GB2272346A - Telephone answering system - Google Patents
Telephone answering system Download PDFInfo
- Publication number
- GB2272346A GB2272346A GB9322183A GB9322183A GB2272346A GB 2272346 A GB2272346 A GB 2272346A GB 9322183 A GB9322183 A GB 9322183A GB 9322183 A GB9322183 A GB 9322183A GB 2272346 A GB2272346 A GB 2272346A
- Authority
- GB
- United Kingdom
- Prior art keywords
- telephone
- terminals
- control
- input
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
- H04M1/65—Recording arrangements for recording a message from the calling party
- H04M1/6505—Recording arrangements for recording a message from the calling party storing speech in digital form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A telephone answering system for use with a radio telephone comprises an integrated CODEC 26 for digitally encoding incoming messages received from the telephone network via line 32 and/or messages from the handset microphone via line 30. Encoded messages are stored in a RAM 40. Stored messages are decoded by the CODEC 26 and replayed via the telephone network via line 34 and or over the handset loudspeaker via line 36. The system is controlled by a microcontroller 38 which also interfaces with telephone control lines 42 in order to control the operation of the radio telephone transceiver. The system operates to answer a telephone call, play a prerecorded message and to store any resulting incoming message. Stored messages may be subsequently replayed. <IMAGE>
Description
TELEPHONE ANSWERING SYSTEM
This invention relates to a telephone answering system for use with a total access communication system (TACS), extended TACS (ETACS) cellular radio telephone network and/or newer systems such as GSM.
Formerly, to connect an answering device to a radio telephone network, it has been necessary to use a socalled "line emulator" which is connected to the telephone equipment at the receiving site. By providing a connection equivalent to a conventional socket for a land telephone, the line emulator allows a conventional telephone answering device to be connected to the radio telephone network. Such an arrangement has several disadvantages.
Firstly, the need for a line emulator adds significantly to the cost and complexity of connecting an answering device. Furthermore, such an arrangement is entirely unsuitable for a personal telephone of the type that may be carried in a pocket or the like, and even when installing such an arrangement in a vehicle, space and cable routings are often important considerations and thus the mounting and connection of a line emulator and an answering device, in addition to the units required to interface to the telephone network, may prove difficult.
In addition, a conventional answering device is unlikely to have been optimised for mobile use and thus will not be particularly small nor robust, nor will it necessarily be easy to power from a d.c., battery power source which may only have a small capacity. Furthermore, since most, if not all, conventional answering devices rely on an analogue tape system for message storage, such devices are not suited to operation in a harsh environment such as that found in a moving vehicle, which is typified by vibration, wide temperature variations and severe electrical and radio frequency interference.
An alternative system that has recently been implemented by radio telephone network operators, in the United Ringdom at least, permits calls to be stored centrally.
Call storage commences when a user notifies the operator that he is no longer available by radio telephone. When the user returns, he can call the operator and request that any stored messages are replayed to him over the air. Whilst such a system overcomes certain of the above disadvantages, it is inflexible and it requires the user to expend air time to listen to any messages. In addition, a periodic subscription fee is charged for use of the service.
It is an object of the present invention to overcome at least some of the disadvantages of prior telephone answering systems by providing a compact, robust system that obviates the need to transmit stored messages over the air.
According to the invention, a telephone answering system for responding to an incoming call received via a TACS and/or ETACS cellular radio telephone network, comprises voice encoding means comprising audio input terminals for coupling to an audio input system and telephone input terminals for coupling to the telephone network, and for generating digital voice data from at least one input audio message received via the telephone input terminals and/or the audio input terminals, voice storage means coupled to the encoding means, for storing the digital voice data, voice decoding means comprising audio output terminals for coupling to an audio output system and output telephone terminals for coupling to the telephone network, and coupled to the storage means for receiving the voice data from the storage means and for generating at least one output audio message from the voice data, for transmission via the output telephone terminals and/or replay via the audio output terminals, and tr means coupled to the encoding means, the decoding means and an operating keypad having at least one operating key, and comprising control telephone terminals for coupling to the telephone network, the control means being operable to (a) cause the decoding means to generate at least output message and to transmit it via the output telephone terminals in response to the start of the incoming call, (b) cause the storage in the storage means, of voice data generated by the encoding means from any subsequent input message received via the input telephone terminals, and (c) upon receipt of an operating command from the operating keypad, cause the decoding means to generate at least one output message and to replay it via the audio output terminals.
s
The system is typically implemented as a stand-alone unit which is inserted in a cable between a radio telephone transceiver and its associated handset. The system may operate in two distinct modes selected using the operating keypad.
In a first, "transparent" mode, all signals between the transceiver and handset are passed through unaltered and the transceiver/handset combination is allowed to operate as a conventional radio telephone.
In a second "answer" mode, the system may operate to take control of the transceiver by emulating the control signals that would normally be generated by the handset and/or the transceiver i.e. by generating transceiver signals of the type which would normally be generated by the transceiver to control the handset and conversely by generating handset signals to control the transceiver.
Having taken control of the transceiver, it may be used to couple the encoding, decoding and control means to the telephone network. Also, the microphone and loudspeaker housed in the handset (or fitted to the vehicle in a hands-free implementation) may be used by the encoder and decoder for message reception and replay.
Alternatively, the system may be incorporated in one of the units conventionally required in a radio telephone installation; the transceiver unit, for example. The answer mode is then offered as a factory-installed option with activation from the handset.
As a further alternative, the system may be designed for use with a hand-portable cellular radio telephone. This may be achieved in several ways: (i) by providing a plug-in module which clips to
the base or back of the phone and which makes
use of connection terminals provided on the
phone.
(ii) by incorporation of the system into a stand
alone base unit into which the phone is
inserted.
(iii) a stand-alone base unit as in (ii) above but
also incorporating a battery charger for the
phone battery.
(iv) by incorporating the system in a device which
may be interposed between the phone and a so
called hands-free car kit
The voice storage means is preferably an integrated semiconductor memory (such as RAM and/or ROM) and is used for storing a personal announcement or "out-going message" (OGM) for transmission in response to the start of an incoming call, and for storing any incoming messages. This in conjunction with an integrated semiconductor CODEC comprising the encoding and decoding means with if required, external amplification and buffering of the input and output messages, permits the system to be made without moving parts. A system made in this way can be more reliable and more compact than a mechanical system using magnetic tape storage.
The operating keypad preferably has no more than two keys. It may be housed separately from the other components of the system, allowing the keypad to be placed at a location convenient for the user, whilst the other parts of the system may be placed out of sight, in a vehicle boot, for example.
Preferably in answer mode, the handset display is used to show status information such as the number of incoming messages that have been stored. At least some of the keys on the handset are preferably disabled, at least to prevent the user accidentally switching the radio telephone off. Such action would switch the transceiver off which would prevent the system from transmitting or receiving via the telephone network.
The invention will now be described by way of example with reference to the drawings, in which :
Figure 1 is a schematic diagram of a system in accordance with the invention, installed as part of a radio telephone installation;
Figure 2 is a block diagram of the system of Figure 1;
Figure 3 is a flow chart of typical user operations upon initial entry to a vehicle to initialise the system of
Figure 1; and
Figures 4A and 4B form a flow chart of typical user operations when returning to a vehicle equipped with the system of Figure 1 (Figures 4A and 4B are intended to be laid end-to-end).
The system described below may be used in a vehicle but can be adapted for use with a personal telephone or in other mobile automatic answering applications.
With reference to Figure 1, a system in accordance with the invention comprises, a main unit 2 connected in a cable 4a, 4b that would conventionally run directly from a radio telephone transceiver 6 to a handset cradle 8.
Connected to the cradle 8 is a handset 9.
The transceiver 6, cradle 8 and handset 9 may already be installed in the vehicle as part of a radio telephone installation, in which case the only required electrical alteration to the installation is disconnection of the cable between the transceiver 6 and the cradle 8, this cable then being used as either cable 4a or cable 4b in
Figure 1.
The main unit houses an interface printed circuit board (PCB) 10 which interfaces with the handset cradle 8 and the transceiver 6, and a system PCB 12 which controls the answer functions. The interface PCB 10 is tailored to accept and generate the signals of a particular transceiver/handset cradle combination and would be different for each type of installation. The other parts of the system are common for all installations.
The interface PCB 10 can be made to operate in a "transparent" mode wherein signals are passed between the transceiver 6 and the handset cradle 8 without alteration, allowing normal operation of the radio telephone. The interface PCB 10 can also be made to operate in an "answer" mode wherein it emulates a transceiver/handset combination in order to take over control of the transceiver 6 and the handset 9.
Also connected to the main unit is a control head (or keypad) 14. This has an "On/Off" key 16 and a "Review" key 18. The keys are non-latching push buttons and each has a LED mounted in its visible face. Key 16 has a green LED 16a and key 18 has a red LED 18a which are used to indicate status information. In an alternative embodiment, LED 16a and LED 18a are mounted in the panel surrounding the keys. The control head 14 is designed with only two buttons and may, therefore, be very compact, and can be mounted within reach of the vehicle's driver, whilst the main unit may be mounted elsewhere in the vehicle.
The handset 9 has an LCD display 22 and a keypad 24. In answer mode, status information is made to appear on the handset display 22 and the keypad 24 is partially disabled. In particular, the display 22 is used to indicate that the system is in answer mode and to indicate how many incoming messages have been stored.
