CA1190633A - Arrangement for multiple custom calling - Google Patents
Arrangement for multiple custom callingInfo
- Publication number
- CA1190633A CA1190633A CA000413621A CA413621A CA1190633A CA 1190633 A CA1190633 A CA 1190633A CA 000413621 A CA000413621 A CA 000413621A CA 413621 A CA413621 A CA 413621A CA 1190633 A CA1190633 A CA 1190633A
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- CA
- Canada
- Prior art keywords
- subscriber
- custom calling
- call
- telephone
- custom
- 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.)
- Expired
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- 238000009877 rendering Methods 0.000 claims 1
- 230000015654 memory Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 101100400378 Mus musculus Marveld2 gene Proteins 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2203/00—Aspects of automatic or semi-automatic exchanges
- H04M2203/50—Aspects of automatic or semi-automatic exchanges related to audio conference
- H04M2203/5009—Adding a party to an existing conference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/428—Arrangements for placing incoming calls on hold
- H04M3/4288—Notifying a called subscriber of an incoming call during an ongoing call, e.g. Call Waiting
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Exchange Systems With Centralized Control (AREA)
Abstract
TITLE
AN ARRANGEMENT FOR MULTIPLE CUSTOM CALLING
ABSTRACT
The arrangement described herein provides for simple control and minimal program impact of a central office switching system for interfacing multiple custom calls. This arrangement employs a few simple trunks connected in a loop around configuration.
The arrangement shown considers the connection of a telephone subscriber to a call waiting subscriber who is already engaged as a non-control party in another custom calling subscriber's three way call.
AN ARRANGEMENT FOR MULTIPLE CUSTOM CALLING
ABSTRACT
The arrangement described herein provides for simple control and minimal program impact of a central office switching system for interfacing multiple custom calls. This arrangement employs a few simple trunks connected in a loop around configuration.
The arrangement shown considers the connection of a telephone subscriber to a call waiting subscriber who is already engaged as a non-control party in another custom calling subscriber's three way call.
Description
TITLE
AN ARRANG~MENT FOR MULTIPLE CUSTO~ CALLING
BACKGROUND OF THE INVENTION
(1) Field o~ the Invention:
The present invention pertains to mul~iple custom telephone calling features and more particularly to an arrangement for controlling these custom calling features which interface with one another in a common central o~fice.
(2~ Description of the Prior Art:
As computerization was introduced into telephone switching offices, it was understood that more complex functions could be provided by the switch-ing office. Among these functions are such features as special ticketing and billing arrangements and custom calling features such as three way calling, call forwarding, speed calling, and call waiting.
To implement each of these special custom calling features complex hardware in the ~orm of trunk circuits and complex programs in the central processing unit of the switching office are required.
When these custom calling ~eatures interface with one another further complexity is added to both the trunking arrangement and the programO Among these features the more complex are call waiting and three way calling. These features are the most complex since they require the greatest amount of hardware and program to handle their operation. Call waiting 63~
service is defined as: A call waiting subscriber will hear a short tone, if he is already using his line and the second party is attempting to reach him.
The second party receives normal ring back tone and the line is split, 50 -that only the subscriber to be called will hear the short tone. The tone will be repeated in 10 seconds as a reminder, and if un-answered, the second party will receive ring back tone. If the subscriber wants to end his first call he simply hangs up and his phone will ring with the second party on the line. If he wants to hold the first party while answering the second, he presses the hookswitch for one-half a second. With this method he can switch between parties at will.
Three way calling service is defined as:
A three way calling subscriber can add a third party to an existing conversation. While the subscriber is conversing with another party, a third party can be added to the conversation by depressing his hook-switch for one-half a second. This puts the original party on hold, and the subscriber will hear a special dial tone (3 spurts of tone followed by regular dial tone). He can then dial the third party and hold a private conversation with the third party. To establish the three way connection the subscriber must again depress its hookswitch for one-half a second. If the third party did not answer or if the subscriber wants to drop a third party from the three way call, he simply depresses his hookswitch for one-half a second and the original parties are re-established (and the subscriber may again establish a three way call~. To disconnect, the subscriber simply hangs up and all connections will be broken downO
These custom calling features required 3~ specialized trunk arrangements and complex program for the manipulation of the connection of parties in response to hookswitch flashing. Arrangements for connectirlg custom calling subscribers individually are shown in an article entitled "Custom Calling Services on No. 1 E~X" by J. D. McLean in the GTE
Automatic Ele~tric Technical Journal, July, 1976, Vol. 15 - No. 3. This article shows basic configu-rations for the establishment of call waiting andthree way calling custom features as independent calls. This article shows the special trunks and junctors which were developed for the implementation of these custom calling ~eatures. However, the article does not deal with the interconnection of these custom calling features to one another and the resulting complexity added b~ this arrangement.
One manner in which to handle the pro~lem of interacting custom calls is to prevent subscribers ~rom calling other subscribers who have active custom calling features~ This is not a suitable solution since certain subscribers would be unable to reach whomever they chose to call. Another solution is to provide complex trunks or to increase the logic of the controlling program to accommodate all the interactions of two interacting custom calls~ However this situation results in expensive trunk arrangements which are undesirable since they increase the cost of the custom calling feature to the subscriber.
The above mentioned problems are further compounded when both of the interacting custom calls are made from the same switching office. Thîs situa-tion means that one switching office must control the operation of multiple custom calls, making the interacting decisions very complex.
Accordingly it is the object of the present invention to provide a simple trunking arrangement and program ~or the operation of multiple interacting custom calls within a particular telephone swi~ching ofEice ~or a call waiting party who is not the con trolling party in a three way call to receive another incoming call.
i33 SUMMARY OF rrHE INV~NTION
The present invention comprises an arrange-ment for multiple custom calling telephone call~
within a switching of~ice. Three telephone subscribers are connected in a three way call via a switching network. A fourth telephone subscriber attempts to call a first custom calling subscriber. If the dialed custom calling subscriber has call waiting service and is not the controlling subscriber in the three way call, the call waiting feature of the dialed custom calling subscriber is activated. Since the original three way call and call waiting call interact, there is a multiple custom calling situation.
Each subscriber is connected via a line circuit to the switching network. One of the custom calling subscribers has established a three way call between himself, another custom calling subscriber and a POTS ~plain old telephone service) subscriber.
Each of these subscribers is connected via the switch-ing network to a three way call trunk. The calledcustom calling subscriber has the call waiting feature.
When the stored program detects a second POTS subscriber's attempt to dial the second custom calling subscriber, the second custom calling subscriber's line is Eound busy. However, since this second custom calling subscribe~ has call waiting service and is not the controlling party in the three way call, he can selectively connect to the new incoming call and the existing three way call. It should be noted that a custom calling subscriber may have only one custom calling feature active at any one time. In the example above, if the call ~aiting subscriber was also the controlling party in the three way call, the new incoming call would receive busy tone.
In order to connect the new incoming call to the second custom calling subscriber~ the second custom calling subscriber is temporarily disconnected from the three way call. The stored program of the CPU provides the necessary holding to this subscriber.
Simultaneously, a path is established under control of the program from the proper port of the three way call to a loop around trunk. In addition, the program establishes another path from the loop around trunk to the second custom calling subscriber~ Lastly, a connection is established via the switching network to the new incoming caller by the program.
As a result the two custom calling subscribers are separated by the loop around trunk. The hookswitch flashed of these subscribers can be simply and easily interpreted by the trunk circuit and stored program.
The two custom calls operate as though they were located in different central switchin~ offices.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram depicting the overall network structure of associated with the present invention.
Figure 2 is a block diagram depicting the originating and terminating time stages of the present invention and their connection to the central processing unit.
Figure 3A is a block diagram depicting an existing three way call between two custom callers with another subscriber attempting to call one oE
the custom calling subscribers.
Figure 3B iS a block diagram depicting the multiple custom calling network arrangement in accordance with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Figure 1 is a block diagram showing a T-S-T
network of a digital switching center for switching a local to local telephone call between POTS subscribers.
Subscriber A is connected via an analog facility 3s interface unit (FIU) 10. The analog FIU 10 has a PCM voice connection to time switch and control unit (TCU) 0. Each TCU has 2 time s~ages associated with it, an originating time stage (OTS~ and a terminating time stage (TTS).
A connection is made from the OTS of a particular TCU to the 64 by 64 space switch 30. Then, a connection is established between the space swi~ch 30 and the terminating time stage of TCU 63, for example. Subscriber B is connected through analog FIU 20 to the TTS of TCU 63.
Next a voice transmission link is established form subscriber B to subscriber A. This communication link is established via FIU 20, the OTS of TCU 63, through space switch 30, through the TTS of TCU 0, through analog FIU 10 to subscriber A. As a result, a full talking path has been established between subscribers A and B.
Figure 2 shows the connection of a particular TCU to a corresponding microprocessor CPU 10. Each stage of a time and control unit includes an information memory and a control memoryO For example, the origi-nating time stage OTS shown includes an information memory 30 and a control memory 40. Microprocessor interface 20 connects the CPU 10 to the control memories 40 and 50.
The information memories 30 and 60 each contain information memory units with PCM samplesO
Up to four FIU's may be connected to each TCU. These FIU's may be analog line FIU's, connecting telephone subscribers to the network, as shown in figure 1 or analog trunk FIU's for connecting calls to service or outgoing trunk circuits.
ReEerring now to figure 3A, network 20 includes such elements as analog FIU's, time switch and control units, which further include information and control memories, and a space switching stage.
The configuration shown is that three subscribers B, C and ~ are connected in a three way call. Each of the subscribers A through D is connected to the switching network 10 via a line circuit 1 throuyh 4 respectively.
Subscriber B is shown to have call waiting service (CWT). Subscriber C is a three way calling subscriber (3WC), who initiated the three way call between subscriber B, D and himsel~. Subscribers A and D are plain old telephone service (POTS) subscribers.
Subscriber A is attempting to call subscriber B, a call waiting service subscriber. Subscriber B is already engaged as a called party in the three way call with subscribers C and D. Typically, subscriber A would receive a busy tone signal. Since subscriber B is a call waiting subscriber he will receive a tone signal indicating that subscriber A is attempting to call. Subscriber B is then able to manipulate his hookswitch to connect subscriber A.
As shown in figure 3B when the stored program of the CPU detects subscriber A's call to subscriber B, a reconfiguration is required~ The program must first determine that the called subscriber, B, has call waiting class oE service. Since subscriber B
is a call waiting custom caller and is engaged in an existing three way call, there is a multiple custom calling situation and special handling must occur.
The program must instruct the switching network 10 and three way call trunk 20 to disconnect subscriber B while providing the necessary hold in order to avoid dropping the call altogether. Next, the program selects a path from three way call trunk 20 through switching network 10 to loop around trunk 30. Simultaneously, a second path is es~ablished under program control from loop around trunk 30 through switching network 10 to subscriber B.
Lastly, a connection is established from subscriber A to subscriber B via switching network 10 under control of the program. As a result of ~he connection of loop around ~runk 30, the two cus~om calls (the three way call between subscribers BJ C
and D and the call waiting call between subscribers A, B and C) are isolated from one ano~her~ Now hookswitch ~9~633 flashes of subscriber B are interpreted by the CPU's program via sensors associated with each subscriber's line circuit and not forwarded through loop around trunk 30.
Since the hookswitch flashes of subscriber B are separated from those of subscriber C and vice versa, the basic logic design of all the system's trunks, such as the three way call trunk 20, are greatly simplified. This is contrasted with a sub-stantially more complex arrangement oE three way call trunk 20 required for handling multiple hookswitch flashes for both custom calling subscribers B and C.
The loop around trunk 30 makes the two custom calls appear as though they are in different switching centers connected by a trunk circuit. As a result, the control trunk logic is minimi~ed. In addition, the program logic required for outgoing custom calls and intra-office custom calls may be similar resulting in the great savings of pro~ram logic. The program logic saved via loop around this configuration is equivalent to approximately 1000 manhours of design development time.
It is to be noted that the complex situation of subscriber disconnects during multiple custo~ calls is handled as though only a single custom call was involved. This is a further xesult of the separation via loop around trunk 3~ of the two custom calls.
Although a preferred embodiment of the invention has been illustrated and that form described in detail, it will be readily apparent to those skilled in the art that various ~odiications may be made therein; without departing from the spirit of the invention or from the scope of the appended claimsO
AN ARRANG~MENT FOR MULTIPLE CUSTO~ CALLING
BACKGROUND OF THE INVENTION
(1) Field o~ the Invention:
The present invention pertains to mul~iple custom telephone calling features and more particularly to an arrangement for controlling these custom calling features which interface with one another in a common central o~fice.
(2~ Description of the Prior Art:
As computerization was introduced into telephone switching offices, it was understood that more complex functions could be provided by the switch-ing office. Among these functions are such features as special ticketing and billing arrangements and custom calling features such as three way calling, call forwarding, speed calling, and call waiting.
To implement each of these special custom calling features complex hardware in the ~orm of trunk circuits and complex programs in the central processing unit of the switching office are required.
When these custom calling ~eatures interface with one another further complexity is added to both the trunking arrangement and the programO Among these features the more complex are call waiting and three way calling. These features are the most complex since they require the greatest amount of hardware and program to handle their operation. Call waiting 63~
service is defined as: A call waiting subscriber will hear a short tone, if he is already using his line and the second party is attempting to reach him.
The second party receives normal ring back tone and the line is split, 50 -that only the subscriber to be called will hear the short tone. The tone will be repeated in 10 seconds as a reminder, and if un-answered, the second party will receive ring back tone. If the subscriber wants to end his first call he simply hangs up and his phone will ring with the second party on the line. If he wants to hold the first party while answering the second, he presses the hookswitch for one-half a second. With this method he can switch between parties at will.
Three way calling service is defined as:
A three way calling subscriber can add a third party to an existing conversation. While the subscriber is conversing with another party, a third party can be added to the conversation by depressing his hook-switch for one-half a second. This puts the original party on hold, and the subscriber will hear a special dial tone (3 spurts of tone followed by regular dial tone). He can then dial the third party and hold a private conversation with the third party. To establish the three way connection the subscriber must again depress its hookswitch for one-half a second. If the third party did not answer or if the subscriber wants to drop a third party from the three way call, he simply depresses his hookswitch for one-half a second and the original parties are re-established (and the subscriber may again establish a three way call~. To disconnect, the subscriber simply hangs up and all connections will be broken downO
These custom calling features required 3~ specialized trunk arrangements and complex program for the manipulation of the connection of parties in response to hookswitch flashing. Arrangements for connectirlg custom calling subscribers individually are shown in an article entitled "Custom Calling Services on No. 1 E~X" by J. D. McLean in the GTE
Automatic Ele~tric Technical Journal, July, 1976, Vol. 15 - No. 3. This article shows basic configu-rations for the establishment of call waiting andthree way calling custom features as independent calls. This article shows the special trunks and junctors which were developed for the implementation of these custom calling ~eatures. However, the article does not deal with the interconnection of these custom calling features to one another and the resulting complexity added b~ this arrangement.
One manner in which to handle the pro~lem of interacting custom calls is to prevent subscribers ~rom calling other subscribers who have active custom calling features~ This is not a suitable solution since certain subscribers would be unable to reach whomever they chose to call. Another solution is to provide complex trunks or to increase the logic of the controlling program to accommodate all the interactions of two interacting custom calls~ However this situation results in expensive trunk arrangements which are undesirable since they increase the cost of the custom calling feature to the subscriber.
The above mentioned problems are further compounded when both of the interacting custom calls are made from the same switching office. Thîs situa-tion means that one switching office must control the operation of multiple custom calls, making the interacting decisions very complex.
Accordingly it is the object of the present invention to provide a simple trunking arrangement and program ~or the operation of multiple interacting custom calls within a particular telephone swi~ching ofEice ~or a call waiting party who is not the con trolling party in a three way call to receive another incoming call.
i33 SUMMARY OF rrHE INV~NTION
The present invention comprises an arrange-ment for multiple custom calling telephone call~
within a switching of~ice. Three telephone subscribers are connected in a three way call via a switching network. A fourth telephone subscriber attempts to call a first custom calling subscriber. If the dialed custom calling subscriber has call waiting service and is not the controlling subscriber in the three way call, the call waiting feature of the dialed custom calling subscriber is activated. Since the original three way call and call waiting call interact, there is a multiple custom calling situation.
