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US 5,204,857 AGranted
ATM exchange system
AssigneeKabushiki Kaisha Toshiba
InventorKeiichi Obara
Life of this patent
Estimating the term…
Abstract
An ATM exchange system capable of accommodation not only terminals of an ATM system but also terminals of an STM system at low cost. The ATM system includes an ATM channel switch for providing a direct exchange connection between the ATM terminal and an ATM trunk line, an STM channel switch for providing a direct exchange connection between the STM terminal and an STM trunk line, and an STM/ATM conversion module connected between the ATM channel switch and the STM channel switch and adapted to convert a call of one system to that of another system when a call is made between ATM terminal/line and STM terminal/line.
Claims8
An ATM exchange system in which STM terminals and STM trunk lines of an STM system and ATM terminals and ATM trunk lines of an ATM system are accommodated, comprising:
- an ATM channel switch for providing a direct exchange connection between an ATM terminal and an ATM trunk line;
- an STM channel switch for providing a direct exchange connection between an STM terminal and an STM trunk line;
- an STM/ATM conversion module disposed between the ATM channel switch and the STM channel switch, for converting a call of one system to that of another system when a call is made between an ATM terminal/line and an STM terminal/line;
- and
- call control means coupled to the ATM channel switch, the STM channel switch and the STM/ATM conversion module for controlling a call connection between a first ATM terminal, ATM trunk line, STM terminal or STM trunk line and a second ATM terminal, ATM trunk line, STM terminal or STM trunk line.
2 more elements
An ATM exchange system in which STM terminals and STM trunk lines of an STM system and ATM terminals and ATM trunk lines of an ATM system are accommodated, comprising:
- an ATM channel switch for providing a direct exchange connection between an ATM terminal and an ATM trunk line;
- an STM channel switch for providing a direct exchange connection between an STM terminal and an STM trunk line;
- STM/ATM conversion module disposed between the ATM channel switch and the STM channel switch, for converting a call of one system to that of another system when a call is made between an ATM terminal/line and an STM terminal/line;
- and
- call control means coupled to the ATM channel switch, the STM channel switch and the STM/ATM conversion module for controlling a call connection between a first ATM terminal, ATM trunk line, STM terminal or STM trunk line and a second ATM terminal, ATM trunk line, STM terminal or STM trunk line.
- wherein said call control means includes:
- detecting means for detecting a usage condition of the STM/ATM conversion modules when the call is made between an ATM terminal/line and an STM terminal/line, and
- control mans for effecting connection processing for connecting the ATM channel switch to the STM channel switch via the STM/ATM conversion module which is detected to be idle, and effecting busy processing if a busy state is detected.
5 more elements
An ATM exchange system comprising:
- an ATM channel switch for providing a direct exchange connection between ATM terminals and STM trunk lines;
- an STM channel switch for providing a direct exchange connection between STM terminals and STM trunk lines;
- STM/ATM conversion modules disposed between the ATM channel switch and the STM channel switch, for converting a call of a mutually different system and for connecting the ATM channel switch to the STM channel switch;
- and
- call control means coupled to the ATM channel switch, the STM channel switch and the STM/ATM conversion module for controlling a call connection between a first ATM terminal, ATM trunk line, STM terminal or STM trunk line and a second ATM terminal, ATM trunk line, STM terminal or STM trunk line;
- wherein said call control means detects a usage condition of the STM/ATM conversion modules when a call of a mutually different system is made, and controls connection processing via the STM/ATM conversion modules.
3 more elements
An ATM exchange system comprising:
- an ATM channel switch for providing a direct exchange between an ATM terminal and an ATM trunk line;
- an STM channel switch for providing a direct exchange connection between an STM terminal and an STM trunk line;
- a first group of STM/ATM conversion modules disposed between the ATM channel switch and the STM channel switch for exchanging a call of a mutually different system concerning a call of a first attribute and connecting the ATM channel switch to the STM channel switch;
- a second group of STM/ATM conversion modules disposed between the ATM channel switch and the STM channel switch for exchanging a call of a mutually different system concerning a call of a second attribute and connecting the ATM channel switch and the STM channel switch;
- and
- a call control unit for detecting a usage condition of the group of STM/ATM conversion modules corresponding to the attribute of a call when a call of a mutually different system is called, and controlling connection processing via an STM/ATM conversion module selected from a group of STM/ATM conversion modules corresponding to the attribute of that call.
3 more elements
An ATM exchange system comprising:
- an ATM channel switch for providing a direct exchange connection between ATM terminals and ATM trunk lines;
- an STM channel switch for providing a direct exchange connection between STM terminals and STM trunk lines, a tone generator connected to the STM channel switch, for generating various tone signals;
- an STM/ATM conversion module disposed between the ATM channel switch and the STM channel switch, for converting a call of a mutually different system and for connecting the ATM channel switch to the STM channel switch;
- and
- call control means coupled to the ATM channel switch, the STM channel switch and the STM/ATM conversion module for executing connection control of a call between a first ATM terminal, ATM trunk line, STM terminal, or STM trunk line and a second ATM terminal, ATM trunk line, STM terminal or STM trunk line by controlling the ATM channel switch, the STM channel switch, the tone generator, and the STM/ATM conversion module.
2 more elements
Dependencies are inferred from the claim text.