115.4 and subclasses 226.1-226.4
for testing of a cellular radiotelephone system, system having transmitter
and receiver at separated stations, and transmitter or receiver
only station, respectively.
This subclass is indented under subclass 1.01. Subject matter including testing or qualifying an instrument
used for the retention, recovery, or formation of an audible information
signal (e.g., voice mail).
This subclass is indented under subclass 1.01. Subject matter including testing a two wire telephone
line using an audio modulated data signal to indicate proper line
quality.
This subclass is indented under subclass 1. Subject matter for testing a device for coupling a two-wire
to four-wire interconnecting circuit or for eliminating an echo
effect in a telephone system.
This subclass is indented under subclass 1. Subject matter which tests a device which amplifies or transfers
a signal between two telephone circuits, or circuit sections.
Multiplex Communications,
subclass 243 for fault detection of a multiplex repeater, and
subclasses 246+ for testing of a standard operation of
a multiplex repeater.
This subclass is indented under subclass 1. Subject matter to determine whether an undesired or surreptitious
receiving device is connected to telephone equipment.
This subclass is indented under subclass 1. Subject matter for evaluating the operation of a system
or component which selectively connects two of a plurality of telephone
lines for communication therebetween.
This subclass is indented under subclass 9. Subject matter including testing a new or replacement
software in a telephone switching system to ensure its proper operation.
This subclass is indented under subclass 9. Subject matter including the use of a computer workstation
for monitoring or routine testing the telephone network.
This subclass is indented under subclass 9. Subject matter including generating action reports with
regards to the outcome of a particular testing sequence including
initial input parameters.
This subclass is indented under subclass 9. Subject matter including the use of a spare equipment
in case of failure or overload of the primary system.
This subclass is indented under subclass 9. Subject matter including testing of circuitry which connects
a subscriber line or instrument to a telephone switching system
or network (e.g., analog to digital interface).
(1)
Note. The subscriber line interface circuitry (SLIC) performs
conventional Borscht functions such as, power to the telephone (battery
feed), over voltage protection, ringing, on or off hook status (supervision),
codec, 2 to 4 wire conversion (hybrid), and testing.
This subclass is indented under subclass 9. Subject matter which serially performs plural steps included
in a central switching arrangement evaluation.
This subclass is indented under subclass 10.01. Subject matter which automatically places the call by
the test equipment in order to perform the testing operation.
This subclass is indented under subclass 9. Subject matter for evaluating the operation of a individual
telephone central office or peripheral equipment.
This subclass is indented under subclass 15.01. Subject matter wherein computer based elements control
the operation of the telephone network via out of band signaling
(e.g., signaling system 7).
This subclass is indented under subclass 15.01. Subject matter includes testing the implementation or
operation of newly added functions to the system (e.g., special
services)
This subclass is indented under subclass 1. Subject matter in which a line test or measurement is performed
with a device which is small and light enough to be easily carried
by an individual.
This subclass is indented under subclass 1. Subject matter wherein a characteristic of an interexchange
or in specified telephone conductor is evaluated.
This subclass is indented under subclass 22. Subject matter including transmitting a known signal from
a testing location over a communication path to a second remote
location which retransmits the known signal back to the testing location
for use in evaluating the transmission path or a device are the
remote location.
Error Detection/Correction and Fault Detection/Recovery,
subclass 716 , for loopback testing of a communications circuit
of general utility by a digital test signal.
This subclass is indented under subclass 22.01. Subject matter which includes placing a signal into the
system to be tested and comparing the parameters of the output signal
from the system over a continuous range with the corresponding parameters
of the signal input.
(1)
Note. Such testing is often used in determination of degradation
or crosstalk.
This subclass is indented under subclass 22.01. Subject matter to determine the presence or location of
a conductor fault in a telephone line conductor.
Telecommunications,
subclasses 423 through 425,67.11-67.7, 115.1-115.4 and subclasses 226.1-226.4
for testing in a cellular radiotelephone system, system having
transmitter and receiver at separated stations, and transmitter
or receiver only station, respectively.
This subclass is indented under subclass 22.03. Subject matter to determine the presence or location of
a loop fault in a network transmission equipment used to provide
a pair gain function.
This subclass is indented under subclass 22.04. Subject matter which includes a test controller connecting
in tandem between testing facilities and central office switch
which responds to test initiation signals by connecting a metallic
pair to the test facilities at one end and to the subscriber voice
frequency drop at the other end.
This subclass is indented under subclass 22.03. Subject matter which includes an accessing device connected
between the testing equipment and the device under test for facilitating the
testing process or procedure.
This subclass is indented under subclass 22.03. Subject matter where a test signal is applied to more
than one conductors under test to locate the fault.
This subclass is indented under subclass 22.03. Subject matter wherein the evaluated parameter is representative
of an unwanted electrical disturbance or a spurious signal in the
circuit or substance being measured or tested.
This subclass is indented under subclass 22. Subject matter including structure for providing a quantitative
indication of an electrical characteristic of the line or trunk
or the signal thereon.
This subclass is indented under subclass 1.01. Subject matter for evaluating, measuring, or monitoring
a characteristic of a subscriber s line or card as well as service
function of an interface.
(1)
Note. Include herein the U or T type network terminating
interface, COT, SLIC, etc.
This subclass is indented under subclass 26.01. Subject matter which includes an automated diagnosis circuit
connected thereto and automatically places test signals to test
the subscriber s line card.
This subclass is indented under subclass 1.01. Subject matter for evaluating, measuring, or monitoring
a characteristic of a subscriber line or station.
This subclass is indented under subclass 27.01. Subject matter which includes placing a signal into the
system to be tested and comparing the parameters of the output signal
from the system over a continuous range with the corresponding parameters
of the signal input.
This subclass is indented under subclass 27.01. Subject matter which includes placing signals into the
system to be tested by using programmable, or automated testing
device.
Electricity: Electrical Systems and Devices,
subclasses 1 through 138,for safety and protection of electrical systems
and devices not provided elsewhere.
This subclass is indented under subclass 27.01. Subject matter which includes connection or disconnection
device for physically connecting or disconnecting communication
device from or to the telephone line.
This subclass is indented under subclass 27.01. Subject matter includes simple faulty identification device
capable to plug into telephone jack or to couple to tip and ring
wires in subscriber s premises location to troubleshoot problem
appeared on subscriber s loop or terminal.
This subclass is indented under subclass 27.01. Subject matter including a remote arrangement to facilitate
localization of faults in, or localized testing of, either a substation
or a subscriber loop.
(1)
Note. The testing may be performed either at the substation
or remotely, e.g., from a central office.
This subclass is indented under subclass 29.01. Subject matter which includes a single metallic test pair
providing between the central office and the remote terminals of
the pair gain system to accomplish metallic testing of the voice frequency
drops for a plurality of carrier-served subscribers.
This subclass is indented under subclass 29.01. Subject matter wherein a directory number of call equipment
at originating site is dialed back, or identity (i.e., caller ID)
of the call equipment at originating site is transmitted back from
a device under test.
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