GB2166321A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Emergency call unit
Assignee: Tunstall Telecom Ltd
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Filing: 1985-10-31
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Granted: —
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Expires: 2005-10-31
Abstract
Abstract A call unit for use in an emergency call system comprises speech receiving and transmitting means (11) capable of operating in a handsfree mode. A first non-volatile memory (10a) stores information determining the destination of an emergency call made from the unit. Such call is initiated by microprocessor operating means (9) operating in a normal mode in response to a control signal from a generator, for example a radio signal generator (6), located remote from the unit. This operation initiates dialling by an automatic dialler (8) to an emergency call destination, and on connection handsfree two-way speech communication is permitted. The unit includes switch means (16) having a first normal switching condition in which the microprocessor operates in the normal mode. The switch means (16) responds to an incoming call signal on the telephone line to adopt a second switching condition causing the microprocessor to operate in a receive mode. In this mode receipt of a control signal from the signal generator (6) causes the microprocessor to enable handsfree two-way speech communication between the call unit and the incoming caller without the use of the unit physically having to be present at the call unit itself. <IMAGE>
Inventors
- 👤 Russell Stuart Pinder
- 👤 David Jones
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-23 01:52
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
203 words
A call unit for use in an emergency call system, the unit comprising speech receiving and transmitting means capable of operating in a handsfree mode, an automatic dialler, a first nonvolatile memory capable of storing at least a first set of information that determines the destination of an emergency call made from the unit, operating means which in normal mode is responsive to a control signal from a control signal generator located remote from the unit to initiate autodialling to the emergency call destination via a telephone line to which the call unit is connected, and means enabling handsfree two-way speech communication between the call unit and the emergency call destination once telephonic connection has been established therebetween, in which the call unit includes switch means having a first normal switching condition in which the operating means is enabled to operate in said normal mode, and responsive to an incoming call signal on the telephone line to adopt a second switching condition in which the operating means is enabled to operate in a receive mode wherein on receipt of a control signal from the control signal generator the operating means enables handsfree two-way speech communication between the call unit and the incoming caller.
Claim 2
Dependent Claim
203 words
A call unit for use in an emergency call system, the unit comprising speech receiving and transmitting means capable of operating in a handsfree mode, an automatic dialler, a first nonvolatile memory capable of storing at least a first set of information that determines the destination of an emergency call made from the unit, operating means which in normal mode is responsive to a control signal from a control signal generator located remote from the unit to initiate autodialling to the emergency call destination via a telephone line to which the call unit is connected, and means enabling handsfree two-way speech communication between the call unit and the emergency call destination once telephonic connection has been established therebetween, in which the call unit includes switch means having a first normal switching condition in which the operating means is enabled to operate in said normal mode, and responsive to an incoming call signal on the telephone line to adopt a second switching condition in which the operating means is enabled to operate in a receive mode wherein on receipt of a control signal from the control signal generator the operating means enables handsfree two-way speech communication between the call unit and the incoming caller.
Claim 3
Dependent Claim
36 words
A call unit according to claim 1 in which the operating means when in said normal mode is capable of responding to a control signal from any one of a plurality of remote control signal generators.
Claim 4
Dependent Claim
46 words
A call unit according to claim 2 in which the operating means when in said receive mode is capable of responding to a control signal from at least one selected remote control signal generator, but not from at least one other remote control sig nal generator.
Claim 5
Dependent Claim
38 words
A call unit according to any one of the preceding claims in which the operating means when in said normal and said receive mode is capable of responding to a control signal not requiring wire for its transmission.
Claim 6
Dependent Claim
27 words
A call unit according to claim 4 in which the control signal is a radio signal and the operating means includes a radio receiver for said signal.
Claim 7
Dependent Claim
43 words
A call unit according to any one of the preceding claims in which said switch means is a unit capable of detecting a ringing signal on the incoming telephone line, and of adopting said second switching condition on detection of said ringing signal.
Claim 8
Dependent Claim
19 words
A call unit according to any one of the preceding claims in which said operating means comprises a microprocessor.
Claim 9
Dependent Claim
111 words
A call unit according to any one of the preceding claims, and including a second non-volatile memory capable of storing at least a second set of information that determines the destination of a normal, non-emergency, telephone call made from the unit, and the operating means, when enabled to operate in said normal mode, operates on receipt of a control signal to initiate a call to the emergency call destination in accordance with said first set of information if said first set of information is present in said first memory, or, if said first set of information is absent from said first memory, to initiate a call to the normal call destination.
Claim 10
Dependent Claim
51 words
A call unit according to claim 8 in which said second set of information comprises a plurality of telephone numbers each for a respective normal call destination, said numbers each have a priority allocation, and said operating means initiates said normal destination call to the number with the highest priority allocation.
Claim 11
Dependent Claim
35 words
A call unit according to claim 8 or claim 9 in which the unit includes a manually operable keypad by way of which said second set of information may be entered into said second memory.
References Cited (Backward Citations)
No citation records indexed.
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