Also, a "call-screening" feature is provided whereby the user may interrupt ("break in") the storage of an input message. This feature operates in one of two ways
i) In answer mode, the system will automatically
answer the phone after a preset number of rings (for
example after the second ring). If the user lifts
the handset (or presses Send in a hands-free
implementation) before the system has answered the
phone, answer mode is temporarily disabled and the
user may speak to the incoming caller in a normal
manner. Upon replacement of the handset, the system
automatically reverts to answer mode.
ii) If the system has already answered the call, it
may be disabled using the key 16, thereby putting
the system in transparent mode. The user may then
talk to the incoming caller in a normal manner.
With reference to Figure 2, mounted on the system PCB 12 are a CODEC 26 which is connected via buffers 28a, 28b, 28c, 28d to transmit and receive input lines 30, 32 and transmit and receive output lines 34, 36. These lines are connected to the interface board and carry the audio signals that would usually pass directly between the transceiver 6 and the handset cradle 8. The CODEC 26 uses a sample rate of 32Rbits/s and can operate to encode audio signals present on lines 30 and 32 in order to store an OGM or to store incoming messages respectively.
It can also operate subsequently to replay these messages via lines 34 and 36 to permit the user to hear messages, to review a stored OGM (via line 36), or to replay the
OGM over air, via line 34. Alternatively in transparent mode, the signals on lines 30 and 32 are passed directly through to lines 34 and 36 respectively.
Connected to the CODEC are control means implemented as a RISC microcontroller 38. Associated with this is a dynamic RAM block 40 which is used to store voice data for encoding and decoding by the CODEC. The control head 14 is connected to the microcontroller 38. A control bus 42 runs between the microcontroller and the interface PCB 10 and serves to control the operation of the radio telephone line protocols and to enable the emulation of the handset/cradle combination.
The microcontroller 38 coordinates the functions of the system in both "answer" and "transparent" modes. The
CODEC incorporates an automatic voice detection feature which operates by monitoring the audio level on lines 30 and/or 32. When the level drops below a predetermined threshold, a flag is set. The flag is monitored by the microcontroller 38 which terminates recording of a message (incoming call or OGM) when no voice sound is detected for more than 2 seconds. This serves to conserve storage capacity. Additional functions of the system are summarised in the flow-charts of Figure 3 and
Figure 4.
Claims (12)
1. A telephone answering system for responding to an
incoming call received via a TACS, ETACS and/or GSM
cellular radio telephone network, comprising:
voice encoding means comprising audio input
terminals for coupling to an audio input system and
telephone input terminals for coupling to the
telephone network, and for generating digital voice
data from at least one input audio message received
via the telephone input terminals and/or the audio
input terminals;
voice storage means coupled to the encoding
means, for storing the digital voice data;;
voice decoding means comprising audio output
terminals for coupling to an audio output system and
output telephone terminals for coupling to the
telephone network, and coupled to the storage means
for receiving the voice data from the storage means
and for generating at least one output audio message
from the voice data, for transmission via the output
telephone terminals and/or replay via the audio
output terminals; and
control means coupled to the encoding means,
the decoding means and an operating keypad having at
least one operating key, and comprising control
telephone terminals for coupling to the telephone
network, the control means being operable to (a)
cause the decoding means to generate at least output
message and to transmit it via the output telephone
terminals in response to the start of the incoming
call, (b) cause the storage in the storage means, of
voice data generated by the encoding means from any
subsequent input message received via the input
telephone terminals, and (c) upon receipt of an
operating command from the operating keypad, cause
the decoding means to generate at least one output
message and to replay it via the audio output
terminals.
2. A system according to claim 1, wherein the control
means is operable to pass, signals input via the
input telephone terminals to the output audio
terminals in substantially unaltered form and to
pass signals input via the input audio terminals to
the output telephone terminals in substantially
unaltered form.
3. A system according to any preceding claim, wherein
the telephone control terminals are coupled to a
radio telephone transceiver and wherein the control
means is operable to send and receive control
signals via the control terminals and thereby to
monitor the status of the transceiver and to control
its operation.
4. A system according to claim 3, wherein the control
terminals are coupled to handset terminals on the
transceiver and wherein the control signals comprise
emulated handset signals.
5. A system according to claim 3 or claim 4, wherein
the control terminals are coupled to a handset and
wherein the control signals comprise emulated
transceiver signals.
6. A system according to claim 5, wherein the emulated
transceiver signals comprise signals operable to
instruct a display unit on the handset.
7. A system according to any preceding claim, forming
an integral part of a conventional radio telephone
system.
8. A system according to any preceding claim, wherein
the encoding means, the decoding means and the
control means are housed together.
9. A system according to any preceding claim, arranged
to be mountable on a hand-portable radio telephone.
10. A system according to any preceding claim forming an
integral part of a base unit for a hand-portable
radio telephone.
11. A system according to any preceding claim wherein
the voice storage means comprises an integrated
semiconductor memory device.
12. A telephone answering system constructed and
arranged substantially as herein described and shown
in the drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9322183A GB2272346A (en) | 1992-10-28 | 1993-10-28 | Telephone answering system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929222612A GB9222612D0 (en) | 1992-10-28 | 1992-10-28 | Telephone answering system |
GB9322183A GB2272346A (en) | 1992-10-28 | 1993-10-28 | Telephone answering system |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9322183D0 GB9322183D0 (en) | 1993-12-15 |
GB2272346A true GB2272346A (en) | 1994-05-11 |
Family
ID=26301872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9322183A Withdrawn GB2272346A (en) | 1992-10-28 | 1993-10-28 | Telephone answering system |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2272346A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2285368A (en) * | 1993-12-28 | 1995-07-05 | Hashimoto Corp | Answering device for a vehicle-mounted mobile telephone |
WO1995034984A1 (en) * | 1994-06-14 | 1995-12-21 | Ericsson Inc. | A mobile phone having digital voice storage capability |
GB2311189A (en) * | 1996-03-15 | 1997-09-17 | Casio Phonemate Inc | Telephone answering device |
GB2314231A (en) * | 1996-06-14 | 1997-12-17 | John Anthony Clarke | Mobile telephone with message store |
US5819069A (en) * | 1996-02-27 | 1998-10-06 | Nexcom Technology, Inc. | Recording apparatus and method having low power consumption |
GB2332121A (en) * | 1997-12-05 | 1999-06-09 | Motorola As | Two way radio communication system, radio unit and method of operation |
EP1168861A1 (en) * | 1994-07-19 | 2002-01-02 | Mitsubishi Denki Kabushiki Kaisha | Portable radio communication apparatus with automatic answering |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5058150A (en) * | 1989-02-28 | 1991-10-15 | Samsung Electronics Co., Ltd. | Automatic answering method for a vehicle radio-telephone and device therefor |
GB2254524A (en) * | 1991-03-08 | 1992-10-07 | Nokia Mobile Phones Ltd | Mobile telephone with answering machine facility |
GB2254986A (en) * | 1991-03-08 | 1992-10-21 | Nokia Mobile Phones Ltd | Device for storing and reproducing speech |
-
1993
- 1993-10-28 GB GB9322183A patent/GB2272346A/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5058150A (en) * | 1989-02-28 | 1991-10-15 | Samsung Electronics Co., Ltd. | Automatic answering method for a vehicle radio-telephone and device therefor |
GB2254524A (en) * | 1991-03-08 | 1992-10-07 | Nokia Mobile Phones Ltd | Mobile telephone with answering machine facility |
GB2254986A (en) * | 1991-03-08 | 1992-10-21 | Nokia Mobile Phones Ltd | Device for storing and reproducing speech |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5559863A (en) * | 1993-12-28 | 1996-09-24 | Hashimoto Corporation | Car telephone accessory device with telephone answering function |
GB2285368A (en) * | 1993-12-28 | 1995-07-05 | Hashimoto Corp | Answering device for a vehicle-mounted mobile telephone |
WO1995034984A1 (en) * | 1994-06-14 | 1995-12-21 | Ericsson Inc. | A mobile phone having digital voice storage capability |
US5630205A (en) * | 1994-06-14 | 1997-05-13 | Ericsson Inc. | Mobile phone having voice message capability |
US7218916B2 (en) | 1994-07-19 | 2007-05-15 | Mitsubishi Denki Kabushiki Kaisha | Portable radio communication apparatus |
EP1168861A1 (en) * | 1994-07-19 | 2002-01-02 | Mitsubishi Denki Kabushiki Kaisha | Portable radio communication apparatus with automatic answering |
US6282504B1 (en) | 1996-02-27 | 2001-08-28 | David K. Wong | Method of receiving a facsimile message |
US5819069A (en) * | 1996-02-27 | 1998-10-06 | Nexcom Technology, Inc. | Recording apparatus and method having low power consumption |
US5768349A (en) * | 1996-03-15 | 1998-06-16 | Casio Phonemate, Inc. | Voice mail telephone answering device |
GB2311189B (en) * | 1996-03-15 | 2000-06-21 | Casio Phonemate Inc | Voice mail telephone answering device |
GB2311189A (en) * | 1996-03-15 | 1997-09-17 | Casio Phonemate Inc | Telephone answering device |
GB2314231A (en) * | 1996-06-14 | 1997-12-17 | John Anthony Clarke | Mobile telephone with message store |
GB2332121A (en) * | 1997-12-05 | 1999-06-09 | Motorola As | Two way radio communication system, radio unit and method of operation |
Also Published As
Publication number | Publication date |
---|---|
GB9322183D0 (en) | 1993-12-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |