Call control system for a subscriber transmission device
First Claim
1. A call control system for use in a subscriber transmission device located along a transmission path between subscribers and exchanges for performing upon requests from the exchanges, connection and disconnection of the subscribers with the transmission path, the call control system comprising:
- plural call control message terminal sections, each provided for one of different protocols, each supported by one of groups of exchanges, for terminating a data link for sending and receiving a call control message to and from a corresponding exchange; and
a call change data processor for detecting call and clearance by a subscriber, and for requesting one of the plural call control message terminal sections, which is provided for a protocol supported by a group of exchanges to one of which the subscriber is connected, to transmit detected contents of the call and clearance to the corresponding exchange.
1 Assignment
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Accused Products
Abstract
A call control system can cope with a plurality of exchanges that support call control messages issued in accordance with different protocols. The call control system for use in a subscriber transmission device is located along a transmission path between a plurality of subscribers and a plurality of exchanges. The call control system includes call control message terminal sections, each of which is provided for each of the protocols that are supported by the exchanges for terminating a data link for sending and receiving a call control message to and from a corresponding exchange. A call change data processor is provided in the system for detecting a call and a clearance by a subscriber, and for requesting the call control message terminal section, which supports a protocol that corresponds to a protocol of an exchange to which is connected to the subscriber, to transmit the detected contents to the exchange that supports the protocol.
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Citations
25 Claims
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1. A call control system for use in a subscriber transmission device located along a transmission path between subscribers and exchanges for performing upon requests from the exchanges, connection and disconnection of the subscribers with the transmission path, the call control system comprising:
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plural call control message terminal sections, each provided for one of different protocols, each supported by one of groups of exchanges, for terminating a data link for sending and receiving a call control message to and from a corresponding exchange; and a call change data processor for detecting call and clearance by a subscriber, and for requesting one of the plural call control message terminal sections, which is provided for a protocol supported by a group of exchanges to one of which the subscriber is connected, to transmit detected contents of the call and clearance to the corresponding exchange. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification