Telecommunications system and method for connecting several CSTA clients to a PBX

1. A system for multiplexing a CSTA connection of a Communication System with a plurality of CSTA Clients, comprising:

a processor;

a plurality of communications ports; and

software enabling the processor and plurality of communications ports to:

support a first CSTA association between the processor and Communication System;

support one of a second-n th CSTA associations with each of the plurality of CSTA Clients; and

send, receive, and process messages associated with each of the second-n th CSTA associations and with the first CSTA association such that communications with the plurality of CSTA Clients are multiplexed over the first CSTA association between the processor and Communication System;

include a first list associated with a type of Invoke relating to Devices;

receive a Start Argument for the type of Invoke for a Device from one of the plurality of CSTA Clients;

if the Device has an associated element in the first list, send a Start Response for the type of Invoke to the one of the plurality of CSTA Clients, and if not, add an element associated to the Device to the first list, and send a Start Argument for the type of Invoke to the Communication System;

add the one of the plurality of CSTA Clients to the associated element in the first list;

receive a Stop Argument for the type of Invoke for a Device from one of the plurality of CSTA Clients;

send a Stop Response for the type of Invoke to the one of the plurality of CSTA Clients;

delete the one of the plurality of CSTA Clients from the associated element in the first list;

if no CSTA Client is associated with the element in the first list, delete the element from the first list and send a Stop Argument for the type of Invoke to the Communication System;

include a second list associated with non-processed Invokes;

include a third list associated with a type of Invoke relating to Devices;

add an InvokeID received with the Start Argument into to the second list, the InvokeID associated with the Device; and

if the Device does not have an associated element in the first list, add the InvokeID to the third list.

2. The system of claim 1 , wherein the software further enables the processor and plurality of communications ports to:

receive a Start Response relating to a Device from the Communication System;

locate the Device in the third list by the InvokeID; locate the associated element for the Device in first list;

update the associated element in the first list with a CrossReferenceID returned with the Start Response;

send the Start Response to the ones of the plurality of CSTA Clients associated with the element; and

erase the InvokeID from the second list and from the third list.

3. The system of claim 2 , wherein the software further enables the processor and plurality of communications ports to:

receive an Event Argument type of Invoke from the Communication System;

locate the associated element for the Device in the first list using the CrossReferenceID; and

send the Event Argument to the ones of the plurality of CSTA Clients associated with the element in the first list.

4. The system of claim 1 , wherein the software further enables the processor and plurality of communications ports to:

receive a Response Invoke from one of the plurality of CSTA Clients that is not included in specified list of Response Invoke types;

locate the associated one of the plurality of CSTA Clients in the second list and send the Response to this CSTA Client with the InvokeID; and

erase the InvokeID from the second list.

5. The system of claim 1 , wherein the software further enables the processor and plurality of communications ports to:

receive a type of Invoke from one of the plurality of CSTA Clients that is not included in specified list of Invoke types;

generate an InvokeID and add to the second list; and

send the Invoke and InvokeID to the Communication System.

6. A system for multiplexing a CSTA connection of a Communication System with a plurality of CSTA Clients, comprising:

a processor;

a plurality of communications ports; and

software enabling the processor and plurality of communications ports to:

support a first CSTA association between the processor and Communication System;

support one of a second-n th CSTA associations with each of the plurality of CSTA Clients; and

send, receive, and process messages associated with each of the second-n th CSTA associations and with the first CSTA association such that communications with the plurality of CSTA Clients are multiplexed over the first CSTA association between the processor and Communication System;

include a first list associated with a type of Invoke relating to Calls;

receive a Start Argument for the type of Invoke for a Call from one of the plurality of CSTA Clients;

if the Call has an associated element in the first list, send a Start Response for the type of Invoke to the one of the plurality of CSTA Clients, and if not, add an element associated to the Call to the first list, associate the one of the plurality of CSTA Clients to the element, and send a Start Argument for the type of Invoke to the Communication System;

add the one of the plurality of CSTA Clients to the associated element in the first list;

receive a Stop Argument for the type of Invoke for a Call from one of the plurality of CSTA Clients;

send a Stop Response for the type of Invoke to the one of the plurality of CSTA Clients;

delete the one of the plurality of CSTA Clients from the associated element in the first list;

if no CSTA Client is associated with the Call element in the first list, delete the element from the first list and send a Stop Argument for the type of Invoke to the Communication System;

include a second list associated with non-processed Invokes;

include a third list associated with a type of Invoke relating to Call;

add an InvokeID received with the Start Argument into to the second list, the InvokeID associated with the Call; and

if the Call does not have an associated element in the first list, add the InvokeID to the third list.

7. The system of claim 6 , wherein the software further enables the processor and plurality of communications ports to:

receive a Start Response relating to a Call from the Communication System; locate the Call in the third list by the InvokeID; locate the associated element for the Call in first list;

update the associated element in the first list with a CrossReferenceID returned with the Start Response;

based on the type of Invoke, either send the Start Response to the ones of the plurality of CSTA Clients associated with the element for the Call or send the Start Response to the one of the plurality of CSTA Clients associated with the InvokeID in the first list; and

erase the InvokeID from the second list and from the third list.

8. The system of claim 7 , wherein the software further enables the processor and plurality of communications ports to:

receive a DataCollected Argument type of Invoke from the Communication System;

locate the associated element for the Call in the first list using the CrossReferenceID; and

send the DataCollected Argument to the ones of the plurality of CSTA Clients associated with the element in the first list.

9. A system for multiplexing a CSTA connection of a Communication System with a plurality of CSTA Clients, comprising:

a processor;

a plurality of communications ports; and

software enabling the processor and plurality of communications ports to:

support a first CSTA association between the processor and Communication System;

support one of a second-n th CSTA associations with each of the plurality of CSTA Clients; and

send, receive, and process messages associated with each of the second-n th CSTA associations and with the first CSTA association such that communications with the plurality of CSTA Clients are multiplexed over the first CSTA association between the processor and Communication System;

include a first list associated with a type of Invoke relating to CallsDetailRecords;

receive a StartCallDetailRecords Transmission from one of the plurality of CSTA Clients;

if CallsDetailRecords exists, send saved Response to the one of the plurality of CSTA Clients, and if not, send a StartCallsDetailRecords Transmission to the Communication System;

add the one of the plurality of CSTA Clients to the first list;

receive a StopCallsDetailRecords Transmission for the type of Invoke for a Call from one of the plurality of CSTA Clients;

send a StopCallsDetailRecords Transmission Response for the type of Invoke to the one of the plurality of CSTA Clients;

delete the one of the plurality of CSTA Clients from the associated element in the first list;

if no CSTA Client is associated with the element in the Call, delete the element from the first list, send a StopCallsDetailRecords Transmission for the type of Invoke to the Communication System, and stop CallsDetailRecords;

include a second list associated with non-processed Invokes;

add an InvokeID received with the StartCallDetailRecords Transmission to the second list, the InvokeID associated with the Call;

receive a StartCallDetailRecords Transmission Response relating to a Device from the Communication System;

save the Response;

send the Start Response to the ones of the plurality of CSTA Clients associated with the element; and

delete the InvokeID from the second list.