Each subscriber is connected via a line circuit to the switching network. One of the custom calling subscribers has established a three way call between himself, another custom calling subscriber and a POTS ~plain old telephone service) subscriber.
Each of these subscribers is connected via the switch-ing network to a three way call trunk. The calledcustom calling subscriber has the call waiting feature.
When the stored program detects a second POTS subscriber's attempt to dial the second custom calling subscriber, the second custom calling subscriber's line is Eound busy. However, since this second custom calling subscribe~ has call waiting service and is not the controlling party in the three way call, he can selectively connect to the new incoming call and the existing three way call. It should be noted that a custom calling subscriber may have only one custom calling feature active at any one time. In the example above, if the call ~aiting subscriber was also the controlling party in the three way call, the new incoming call would receive busy tone.
In order to connect the new incoming call to the second custom calling subscriber~ the second custom calling subscriber is temporarily disconnected from the three way call. The stored program of the CPU provides the necessary holding to this subscriber.
Simultaneously, a path is established under control of the program from the proper port of the three way call to a loop around trunk. In addition, the program establishes another path from the loop around trunk to the second custom calling subscriber~ Lastly, a connection is established via the switching network to the new incoming caller by the program.
As a result the two custom calling subscribers are separated by the loop around trunk. The hookswitch flashed of these subscribers can be simply and easily interpreted by the trunk circuit and stored program.
The two custom calls operate as though they were located in different central switchin~ offices.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram depicting the overall network structure of associated with the present invention.
Figure 2 is a block diagram depicting the originating and terminating time stages of the present invention and their connection to the central processing unit.
Figure 3A is a block diagram depicting an existing three way call between two custom callers with another subscriber attempting to call one oE
the custom calling subscribers.
Figure 3B iS a block diagram depicting the multiple custom calling network arrangement in accordance with the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Figure 1 is a block diagram showing a T-S-T
network of a digital switching center for switching a local to local telephone call between POTS subscribers.
Subscriber A is connected via an analog facility 3s interface unit (FIU) 10. The analog FIU 10 has a PCM voice connection to time switch and control unit (TCU) 0. Each TCU has 2 time s~ages associated with it, an originating time stage (OTS~ and a terminating time stage (TTS).
A connection is made from the OTS of a particular TCU to the 64 by 64 space switch 30. Then, a connection is established between the space swi~ch 30 and the terminating time stage of TCU 63, for example. Subscriber B is connected through analog FIU 20 to the TTS of TCU 63.
Next a voice transmission link is established form subscriber B to subscriber A. This communication link is established via FIU 20, the OTS of TCU 63, through space switch 30, through the TTS of TCU 0, through analog FIU 10 to subscriber A. As a result, a full talking path has been established between subscribers A and B.
Figure 2 shows the connection of a particular TCU to a corresponding microprocessor CPU 10. Each stage of a time and control unit includes an information memory and a control memoryO For example, the origi-nating time stage OTS shown includes an information memory 30 and a control memory 40. Microprocessor interface 20 connects the CPU 10 to the control memories 40 and 50.
The information memories 30 and 60 each contain information memory units with PCM samplesO
Up to four FIU's may be connected to each TCU. These FIU's may be analog line FIU's, connecting telephone subscribers to the network, as shown in figure 1 or analog trunk FIU's for connecting calls to service or outgoing trunk circuits.
ReEerring now to figure 3A, network 20 includes such elements as analog FIU's, time switch and control units, which further include information and control memories, and a space switching stage.
The configuration shown is that three subscribers B, C and ~ are connected in a three way call. Each of the subscribers A through D is connected to the switching network 10 via a line circuit 1 throuyh 4 respectively.
Subscriber B is shown to have call waiting service (CWT). Subscriber C is a three way calling subscriber (3WC), who initiated the three way call between subscriber B, D and himsel~. Subscribers A and D are plain old telephone service (POTS) subscribers.
Subscriber A is attempting to call subscriber B, a call waiting service subscriber. Subscriber B is already engaged as a called party in the three way call with subscribers C and D. Typically, subscriber A would receive a busy tone signal. Since subscriber B is a call waiting subscriber he will receive a tone signal indicating that subscriber A is attempting to call. Subscriber B is then able to manipulate his hookswitch to connect subscriber A.
As shown in figure 3B when the stored program of the CPU detects subscriber A's call to subscriber B, a reconfiguration is required~ The program must first determine that the called subscriber, B, has call waiting class oE service. Since subscriber B
is a call waiting custom caller and is engaged in an existing three way call, there is a multiple custom calling situation and special handling must occur.
The program must instruct the switching network 10 and three way call trunk 20 to disconnect subscriber B while providing the necessary hold in order to avoid dropping the call altogether. Next, the program selects a path from three way call trunk 20 through switching network 10 to loop around trunk 30. Simultaneously, a second path is es~ablished under program control from loop around trunk 30 through switching network 10 to subscriber B.
Lastly, a connection is established from subscriber A to subscriber B via switching network 10 under control of the program. As a result of ~he connection of loop around ~runk 30, the two cus~om calls (the three way call between subscribers BJ C
and D and the call waiting call between subscribers A, B and C) are isolated from one ano~her~ Now hookswitch ~9~633 flashes of subscriber B are interpreted by the CPU's program via sensors associated with each subscriber's line circuit and not forwarded through loop around trunk 30.
Since the hookswitch flashes of subscriber B are separated from those of subscriber C and vice versa, the basic logic design of all the system's trunks, such as the three way call trunk 20, are greatly simplified. This is contrasted with a sub-stantially more complex arrangement oE three way call trunk 20 required for handling multiple hookswitch flashes for both custom calling subscribers B and C.
The loop around trunk 30 makes the two custom calls appear as though they are in different switching centers connected by a trunk circuit. As a result, the control trunk logic is minimi~ed. In addition, the program logic required for outgoing custom calls and intra-office custom calls may be similar resulting in the great savings of pro~ram logic. The program logic saved via loop around this configuration is equivalent to approximately 1000 manhours of design development time.
It is to be noted that the complex situation of subscriber disconnects during multiple custo~ calls is handled as though only a single custom call was involved. This is a further xesult of the separation via loop around trunk 3~ of the two custom calls.
Although a preferred embodiment of the invention has been illustrated and that form described in detail, it will be readily apparent to those skilled in the art that various ~odiications may be made therein; without departing from the spirit of the invention or from the scope of the appended claimsO
Claims (9)
1. In a telephone switching office, an arrangement for multiple custom calling comprising:
a switching network;
a plurality of telephone subscribers connected to said switching network including at least a first and second custom calling subscriber and a third telephone subscriber engaged in an active three way telephone call;
means for detecting a request for a call waiting call from a fourth telephone subscriber to said first custom calling subscriber;
means for holding said connection of said first and second custom calling subscribers and said third telephone subscriber, said means for holding operated in response to said means for detecting;
means for temporarily disconnecting said first custom calling subscriber from said three way call;
first means for connecting said fourth subscriber to said first custom calling subscriber via said switching network, said call waiting call becoming an active telephone call; and second means for connecting telephone sub-scribers within the same switching office, said second means for connecting being connected to said first custom calling subscriber via said switching network and connected to said second custom calling subscriber via said switching network, said second means for connecting operated in response to said means for temporarily disconnecting to provide for connecting said first and said second custom calling subscribers while rendering said active three way call and said active call waiting call independently controlled.
a switching network;
a plurality of telephone subscribers connected to said switching network including at least a first and second custom calling subscriber and a third telephone subscriber engaged in an active three way telephone call;
means for detecting a request for a call waiting call from a fourth telephone subscriber to said first custom calling subscriber;
means for holding said connection of said first and second custom calling subscribers and said third telephone subscriber, said means for holding operated in response to said means for detecting;
means for temporarily disconnecting said first custom calling subscriber from said three way call;
first means for connecting said fourth subscriber to said first custom calling subscriber via said switching network, said call waiting call becoming an active telephone call; and second means for connecting telephone sub-scribers within the same switching office, said second means for connecting being connected to said first custom calling subscriber via said switching network and connected to said second custom calling subscriber via said switching network, said second means for connecting operated in response to said means for temporarily disconnecting to provide for connecting said first and said second custom calling subscribers while rendering said active three way call and said active call waiting call independently controlled.
2. An arrangement for multiple custom calling as claimed in claim 1, wherein said means for detecting includes:
means for sensing an incoming call to said first custom calling subscriber; and first program means for detecting that said first custom calling subscriber has call waiting service.
means for sensing an incoming call to said first custom calling subscriber; and first program means for detecting that said first custom calling subscriber has call waiting service.
3. An arrangement for multiple custom calling as claimed in claim 1, wherein said means for holding includes:
a three way call trunk; and second program means operated in response to said means for detecting to maintain said connection of said first and second custom calling subscribers with said third telephone subscriber while simultaneously allowing said third subscriber to be momentarily disconnected.
a three way call trunk; and second program means operated in response to said means for detecting to maintain said connection of said first and second custom calling subscribers with said third telephone subscriber while simultaneously allowing said third subscriber to be momentarily disconnected.
4. An arrangement for multiple custom calling as claimed in claim 1, wherein said first means for connecting includes:
a connection from said fourth telephone subscriber via said switching network to said first custom calling subscriber; and third program means operated in response to said means for temporarily disconnecting to establish said connection of said fourth subscriber to said first custom calling subscriber while simultaneously maintaining said connection of said first custom calling subscriber to said second custom calling subscriber and said third telephone subscriber.
a connection from said fourth telephone subscriber via said switching network to said first custom calling subscriber; and third program means operated in response to said means for temporarily disconnecting to establish said connection of said fourth subscriber to said first custom calling subscriber while simultaneously maintaining said connection of said first custom calling subscriber to said second custom calling subscriber and said third telephone subscriber.
5. An arrangement for multiple custom calling as claimed in claim 1, wherein said second means for connecting includes: a loop around trunk having output connections for connecting to said switching network and input the connections for con-necting to said same switching network.
6. An arrangement for multiple custom calling as claimed in claim 5, wherein said second means for connecting further includes:
a first connection from said first custom calling subscriber via said network to said loop around trunk;
a second connection from said loop around trunk to said means for holding via said switching network; and fourth program means operated in response to said means for temporarily disconnecting to establish said first and said second connections, whereby a talking path is re-established between said first custom calling subscriber, said second custom calling subscriber and said third telephone subscriber while simultaneously another independently controlled talking path is established between said first custom calling subscriber and said fourth telephone subscriber.
a first connection from said first custom calling subscriber via said network to said loop around trunk;
a second connection from said loop around trunk to said means for holding via said switching network; and fourth program means operated in response to said means for temporarily disconnecting to establish said first and said second connections, whereby a talking path is re-established between said first custom calling subscriber, said second custom calling subscriber and said third telephone subscriber while simultaneously another independently controlled talking path is established between said first custom calling subscriber and said fourth telephone subscriber.
7. An arrangement for multiple custom calling as claimed in claim 1, wherein said switching network comprises a digital switching network.
8. An arrangement for multiple custom calling as claimed in claim 7, wherein said digital switching network further comprises a time-space-time digital switching network.
9. An arrangement for multiple custom calling as claimed in claim 1, wherein said connection of each of said plurality of telephone subscribers includes a line circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31625481A | 1981-10-29 | 1981-10-29 | |
| US316,254 | 1981-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1190633A true CA1190633A (en) | 1985-07-16 |
Family
ID=23228251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000413621A Expired CA1190633A (en) | 1981-10-29 | 1982-10-18 | Arrangement for multiple custom calling |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5884564A (en) |
| BE (1) | BE894839A (en) |
| CA (1) | CA1190633A (en) |
| IT (1) | IT1153593B (en) |
-
1982
- 1982-10-18 CA CA000413621A patent/CA1190633A/en not_active Expired
- 1982-10-27 IT IT23952/82A patent/IT1153593B/en active
- 1982-10-28 JP JP57188272A patent/JPS5884564A/en active Pending
- 1982-10-28 BE BE2/59888A patent/BE894839A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5884564A (en) | 1983-05-20 |
| BE894839A (en) | 1983-02-14 |
| IT8223952A0 (en) | 1982-10-27 |
| IT1153593B (en) | 1987-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |