Method for setting up a telephone connection and an exchange sys

Details Method for setting up a telephone connection and an exchange sys Method for setting up a telephone connection and an exchange sys

1997-11-04

2000-07-04

Smith, Creighton

Telephonic communications

Centralized switching system

Call distribution to operator

379265, H04M 300

Patent

active

060849576

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to a method for setting up a telephone connection in a telephone system when the telephone system comprises several exchange systems, which exchanges are connected to one or more other exchanges, to one or more subscriber terminal equipments and to work stations of one or more operators.
The present invention also relates to an exchange system comprising an exchange, one or more operators, one or more work stations and one or more subscriber terminal equipments with a connection to the exchange.
The telephone system comprises exchange systems including subscriber terminal equipments and one or more operators. The operator often uses a server containing statistical data on the calls already made and information connected to call orders made in advance.
Any subscriber (subscriber A) can make a call order, that is, order a call in advance from a server in order to contact another subscriber (subscriber B). At the ordered time, the operator calls both subscriber A and subscriber B and after having reached them both, establishes a connection between them. When the exchange is realized with an automatic DX 200 exchange, for example, local calls can be executed easily. But long-distance calls may be problematic at peak times as there are only a few connections between the exchanges when compared with the number of subscribers connected to the exchanges. The situation is like this at exchanges that handle telephone connections to an oil field, for example, which exchange may include as many as millions of subscribers but from which there are only some tens of outgoing connections. In that case, the operator has to attend to the setting-up of both direct and ordered long-distance calls.
It is difficult to set up a call during peak time as the operator has to check by trying again and again at short intervals if a connection has become free so that the ordered call could be put through. It is very frustrating to try again constantly. The operator cannot know when a connection is free and he/she can lose many possibilities before being successful. Further, operators at different exchanges will very easily start competing for the same connections as incoming and outgoing calls both use the same connections.
The object of the present invention is to accomplish an exchange system in which an operator need not try repeatedly to put a call through without knowing when a free connection is available.
This is achieved with the method shown in the preamble that is characterized in that in the method a specified queuing list is used, which list is maintained in such a manner that when no free connection is available, the operator places information about the received call order in the queuing list to wait for a connection to become free; and that in the method the loading of the connections is monitored, and when the required connection is detected to be free, said connection is reserved for the use of the operator and the operator is sent information about the call order waiting on the queuing list.
The exchange system according to the invention is characterized in that the exchange system comprises means for maintaining a queuing list on which information about the call order is placed to wait for a connection to become free when no free connection is available; means for monitoring the loading of the connections and for detecting a free connection, means for reserving said free connection to the use of the operator; and means for sending information to the operator about the call order on the queuing list when a free connection is available.
Considerable advantages are achieved with the invention. The queuing for free connections connected to the setting-up of calls becomes automatic and at the same time the competition between the operators for free connections will cease. In the method according to the invention, a connection that has become free is automatically reserved for the use of the operator for setting up a connection. When the operator has to attend to a great number of calls in a

REFERENCES:
patent: 4991203 (1991-02-01), Kakizawa
patent: 5040208 (1991-08-01), Jolissaint
patent: 5155761 (1992-10-01), Hammond
patent: 5311574 (1994-05-01), Livanos
patent: 5444774 (1995-08-01), Friedes

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