Optical relaying R-type and GR-type receiver system

• US 8,744,264 B2
• Filed: 04/08/2010
• Issued: 06/03/2014
• Est. Priority Date: 11/18/2009
• Status: Active Grant

• Current Assignee: Hyundai Infracore Company Limited
• Original Assignee: Hyundai Infracore Company Limited
• Inventors: Yang, Jong Suk
• Primary Examiner(s): Bello, Agustin
• Application Number:
  US13/258,752
• Publication Number:
  US 20120033977A1
• Time in Patent Office: 1,517 Days
• Field of Search: 398 66- 73, 398115-117
• US Class Current: 398/73
• CPC Class Codes: G08B 17/00 Fire alarms; Alarms responsive to explosion
• CPC Class Codes: G08B 25/009 Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
• CPC Class Codes: H04B 10/25 Arrangements specific to fibre transmission

Abstract

Some embodiments of R/GR type fire alarm control system according to the invention comprises a plurality of detectors/transmitters for issuing alarm signals, a plurality of fire safety equipments for operating under control signals, a plurality of optical repeaters and an R/GR type fire alarm control panel. The optical repeaters are connected to each other in daisy-chain and connected to the plurality of the detectors/transmitters and the fire safety equipments, optically transmits the alarm signals upwardly and optically transmits the control signals downwardly, and are capable of electrically transacting the alarm signals with respect to the detectors/transmitters and the control signals with respect to the fire safety equipments. The R/GR type fire alarm control panel receives the alarm signals from one of the optical repeaters and transmits the control signals to one of the optical repeaters.

Claims

1. An optical signal converter connecting multiple detectors/transmitters and an R/GR fire alarm control panel and connecting multiple fire safety equipments and the R/GR fire alarm control panel such that a plurality of optical signal converters including the optical signal converter be coupled in daisy-chain, the optical signal converter comprising:

an upstream signal path for electrically combining an electric signal, which is electrically converted from an optical signal optically received from a next optical signal converter connected in the daisy-chain, and an alarm signal, which is originated from at least one of the multiple detectors/transmitters, so as to output an optical signal optically converted from the electrically combined signal;

a downstream signal path for electrically converting an optical signal optically received from a previous optical signal converter connected in the daisy-chain into an electrically converted signal, and then for optically reconverting the electrically converted signal so as to output the optical signal to the next optical signal converter; and

an I/O port connected to the upstream signal path and providing the alarm signal received from the at least one of the multiple detectors/transmitters to the upstream signal path, the I/O port further connected to the downstream signal path and externally outputting the electrically converted signal from the downstream signal path to at least of the multiple fire safety equipments,

wherein the optical signal passing through the upstream signal path is eventually destined to the R/GR fire alarm control panel through the daisy-chain, and wherein the optical signal passing through the downstream signal path is originated from the R/GR fire alarm control panel,

wherein the upstream signal path comprises;

a first optical input port producing the electric signal electrically converted from the optical signal from the next optical signal converter connected in the daisy-chain;

an upstream branch connected to the first optical input port and combining the electric signal received from the first optical input port and the alarm signal originated from the at least one of the multiple detectors/transmitters, so as to produce the electrically combined signal; and

a first optical output port connected to the upstream branch and producing the optical signal optically converted from the electrically combined signal received from the upstream branch,

wherein the upstream branch comprises a packet encoder for producing the electrically combined signal when the electric signal from the first optical input port and the alarm signal from the at least one of the multiple detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal to the first optical output port,

wherein the downstream signal path comprises;

a second optical input port producing the electrically converted signal from the optical signal optically received from the previous optical signal converter connected in the daisy-chain;

a downstream branch connected to the second optical input port and forking the electrically converted signal received from the second optical input port to the I/O port and a second optical output port; and

the second optical output port connected to the downstream branch and optically converting the electrically converted signal received from the downstream branch to be output externally,

wherein the downstream branch comprises a detection circuit detecting a control signal in the electrically converted signal from the second optical input port to be transmitted to one of the multiple fire safety equipments, the detection circuit outputting the control signal to the I/O port,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

14. The optical signal converter of claim 1, wherein the multiple fire safety equipments comprise fire extinguishers or a smoke ventilation system.

15. The optical signal converter of claim 1, wherein the multiple detectors/transmitters comprise detectors for fire, smoke, heat, or gas, or push-button call points that are activated by a direct action of a person.

2. An optical signal repeater connecting multiple detectors/transmitters and an R/GR fire alarm control panel and connecting multiple fire safety equipments and the R/GR fire alarm control panel and with optical cables in daisy-chain, comprising:

an upstream signal path for electrically combining an electric signal, which is electrically converted from an optical signal optically received from a next optical signal repeater connected in the daisy-chain, and an alarm signal, which is originated from at least one of the multiple detectors/transmitters, so as to output an optical signal optically converted from the electrically combined signal;

a downstream signal path for electrically converting an optical signal optically received from a previous optical signal repeater connected in the daisy-chain into an electrically converted signal, and then for optically reconverting the electrically converted signal so as to output the optical signal to the next optical signal repeater; and

a repeating controller connected to the upstream signal path and an I/O port between the upstream signal path and the I/O port, and providing the alarm signal received from the I/O port to the upstream signal path, the repeating controller further connected to the downstream signal path between the downstream signal path and the I/O port, and extracting a control signal in the electric signal received from the downstream signal path to be transmitted to the I/O port,

wherein the I/O port provides the alarm signal received from the at least one of the multiple detectors/transmitters to the upstream signal path and externally outputs the control signal to corresponding fire safety equipments, and

wherein the optical signal passing through the upstream signal path is eventually destined to the R/GR fire alarm control panel through the daisy-chain, and wherein the optical signal passing through the downstream signal path is originated from the R/GR fire alarm control panel,

wherein the upstream signal path comprises;

a first optical input port producing the electric signal electrically converted from the optical signal received from the next optical signal repeater connected in the daisy-chain;

an upstream branch connected to the first optical port and combining the electric signal received from the first optical input port and the alarm signal originated from the at least one of the multiple detectors/transmitters, so as to produce the electrically combined signal; and

a first optical output port connected to the upstream branch and producing the optical signal optically converted from the electrically combined signal received from the upstream branch,

wherein the upstream branch comprises a packet encoder for producing the electrically combined signal when the electric signal from the first optical input port and the alarm signal from the detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal to the first optical output port,

wherein the downstream signal path comprises;

a second optical input port producing the electrically converted signal from the optical signal optically received from the previous optical signal repeater connected in the daisy-chain;

a downstream branch connected to the second optical input port and forking the electrically converted signal received from the second optical input port to the repeating controller and a second optical output port; and

the second optical output port connected to the downstream branch and optically converting the electrically converted signal received from the downstream branch to be output externally,

wherein the downstream branch comprises a detection circuit detecting a control signal in the electrically converted signal from the second optical input port to be transmitted to one of the multiple fire safety equipments, the detection circuit outputting the control signal to the repeating controller,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control Center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

3. An R/GR fire alarm control system comprising:

a plurality of detectors/transmitters for issuing alarm signals;

a plurality of fire safety equipments for operating under control signals;

a plurality of repeaters connected to the plurality of detectors/transmitters and the plurality of fire safety equipments;

a plurality of optical converters, connected to each other in daisy-chain, for optically transmitting the alarm signals upwardly and optically transmitting the control signals downwardly, and the plurality of optical converters being capable of electrically transacting the alarm signals and the control signals with respect to the plurality of the repeaters; and

an R/GR fire alarm control panel for receiving the alarm signals from one of the plurality of optical converters and for transmitting the control signals to one of the plurality of optical converters,

wherein each of the plurality of optical converters comprises;

an upstream signal path for electrically combining an electric signal, which is electrically converted from an optical signal optically received from a next optical converter connected in the daisy-chain, and an alarm signal, which is originated from at least one of the plurality of detectors/transmitters, so as to output an optical signal optically converted from the electrically combined signal to the R/GR fire alarm control panel;

a downstream signal path for electrically converting an optical signal optically received from a previous optical converter connected in the daisy-chain into an electrically converted signal, and then for optically reconverting the electrically converted signal so as to output the optical signal to the next optical converter; and

an I/O port connected to the upstream signal path and providing the alarm signal received from the at least one of the plurality of detectors/transmitters to the upstream signal path, the I/O port further connected to the downstream signal path and externally outputting the electrically converted signal received from the downstream signal path to at least one of the plurality of fire safety equipments,

wherein the upstream signal path comprises;

a first optical input port producing the electric signal electrically converted from the optical signal from the next optical converter connected in the daisy-chain;

an upstream branch connected to the first optical input port and combining the electric signal received from the first optical input port and the alarm signal originated from the at least one of the plurality of detectors/transmitters, so as to produce the electrically combined signal; and

a first optical output port connected to the upstream branch and producing the optical signal optically converted from the electrically combined signal from the upstream branch,

wherein the upstream branch comprises a packet encoder for producing the electrically combined signal when the electric signal from the first optical input port and the alarm signals from the plurality of detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal to the first optical output port,

wherein the downstream signal path comprises;

a second optical input port producing the electrically converted signal from the optical signal optically received from a previous optical converter connected in the daisy-chain;

a downstream branch connected to the second optical input port and forking the electrically converted signal received from the second optical input port to the I/O port and a second optical output port; and

the second optical output port connected to the downstream branch and optically converting the electrically converted signal received from the downstream branch to be output externally, and

wherein the downstream branch comprises a detection circuit for detecting a control signal in the electrically converted signal from the second optical input port to be transmitted to one of the fire safety equipments, the detection circuit outputting the control signal to the I/O port,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

4. The R/GR fire alarm control system of claim 3, further comprising:

a single port optical converter optically coupled to the one of the plurality of optical converters and electrically coupled to the R/GR fire alarm control panel.

5. An R/GR fire alarm control system comprising:

a plurality of detectors/transmitters for issuing alarm signals;

a plurality of fire safety equipments for operating under control signals;

a plurality of optical repeaters, connected to each other in daisy-chain and connected to the plurality of the detectors/transmitters and the plurality of fire safety equipments, the plurality of optical repeaters for optically transmitting the alarm signals upwardly and optically transmitting the control signals downwardly, and capable of electrically transacting the alarm signals with respect to the plurality of detectors/transmitters and the control signals with respect to the plurality of fire safety equipments; and

an R/GR fire alarm control panel for receiving the alarm signals from one of the plurality of optical repeaters and for transmitting the control signals to one of the plurality of optical repeaters,

wherein each of the plurality of optical repeaters comprises;

an upstream signal path for electrically combining an electric signal, which is electrically converted from an optical signal optically received from a next optical repeater connected in the daisy-chain, and an alarm signal, which is originated from at least one of the plurality of detectors/transmitters, so as to output an optical signal optically converted from the electrically combined signal to the R/GR fire alarm control panel;

a downstream signal path for electrically converting an optical signal optically received from a previous optical repeater connected in the daisy-chain into an electrically converted signal, and then for optically reconverting the electrically converted signal so as to output the optical signal to the next optical repeater; and

a repeating controller connected to the upstream signal path and an I/O port and providing the alarm signal received from the I/O port to the upstream signal path, the repeating controller further connected to the down stream signal path and extracting a control signal in the electric signal received from the downstream signal path to be transmitted to the I/O port,

wherein the I/O port provides the alarm signal received from the at least one of the multiple detectors/transmitters to the upstream signal path and externally outputs the control signal to a corresponding fire safety equipment, and

wherein the optical signal passing through the upstream signal path is eventually destined to the R/GR fire alarm control panel through the daisy-chain, and wherein the optical signal passing through the downstream signal path is originated from the R/GR fire alarm control panel,

wherein the upstream signal path comprises;

a first optical input port producing the electric signal electrically converted from the optical signal from the next optical signal repeater connected in the daisy-chain;

an upstream branch connected to the first optical input port and combining the electric signal received from the first optical input port and the alarm signal originated from the at least one of the plurality of detectors/transmitters, so as to produce the electrically combined signal; and

a first optical output port connected to the upstream branch and producing the optical signal optically converted from the electrically combined signal received from the upstream branch,

wherein the upstream branch comprises a packet encoder for producing the electrically combined signal when the electric signal from the first optical input port and the alarm signal from the detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal to the first optical output port,

wherein the downstream signal path comprises;

a second optical input port producing the electrically converted signal from the optical signal optically received from a previous optical repeater connected in the daisy-chain;

a downstream branch connected to the second optical input port and forking the electrically converted signal received from the second optical input port to the repeating controller and a second optical output port; and

the second optical output port connected to the downstream branch and optically converting the electrically converted signal received from the downstream branch to be output externally,

wherein the downstream branch comprises a detection circuit for detecting a control signal in the electrically converted signal from the second optical input port to be transmitted to one of the plurality of fire safety equipments, the detection circuit outputting the control signal to the repeating controller,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

6. The R/GR fire alarm control system of claim 5, further comprising:

a single port optical converter optically coupled to the one of the plurality of optical repeaters and electrically coupled to the R/GR fire alarm control panel.

7. A 3-way optical repeater, connecting multiple detectors/transmitters or multiple fire safety equipments and an R/GR fire alarm control panel with optical cables in daisy-chain, comprising:

an upstream signal path for optically receiving a first upstream signal, which is eventually destined to the R/GR fire alarm control panel, electrically converting the first upstream signal, electrically combining the converted first upstream signal with an alarm signal originated from at least one of the multiple detectors/transmitters to yield a second upstream signal, and optically outputting the second upstream signal;

a downstream signal path for optically receiving a first downstream signal, which originates from the R/GR fire alarm control panel and is eventually destined to at least one of the multiple fire safety equipments, electrically converting the first downstream signal, extracting a control signal for the at least one of the multiple fire safety equipments, and optically outputting the first downstream signal after the extraction; and

an optical I/O port for electrically converting an alarm signal, which originates from the multiple detectors/transmitters and is optically provided, to be provided to the upstream signal path, and for optically outputting the control signal extracted at the downstream signal path,

wherein the upstream signal path comprises;

a first optical input port producing a first upstream electric signal electrically converted from the first upstream signal, which is optically received from a next 3-way optical repeater connected in the daisy-chain;

an upstream branch connected to the first optical input port and combining the first upstream electric signal received from the first optical input port and the alarm signal originated from the at least one of the multiple detectors/transmitters, so as to produce a second upstream electric signal; and

a first optical output port connected to the upstream branch and producing the second upstream signal optically converted from the second upstream electric signal outputted from the upstream branch,

wherein the upstream branch comprises a packet encoder for producing the electrically combined signal when the first upstream electric signal from the first optical input port and the alarm signal from the at least one of the multiple detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal, as the second upstream electric signal, to the first optical output port,

wherein the downstream signal path comprises;

a second optical input port producing a electrical signal from the signal optically received from a previous 3-way optical repeater connected in the daisy-chain;

a downstream branch connected to the second optical input port and forking the electrical signal received from the second optical input port to the optical I/O port and a second optical output port; and

the second optical output port connected to the downstream branch and optically converting the electrical signal received from the downstream branch to be output externally,

wherein the downstream branch comprises a detection circuit detecting a control signal in the electrical signal from the second optical input port to be transmitted to one of the multiple fire safety equipments, and the detection circuit outputting the control signal to the optical I/O port,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

8. A 3-way optical repeater, connecting multiple detectors/transmitters or multiple fire safety equipments and an R/GR fire alarm control panel with optical cables in daisy-chain, comprising:

a first optical input port for optically receiving a first signal from a first 3-way optical repeater connected in the daisy-chain;

a first optical output port for optically outputting a second signal to a second 3-way optical repeater connected in the daisy-chain;

a second optical input port for optically receiving a third signal from the second 3-way optical repeater;

a second optical output port for optically outputting a fourth signal to the first 3-way optical repeater;

a third optical input port for optically receiving an alarm signal eventually destined to the R/GR fire alarm control panel;

a third optical output port for optically outputting a control signal eventually destined to one of the multiple fire safety equipments; and

a relaying part for electrically receiving the first signal and the alarm signal, which are optically received from the first optical input port and the third optical input port, respectively, and electrically converted, so as to electrically produce the second signal to be provided to the first optical output port, for electrically receiving the third signal, which is optically received from the second optical input port and is electrically converted, so as to extract the control signal from the third signal to provided to the third optical output port, and for producing the fourth signal, based on the third signal, to the second optical output port, so as to deliver the fourth signal to the first 3-way optical repeater,

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

an optical I/O port;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the optical I/O port, and the storage, and

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally.

9. An R/GR fire alarm control system comprising:

a plurality of detectors/transmitters for issuing alarm signals;

a plurality of fire safety equipments for operating under control signals;

a plurality of 3-way optical repeaters, connected to each other in daisy chain through optical cables, for optically transmitting the alarm signals upwardly and for optically transmitting the control signals downwardly;

a plurality of 2-way optical repeaters, connected to the respective 3-way optical repeater and connected to each other in the daisy-chain through the optical cables, among the plurality of detectors/transmitters or the plurality of fire safety equipments, for optically transmitting the alarm signals to a correspondingly connected 3-way optical repeater, and for optically transmitting the control signals to a correspondingly connected 3-way optical repeater; and

an R/GR fire alarm control panel for electrically or optically receiving the alarm signals from one of the plurality of 3-way optical repeaters and for electrically or optically transmitting the control signals to one of the plurality of 3-way optical repeaters,

wherein the plurality of 3-way optical repeaters, connecting the plurality of detectors/transmitters or the plurality of fire safety equipments and the R/GR fire alarm control panel with the optical cables in the daisy-chain, comprises;

a first optical input port for optically receiving a first signal from a first 3-way optical repeater connected in the daisy-chain;

a first optical output port for optically outputting a second signal to a second 3-way optical repeater connected in the daisy-chain;

a second optical input port for optically receiving a third signal from the second 3-way optical repeater;

a second optical output port for optically outputting a fourth signal to the first 3-way optical repeater;

a third optical input port for optically receiving an alarm signal eventually destined to the R/GR fire alarm control panel;

a third optical output port for optically outputting a control signal eventually destined to one of the multiple fire safety equipments; and

a relaying part for electrically receiving the first signal and the alarm signal, which are optically received from the first optical input port and the third optical input port, respectively, and electrically converted, so as to electrically produce the second signal to be provided to the first optical output port, for electrically receiving the third signal, which is optically received from the second optical input port and is electrically converted, so as to extract the control signal from the third signal to provided to the third optical output port, and for producing the fourth signal, based on the third signal, to the second optical output port, so as to deliver the fourth signal to the first 3-way optical repeater,

wherein each of the plurality of 2-way optical repeaters comprises an optical signal repeater connecting the plurality of detectors/transmitters or the plurality of fire safety equipments and the R/GR fire alarm control panel with the optical cables in the daisy-chain, the optical signal repeater comprising;

an upstream signal path for electrically combining an electric signal, which is electrically converted from an optical signal optically received from a next optical signal repeater connected in the daisy-chain, and an alarm signal, which is originated from at least one of the multiple detectors/transmitters, so as to output an optical signal optically converted from the electrically combined signal;

a downstream signal path for electrically converting an optical signal optically received from a previous optical signal repeater connected in the daisy-chain into an electrically converted signal, and then for optically reconverting the electrically converted signal so as to output the optical signal to the next optical signal repeater; and

a repeating controller for providing the alarm signal from an I/O port to the upstream signal path and for extracting a control signal in the electric signal from the downstream signal path to be transmitted to the I/O port,

wherein the repeating controller is connected to the I/O port, and the repeating controller is further connected to the upstream signal path and the downstream signal path,

wherein the I/O port provides the alarm signal received from the at least one of the multiple detectors/transmitters to the upstream signal path and externally outputs the control signal to a corresponding fire safety equipment, and

wherein the optical signal passing through the upstream signal path is eventually destined to the R/GR fire alarm control panel through the daisy-chain, and wherein the optical signal passing through the downstream signal path is originated from the R/GR fire alarm control panel,

wherein the upstream signal path comprises;

a first optical input port producing the electric signal electrically converted from the optical signal from the next optical signal repeater connected in the daisy-chain;

an upstream branch combining the electric signal from the first optical input port and the alarm signal originated from the at least one of the multiple detectors/transmitters, so as to produce the electrically combined signal; and

a first optical output port producing the optical signal optically converted from the electrically combined signal from the upstream branch,

wherein the upstream branch comprises a packet encoder for producing the electrically combined signal when the first upstream electric signal from the first optical input port and the alarm signal from the at least one of the multiple detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal to the first optical output port,

wherein the downstream signal path comprises;

a second optical input port producing the electrically converted signal from the optical signal optically received from the previous optical signal repeater connected in the daisy-chain; and

a downstream branch forking the electrically converted signal from the second optical input port to the repeating controller and a second optical output port; and

the second optical output port optically converting the electrically converted signal from the downstream branch to be output externally,

wherein the downstream branch comprises a detection circuit detecting a control signal in the electrically converted signal from the second optical input port to be transmitted to one of the multiple fire safety equipments, the detection circuit outputting the control signal to the repeating controller,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

10. The R/GR fire alarm control system of claim 9, further comprising:

a single port optical converter optically coupled to the one of the 3-way optical repeaters and electrically coupled to the R/GR fire alarm control panel.

11. An optical signal converter, connecting multiple detectors/transmitters or multiple fire safety equipments and an R/GR fire alarm control panel in daisy-chain using optical cables, the optical signal converter comprising:

a first optical module for receiving an upstream optical signal from a next optical signal converter connected in the daisy-chain to be converted into an upstream electric signal, for receiving a downstream electric signal to be converted into a downstream optical signal, and for outputting the downstream optical signal to the next optical signal converter;

a second optical module for receiving the downstream optical signal from a previous optical signal converter connected in the daisy-chain to be converted into the downstream electric signal, for receiving a combined upstream electric signal to be converted into a combined upstream optical signal, and for outputting the combined upstream optical signal to the previous optical signal converter;

an upstream branch for electrically combining the upstream electric signal from the first optical module and the alarm signal originated from the multiple detectors/transmitters, so as to produce the combined upstream electric signal; and

a downstream branch for providing the downstream electric signal from the second optical module to an I/O port and the first optical module,

wherein the I/O port provides the alarm signal received from the multiple detectors/transmitters to the upstream branch and for externally outputting the downstream electric signal,

wherein the upstream branch comprises a packet encoder for producing the combined upstream electric signal to be outputted as the combined upstream electric signal, when the upstream electric signal from the first optical module and the alarm signal from the multiple detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal, as the second upstream electric signal, to the first optical output port,

wherein the downstream branch comprises a detection circuit detecting a control signal in the downstream electric signal from the second optical module to be transmitted to one of the multiple fire safety equipments, the detection circuit outputting the control signal to the I/O port,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

12. An optical repeater, connecting multiple detectors/transmitters or multiple fire safety equipments and an R/GR fire alarm control panel in daisy-chain using optical cables, comprising:

a first optical module for receiving an upstream optical signal from a next optical repeater connected in the daisy-chain to be converted into an upstream electric signal, for receiving a downstream electric signal to be converted into a downstream optical signal, and for outputting the downstream optical signal to the next optical repeater;

a second optical module for receiving the downstream optical signal from a previous optical repeater connected in the daisy-chain to be converted into the downstream electric signal, for receiving a combined upstream electric signal to be converted into a combined upstream optical signal, and for outputting the combined upstream optical signal to the previous optical repeater;

an upstream branch for electrically combining the upstream electric signal from the first optical module and the alarm signal originated from the multiple detectors/transmitters, so as to produce the combined upstream electric signal;

a downstream branch for providing the downstream electric signal from the second optical module to a repeating controller and the first optical module; and

a repeating controller for providing the received alarm signal to the upstream branch, and for extracting a control signal from the downstream electric signal; and

an I/O port for providing the alarm signal received from the multiple detectors/transmitters to the repeating controller, and for externally outputting the control signal provided from the repeating controller,

wherein the upstream branch comprises a packet encoder for producing the combined upstream electric signal to be outputted as the combined upstream electric signal, when the upstream electric signal from the first optical module and the alarm signal from the multiple detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal, as the second upstream electric signal, to the first optical output port,

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally, and

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control center;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the storage, and the optical I/O port.

13. An optical repeater, connecting multiple detectors/transmitters or multiple fire safety equipments and an R/GR fire alarm control panel in daisy-chain using optical cables, comprising:

a first optical module for receiving an upstream optical signal from a next optical repeater connected in the daisy-chain to be converted into an upstream electric signal, for receiving a downstream electric signal to be converted into a downstream optical signal, and for outputting the downstream optical signal to the next optical repeater;

a second optical module for receiving the downstream optical signal from a previous optical repeater connected in the daisy-chain to be converted into the downstream electric signal, for receiving a combined upstream electric signal to be converted into a combined upstream optical signal, and for outputting the combined upstream optical signal to the previous optical repeater;

an upstream branch for electrically combining the upstream electric signal from the first optical module and the alarm signal originated from the multiple detectors/transmitters, so as to produce the combined upstream electric signal;

a downstream branch for providing the downstream electric signal from the second optical module to a repeating controller and the first optical module;

a repeating controller for providing the received alarm signal to the upstream branch, and for extracting a control signal from the downstream electric signal; and

a third optical module for optically receiving the alarm signal originated from the multiple detectors/transmitters, for electrically converting the alarm signal to be provided to the repeating controller, and for externally outputting the control signal provided from the repeating controller,

wherein the upstream branch comprises a packet encoder for producing the combined upstream electric signal to be outputted as the combined upstream electric signal, when the upstream electric signal from the first optical module and the alarm signal from the multiple detectors/transmitters arrive simultaneously, the packet encoder outputting the electrically combined signal, as the second upstream electric signal, to the first optical output port,

wherein the R/GR fire alarm control panel comprises;

an operation monitor monitoring whether signal lines connected to the R/GR alarm control panel are operational;

an indicator comprising a display, LED lamps, or speakers to visually or aurally indicate an alarm status or an operation status;

a network interface performing communications to and from a control Center;

an optical I/O port;

a storage storing operation information; and

a controller controlling the operation monitor, the indicator, the network interface, the optical I/O port, and the storage, and

wherein the I/O port comprises;

an input port for receiving a differential alarm signal satisfying RS422 specification or a DC 24 V alarm signal from the multiple detectors/transmitters, and for converting to a single-ended alarm signal to be provided to the upstream signal path; and

an output port for converting the electrically converted signal from the downstream signal path to a differential signal satisfying RS422 specification or a DC 24 V signal to be output externally.