Direct access arrangement device
First Claim
1. A direct access arrangement (DAA) device configured to interface a modem with a phone network, the DAA device comprising:
- a receive optical isolator (OI) module having a receive input side and a receive output side, the receive input side including a receive input line configured to receive a remote signal from the phone network, the receive output side including a receive output line configured to convey the remote signal to a modem;
a first and second transmit OI modules each having a transmit input side and a transmit output side, the transmit input sides having transmit input lines joined in parallel with one another and configured to receive transmit signals from the modem, the transmit output sides having transmit output lines joined in parallel with one another and configured to convey the transmit signals to the phone network; and
an impedance matching module joined to the transmit output sides of the first and second transmit OI modules and configured to provide impedance matching with the phone network.
3 Assignments
0 Petitions
Accused Products
Abstract
A direct access arrangement (DAA) device is provided that is configured to interface a security alarm modem with a phone network. The DAA device comprises a receive optical isolator (OI) module having a receive input side and a receive output side. The receive input side includes a receive input line configured to receive a remote signal from the phone network. The receive output side includes a receive output line configured to convey the remote signal to a security alarm modem. First and second transmit OI modules are provided that each have a transmit input side and a transmit output side. The transmit input sides have transmit input lines joined in parallel with one another and configured to receive transmit signals from the security alarm modem. The transmit output sides have transmit output lines joined in parallel with one another and configured to convey the transmit signals to the phone network. An impedance matching module is joined to the transmit output sides of the first and second transmit OI modules and configured to provide impedance matching with the phone network. Optionally, the transmit output lines from the first and second transmit OI modules may be joined in parallel with the receive input line. The first and second transmit OI modules may include first and second LEDs, respectively, that draw substantially equal diode currents. The receive and first and second transmit OI modules may each have an associated diode current, where the receive module is interconnected with the first and second transmit OI modules such that the diode current collectively utilized by the first and second transmit OI modules changes by an amount that is substantially equal in amplitude, but opposite in polarity, to the diode current utilized by the receive OI module.
154 Citations
29 Claims
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1. A direct access arrangement (DAA) device configured to interface a modem with a phone network, the DAA device comprising:
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a receive optical isolator (OI) module having a receive input side and a receive output side, the receive input side including a receive input line configured to receive a remote signal from the phone network, the receive output side including a receive output line configured to convey the remote signal to a modem;
a first and second transmit OI modules each having a transmit input side and a transmit output side, the transmit input sides having transmit input lines joined in parallel with one another and configured to receive transmit signals from the modem, the transmit output sides having transmit output lines joined in parallel with one another and configured to convey the transmit signals to the phone network; and
an impedance matching module joined to the transmit output sides of the first and second transmit OI modules and configured to provide impedance matching with the phone network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A data communications network enabled system configured to be joined to a phone network, the system, comprising:
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network enabled equipment configured to receive and transmit at least one of voice and data over a phone network;
a modem interconnecting the equipment with a phone network; and
a direct access arrangement (DAA) device provided between the modem and the phone network, the DAA device comprising;
a receive optical isolator (OI) module having a receive input side and a receive output side, the receive input side including a receive input line configured to receive a remote signal from the phone network, the receive output side including a receive output line configured to convey the received signal to the security alarm modem; and
first and second transmit OI modules each having a transmit input side and a transmit output side, the transmit input sides having transmit input lines joined in parallel with one another and configured to receive transmit signals from the modem, the transmit output sides having transmit output lines joined in parallel with one another and configured to convey the transmit signals to the phone network. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A direct access arrangement (DAA) device configured to interface a modem with a phone network, the DAA device comprising:
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a receive optical isolator (OI) module having a receive input side and a receive output side, the receive input side including a receive input line configured to receive a remote signal from the phone network, the receive output side including a receive output line configured to convey the remote signal to a modem;
a transmit OI module having a transmit input side and a transmit output side, the transmit input side having a transmit input line configured to receive transmit signals from the modem, the transmit output side having a transmit output line configured to convey the transmit signals to the phone network, the transmit output side of the transmit OI module being joined in parallel with the receive input side of the receive OI module; and
an impedance matching module joined to the transmit output side of the transmit OI module and configured to provide impedance matching with the phone network. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification