Regional centrex
First Claim
1. A telephone network system offering centrex services, the telephone network system comprising:
- a plurality of a telephone exchanges, a least one closed user group formed from subscribers connected to the exchanges so that one closed user group may be distributed as a subgroup to several different telephone exchanges, wherein a subscriber, within the closed user group, can call to a member of the same user group using a subnumber independent of an actual directory number, and the subscriber can make an external call from the closed user group by first dialing an out-line number; and
a subscriber database, the subscriber database being stored in each exchange with subscribers of the closed user group, the subscriber database being associated with this user group and containing all necessary data for implementing centrex services, whereby the call control of the exchange, having detected, based on the subscriber data that the subscriber belongs to the closed user group, utilizes the subscriber database when establishing a call, the subscriber database being a table.
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Accused Products
Abstract
In a regional telephone network system offering centrex services, a closed user group is distributed as subgroups to several different telephone exchanges. According to the invention, the management of user groups can be implemented in such a way that a table-type subscriber database is stored in each exchange with subscribers of at least one closed user group. The database is associated with this user group and contains all information necessary for implementing centrex services so that when the call control of the exchange detects on the basis of the subscriber data that the subscriber belongs to the closed user group, it utilizes the subscriber database when establishing a call.
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Citations
15 Claims
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1. A telephone network system offering centrex services, the telephone network system comprising:
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a plurality of a telephone exchanges, a least one closed user group formed from subscribers connected to the exchanges so that one closed user group may be distributed as a subgroup to several different telephone exchanges, wherein a subscriber, within the closed user group, can call to a member of the same user group using a subnumber independent of an actual directory number, and the subscriber can make an external call from the closed user group by first dialing an out-line number; and a subscriber database, the subscriber database being stored in each exchange with subscribers of the closed user group, the subscriber database being associated with this user group and containing all necessary data for implementing centrex services, whereby the call control of the exchange, having detected, based on the subscriber data that the subscriber belongs to the closed user group, utilizes the subscriber database when establishing a call, the subscriber database being a table. - View Dependent Claims (2, 3, 4, 5, 14, 15)
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6. A method for implementing centrex service in a telephone network system comprising a plurality of telephone exchanges, closed user groups being formed from subscribers connected to the exchanges so that at least one closed user group may be distributed as subgroups to several different telephone exchanges, whereby a subscriber can, within the closed user group, call to a member of the same group using a subnumber independent of a directory number, and the subscriber can make an external call from the closed user group by first dialing an out-line number, the method comprising:
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a subscriber database stored in each exchange with subscribers of the closed user group, the subscriber database being associated with the user group and containing all necessary data for implementing centrex services, the subscriber database being a table; and in setting up a call where at least one of the subscribers is a member of a user group connected to the exchange, the call control uses the subscriber database of the user group to perform the necessary number conversions and to connect the call. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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Specification