KR101772769B1 - Battery and OFD Device Integrated Customer Premises Equipment - Google Patents

Battery and OFD Device Integrated Customer Premises Equipment Download PDF

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Publication number
KR101772769B1
KR101772769B1 KR1020150168618A KR20150168618A KR101772769B1 KR 101772769 B1 KR101772769 B1 KR 101772769B1 KR 1020150168618 A KR1020150168618 A KR 1020150168618A KR 20150168618 A KR20150168618 A KR 20150168618A KR 101772769 B1 KR101772769 B1 KR 101772769B1
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South Korea
Prior art keywords
module
battery
optical cable
status
power
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KR1020150168618A
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Korean (ko)
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KR20170062883A (en
Inventor
신태삼
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주식회사 엘지유플러스
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0071—Provisions for the electrical-optical layer interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/20—Testing circuits or apparatus; Circuits or apparatus for detecting, indicating, or signalling faults or troubles
    • H04Q1/22—Automatic arrangements
    • H04Q1/24—Automatic arrangements for connection devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/28—Current-supply circuits or arrangements for selection equipment at exchanges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0066—Provisions for optical burst or packet networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects

Abstract

A battery and an optical cable splitter integrated optical splitter subscriber unit are disclosed. A battery and an optical cable splitter integrated unit according to the present invention includes a battery module for charging a predetermined power source from a power source supplied from the outside; An optical cable distribution module for re-connecting bundles of incoming optical cables and distributing them to individual optical cables; And the battery module and the optical cable distribution module, and provides a packet transmission service to the subscriber terminal through the optical cable distribution module, monitors the state of the incoming power source, and controls charging or discharging of the battery module according to the monitored power state. And a packet transmission module for monitoring the mounted state of the optical cable distribution module and the optical cable connection state and transmitting the monitored status information to the EMS (Element Management System).

Description

Battery and OFD Device Integrated Customer Premises Equipment < RTI ID = 0.0 >

The present invention relates to a fiber optic transceiver subscriber unit integrated with a battery and an optical cable distributor, and a battery and a fiber-optic cable distributor are integrated with a packet transmission device so as to integrally form a single unit, thereby efficiently utilizing a space inside a terminal box of a subscriber terminal, To a battery and an optical cable splitter integrated optical fiber subscriber unit capable of directly managing the state of a battery and an optical cable distributor.

The optical network of the telecommunication company is required to evolve the network that integrates the optical transmission network and the packet transmission network. For this reason, PTN (Packet Transport Network) and POTN (Packet Optical Transport Network) are emerging all over the world. The PTN is a generic name for a packet-based transmission technology applied to a technology that is transmitted through a conventional TDM (Time Division Multiplexing) method, and the POTN is a general term for a network in which an optical layer transmission technology is applied to the PTN.

The technology that integrates multiple network layers can reduce the capital expenditure (CAPEX) and multi-layer integrated control management, which can reduce operating expense (OPEX) and increase the efficiency of network bandwidth It is expected that the service quality and reliability can be improved.

Meanwhile, a subscriber unit incorporating a network means a small-capacity equipment installed in a subscriber unit or a subscriber area such as an enterprise customer, an apartment complex, etc., and includes an optical fiber distribution (OFD) device, a battery device for backup in case of power failure, And a subscriber-end transmission device.

However, since the general subscriber equipment is configured independently of the battery device and the optical cable distribution device, it is likely to be limited by space when installed in a narrow space in the subscriber terminal box, and the utilization of space is also inefficient.

In addition, the area where the subscriber equipment is installed is often inferior to the operating environment of the network operator in environmental conditions such as temperature and humidity. Since general subscriber equipment is composed of battery device and optical cable distribution device independently, There is a problem that packet transmission service of the network provider may be affected.

In addition, since the general subscriber equipment is configured independently of the battery device and the optical cable distribution device, the network provider must separately manage the battery device and the optical cable distribution device, which causes an increase in the management factor of the network operator .

Public Utility Model Publication No. 20-1998-059993 (Open date: 1998. 11. 05)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a packet transmission device and a packet transmission device, which are integrally formed by integrating a battery and an optical cable distributor, An object of the present invention is to provide a battery and an optical cable splitter integrated optical fiber subscriber unit which can directly manage the state of the battery and the optical cable distributor.

According to an aspect of the present invention, there is provided an integrated optical transmission terminal unit including a battery and an optical cable splitter, the module including: a battery module that charges a predetermined power source from a power source supplied from the outside; An optical cable distribution module for re-connecting bundles of incoming optical cables and distributing them to individual optical cables; And the battery module and the optical cable distribution module, and provides a packet transmission service to the subscriber terminal through the optical cable distribution module, monitors the state of the incoming power source, and controls charging or discharging of the battery module according to the monitored power state. And a packet transmission module for monitoring the mounted state of the optical cable distribution module and the optical cable connection state and transmitting the monitored status information to the EMS (Element Management System).

The above optical network terminal may further include a power module that supplies power to the respective components from outside. In this case, the packet transmission module receives status information including at least one of temperature, voltage, and current from the power module.

The optical network terminal may further include a battery mounting sensing unit for sensing whether the battery module is mounted.

The above optical network terminal may further include an OFD (Optical Fiber Distribution) mounting unit for detecting whether the optical cable distribution module is mounted.

Here, the packet transmission module monitors status information including at least one of a temperature, a voltage, a current, a charge capacity, and the number of charging / discharging of the battery module, and transmits a battery status report message to the EMS based on the monitored status information .

In addition, the battery module, the optical cable distribution module, the packet transmission module, and the power module are integrally formed in a housing having a size of width x length x height of (420 to 460) mm x (380 to 420) mm x (42 to 46) mm .

According to another aspect of the present invention, there is provided a packet transmission module for providing a packet transmission service to a subscriber station through a fiber-optic cable distributor, the packet transmission module being integrally formed with a battery and an optical cable distributor, A power state monitoring unit for monitoring a state of a power source; An optical cable status monitoring unit for monitoring the mounting state of the optical cable distribution module and the optical cable connection status; And a status information transmitting unit for transmitting status information monitored by the power status monitoring unit and status information monitored by the optical cable status monitoring unit to an EMS (Element Management System).

The packet transmission module may further include a charge / discharge control unit for controlling charging or discharging of the battery module according to a state of a power source monitored by the power state monitoring unit.

The packet transmission module may further include a power status receiver for receiving status information including at least one of temperature, voltage, and current from the power module. In this case, the power-status monitoring unit monitors the status of the power-on-incoming based on the status information received by the power-status receiving unit.

The packet transmission module may include: a battery condition monitoring unit for monitoring status information including at least one of a temperature, a voltage, a current, a charging capacity, and a number of charge / discharge cycles of the battery module; And a message transmission unit for transmitting a battery status report message to the EMS based on status information of the battery monitored by the battery status monitoring unit.

According to the present invention, the battery and the optical cable distributor are integrally formed by integrating with the optical transmission subscriber unit, thereby effectively utilizing the space inside the terminal box of the subscriber terminal such as the enterprise customer, the apartment complex, and the like.

In addition, according to the present invention, the battery and the optical cable distributor are integrally formed with the optical transmission subscriber unit, and the status of the battery and the optical cable distributor is directly monitored through the packet transmission module, It is possible to systematically manage the distributor.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view showing a configuration of a general subscriber terminal; FIG.
FIG. 2 is a view schematically showing a configuration of a subscriber terminal including a battery and an optical fiber subscriber unit integrated with an optical cable distributor according to an embodiment of the present invention. Referring to FIG.
FIG. 3 is a schematic view illustrating the configuration and functions of a battery and optical cable splitter integrated optical network terminal according to an exemplary embodiment of the present invention. Referring to FIG.
4 is a diagram for explaining the function of the optical cable distribution module.
5 is a diagram showing an example of battery state information monitoring.
6 is a view for explaining an example of detecting whether or not the battery module and the optical cable distribution module are mounted.
7 is a diagram schematically showing a configuration of a packet transmission module according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a detailed description will be made of a battery and optical cable splitter integrated optical fiber terminal unit and a packet transmission module according to an embodiment of the present invention with reference to the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view showing a configuration of a general subscriber terminal; FIG.

1, a battery 20, a fiber-optic cable distribution device 30, a packet transmission device 40, and a rectifier / power distribution device 50 are included in a terminal box 10 of a subscriber terminal such as an enterprise customer, an apartment complex, Are installed.

When the battery 20 is not supplied to the subscriber unit due to a power outage at the subscriber end zone, the battery 20 charges and supplies the spare power source so that the subscriber unit can operate normally. That is, when the power failure occurs in the area where the subscriber is located, the battery 20 supplies power to the subscriber station stably so as not to cause a disruption to the packet transmission service of the network provider. At this time, the capacity of the battery 20 is selected based on the statistical probability value. Here, the statistical probability value is an average value of the time from the occurrence of a power failure to a return in the domestic area. Generally, the probability value is designed based on the capacity of the system to operate normally during a power failure for 2 to 3 hours.

The optical cable distribution apparatus 30 reconnects the optical line bundle incoming from the network operator 60 and distributes the optical line bundle to individual optical lines. The individual optical lines distributed by the optical cable distribution apparatus 30 are connected to the packet transmission apparatus 40. Basically, it is possible to connect to the packet transmission device 40 only by using the optical cable distribution device 30 because the network provider 60 does not distribute the individual optical lines to the subscriber area, but distributes them in a bundle form. At this time, the optical distribution line distributed by the optical cable distribution apparatus 30 is selected based on the number of optical lines connected between the subscriber terminal 70 and the packet transmission apparatus 40.

The packet transmission apparatus 40 provides a packet transmission service to the subscriber terminal 70 as a master value for transferring a packet or an optical packet to the subscriber terminal 70.

The rectifier / power distribution device 50 rectifies the AC power applied from the outside, distributes the rectified power, and provides it to the packet transmission device 40.

However, since the battery 20 and the optical cable distribution device 30 are configured independently of each other, the subscriber equipment is liable to be limited by space when installed in a narrow space in the subscriber terminal box 10, There is a problem that utilization is also inefficient.

In addition, the area where the subscriber equipment is installed is often poor in environmental conditions such as temperature and humidity compared to the operating environment of the network operator. In the subscriber equipment, the battery 20 and the optical cable distribution unit 30 It is easy to be influenced by external environment requirements and only one of the battery 20 and the optical cable distribution device 30 may be influenced by the external environment requirement to affect the packet transmission service of the network provider 60 There is a problem.

Since the battery 20 and the optical cable distribution device 30 are independently configured in the subscriber equipment as described above, the network provider 60 separately manages the battery 20 and the optical cable distribution device 30 And this causes an increase in the management element of the network operator 60. [

FIG. 2 is a view schematically showing a configuration of a subscriber terminal including a battery and an optical fiber subscriber unit integrated with an optical cable distributor according to an embodiment of the present invention. Referring to FIG. Here, the same reference numerals are given to the same equipment as the general subscriber equipment shown in Fig.

Referring to FIG. 2, the optical network terminal 100 according to the embodiment of the present invention is connected to the rectifier / power distribution apparatus 50 in the terminal box 10 of the subscriber terminal. 3, the optical network terminal 100 may include a battery module 110, a fiber-optic distribution module 120, a packet transmission module 130, and a power module 140. At this time, the optical network terminal 100 is formed of a housing having dimensions of (width x height x height) of (420 to 460) mm x (380 to 420) mm x (42 to 46) mm, 110, the optical cable distribution module 120, and the packet transmission module 130 may be mounted and integrated.

The battery module 110 charges a predetermined power source from a power source supplied from the outside. That is, the battery module 110 receives the rectified and distributed power by the rectifier / power distribution device 50 and charges the predetermined power source. When the battery module 110 is not supplied to the subscriber terminal due to a power failure in the subscriber terminal area, the battery module 110 charges and supplies the standby power source so that the subscriber terminal can operate normally. That is, when the power failure occurs in the subscriber end area, the battery module 110 stably supplies power to the subscriber end so as not to cause a disruption in the packet transmission service of the network provider. At this time, the capacity of the battery module 110 can be selected on the basis of a statistical probability value as in the case of a general battery.

The optical cable distribution module 120 re-distributes the bundle of optical cables received from the network provider 60 and distributes the individual optical cables. 4, the optical cable distribution module 120 distributes the optical line bundle 122 from the network provider 60 to the optical line 120 connected between the subscriber terminal 70 and the packet transmission device 40, And is connected to the packet transmission module 130. The packet transmission module 130 is connected to the packet transmission module 130 through the optical line 124,

The packet transmission module 130 is integrally formed with the battery module 110 and the optical cable distribution module 120 and the housing. 1, the packet transmission module 130 not only provides a packet transmission service to the subscriber terminal 70 through the optical cable distribution module 120, but also provides a packet transmission service to the rectifier / power distribution device 50 and controls charging or discharging of the battery module 110 according to the state of the monitored power source. The packet transmission module 130 monitors the mounting state of the optical cable distribution module 120 and the connection state between the individual optical cables distributed by the optical cable distribution module 120 and transmits the monitored status information to the network provider 60 To an EMS (Element Management System) 80. The packet transmission module 130 monitors status information including at least one of the temperature, the voltage, the current, the charge capacity, and the number of charge / discharge cycles of the battery module 110, A report message can be transmitted. In this case, the EMS 80 stores information on the identification information, manufacturing date, and life of the battery module 110, and based on the battery status report message received from the packet transmission module 130, As described above, it is possible to provide the battery status information on the current state of the battery, the voltage, the average current, the remaining capacity, the remaining time, the number of times of use, The state information provided to the administrator by the EMS 80 is not limited to the battery module 110, and the state information of the packet The status information may be provided to the optical cable distribution module 120, the power module 140, and the like based on the status information report message received from the transmission module 130. In addition, the EMS 80 does not provide status information to the administrator, but can provide status information to the administrator in various modified items.

As described above, in the optical network access terminal according to the embodiment of the present invention, the packet transmission module communicates with the EMS of the network operator to transmit the status information of the battery module and the optical cable distribution module to the EMS, So that the state can be quickly judged and managed directly.

The power module 140 supplies power to the respective components from the rectifier / power distribution device 50. In this case, the packet transmission module 130 may receive status information including at least one of temperature, voltage, and current from the power module 140 and may transmit power status information to the EMS 80 based on the received status information. 140 may transmit a status information report message.

6, the packet transmission apparatus 100 may further include a battery mounting sensing unit 112 and an OFD mounting sensing unit 122. [ In this case, it is preferable that the battery module 110 and the optical cable distribution module 120 are detachably mounted to the packet transmission device 100, respectively. At this time, the battery mounting sensing unit 112 senses whether the battery module 110 is mounted, and transmits the sensed result to the packet transmission module 130. In addition, the OFD mounting detection unit 122 detects whether the optical cable distribution module 120 is mounted, and transmits the detected result to the packet transmission module 130.

1, when the battery 20 exists externally to the packet transfer apparatus 40, the battery 20 can supply power to the packet transfer apparatus 40 only at the time of a power failure in the subscriber end zone have. However, when the battery module 110 is integrally installed in the optical transmission terminal unit 100 as in the embodiment of the present invention, the packet transmission module 130 receives the power module status signal from the power module 140, Even when an abnormality occurs in the power module 140 through the internal power module status signal, the power can be controlled by controlling the battery module 110. That is, when the power module status signal received from the power module 140 is out of the set range, the packet transmission module 130 can control power to be supplied by the battery module 110. [

1, when the battery 20, the optical cable distribution device 30, the packet transmission device 40, and the rectifier / power distribution device 50 are individually installed, Shielding filters must be applied separately to block the entry of the same foreign object. However, when the battery and the optical cable distributor are integrally implemented in the optical transmission subscriber unit 100 as in the embodiment of the present invention, only the optical transmission subscriber unit 100 is provided with the shielding filter It is possible to reduce the manufacturing cost of the equipment.

7 is a diagram schematically showing a configuration of a packet transmission module according to an embodiment of the present invention. Here, the packet transmission module may be used as the packet transmission module 130 shown in FIG. 3, and therefore, the same reference numerals are given thereto.

7, a packet transmission module 130 according to an embodiment of the present invention includes a power state monitoring unit 131, an optical cable state monitoring unit 132, a state information transmitting unit 133, a charge and discharge control unit 134, A power status receiving unit 135, a battery status monitoring unit 136, and a message transmitting unit 137.

The power status monitoring unit 131 monitors the status of the power supplied from the rectifier / power distributor 50. That is, the power status monitoring unit 131 monitors the status of the power source that is rectified and distributed by the rectifier / power distribution apparatus 50 and is introduced into the packet transmission apparatus 100.

The optical cable status monitoring unit 132 monitors the mounting state of the optical cable distribution module 120 and the optical cable connection state. That is, the optical cable status monitoring unit 132 monitors whether or not the optical cable distribution module 120 is disconnected from the packet transmission device 100 and the optical cable connection status between the optical cable distribution module 120 and the packet transmission device 100 do. The optical cable status monitoring unit 132 can detect whether the optical cable distribution module 120 is mounted in the packet transmission device 100 through the OFD mounting detection unit 122 and can detect whether the optical transmission / It is possible to monitor whether or not the fiber-optic cable connection between the fiber-optic distribution module 120 and the packet transmission device 100 is normally established corresponding to each of the subscriber terminals 70 connected thereto.

The status information transmitting unit 133 transmits status information monitored by the power status monitoring unit 131 and status information monitored by the optical cable status monitoring unit 132 to an EMS (Element Management System) That is, the status information transmission unit 133 receives information on the status of the power source monitored by the power status monitoring unit 131, the mounting status of the optical cable distribution module 120 monitored by the optical cable status monitoring unit 132, And transmits information on the connection status to the EMS 80. [ Accordingly, the packet transmission module 130 according to the embodiment of the present invention transmits the status of the battery module 110 and the optical cable distribution module 120, which are integrally formed in the housing, to the EMS 80 in real time, So that the management of the transmission apparatus 100 can be facilitated.

The charge / discharge control unit 134 controls charging or discharging of the battery module 110 according to the state of the power source monitored by the power state monitoring unit 131. For example, when the state of the power monitored by the power state monitoring unit 131 falls below a set value, the charge / discharge control unit 134 controls the discharging of the battery module 110 and outputs Power can be controlled to be supplied. At this time, the charge / discharge control unit 134 may control the battery module 110 to supply power to the packet transfer device 100 by a value insufficient for the set value.

The power status receiving unit 135 may receive status information including at least one of temperature, voltage, and current from the power module 140. That is, the power status receiving unit 135 may receive status information including at least one of temperature, voltage, and current for the power source that is currently being input from the power module 140. In this case, the power state monitoring unit 131 determines the state information received by the power state receiving unit 135 as the state of the power source drawn from the rectifier / power distributor 50 and monitors the state information.

The battery condition monitoring unit 136 monitors status information including at least one of the temperature, the voltage, the current, the charge capacity, and the number of charge / discharge cycles of the battery module 110. That is, the battery condition monitoring unit 136 can use the current temperature, the voltage, the current, the currently charged capacity of the battery module 110, the number of times the battery module 110 has been charged and discharged, and the capacity charged in the battery module 110 The state information on the time and the like can be monitored.

The message transmission unit 137 transmits a battery status report message to the EMS 80 based on the status information of the battery module 110 monitored by the battery status monitoring unit 136. [ That is, the message transmission unit 137 reports the state of the battery module 110 monitored by the battery state monitoring unit 136 to the EMS 80. Although the message transferring unit 137 reports and reports the status of the battery module 110 to the EMS 80 independently of the status information transferring unit 133, The status of the battery module 110 may be reported to the EMS 80 through the unit 133.

Claims (12)

A battery module for charging a predetermined power source from an external power source;
An optical cable distribution module for re-connecting bundles of incoming optical cables and distributing them to individual optical cables; And
A packet transmission service is provided to the subscriber terminal through the optical cable distribution module, the status monitoring unit monitors the status of the power source and monitors the charging status of the battery module according to the status of the monitored power source. A packet transmission module for controlling the mounting state of the optical cable distribution module and the optical cable connection state and for transmitting monitored status information to an EMS (Element Management System);
And an optical fiber splitter for splitting the optical signal into optical signals. The method according to claim 1,
A power supply module for supplying power to each component from an external power source;
Further comprising:
Wherein the packet transmission module receives state information including at least one of temperature, voltage, and current from the power module. The method according to claim 1,
A battery mounting sensing unit for sensing whether the battery module is mounted;
Further comprising a battery and an optical cable splitter integrated with each other. The method according to claim 1,
An optical fiber distribution (OFD) mounting sensing unit for sensing whether the optical cable distribution module is mounted;
Further comprising a battery and an optical cable splitter integrated with each other. The method according to claim 1,
Wherein the packet transmission module comprises:
Monitoring status information including at least one of a temperature, a voltage, a current, a charge capacity, and the number of charge / discharge cycles of the battery module, and transmitting a battery status report message to the EMS based on monitored status information. Battery and optical cable distributor. 3. The method of claim 2,
Wherein the battery module, the optical cable distribution module, the packet transmission module, and the power module are integrally formed in a housing having a width x height x height of (420 to 460) mm x (380 to 420) mm x (42 to 46) mm And the optical fiber splitter is integrated with the optical fiber splitter. 3. The method of claim 2,
Wherein the packet transmission module comprises:
Wherein the control unit receives power module status signals from the power module and controls power to be supplied by the battery module when an abnormal state of the power module is detected based on the received power module status signal. Fiber - optic splitter integrated optical fiber subscriber unit. 3. The method of claim 2,
And a shielding filter for integrating the battery module, the optical cable distribution module, the packet transmission module, and the power module to block the entry of foreign matter is applied to the optical fiber splitter. A subscriber terminal packet transmission module formed integrally with the battery module and the optical cable distribution module and providing a packet transmission service to the subscriber terminal through the optical cable distribution module,
A power status monitoring unit for monitoring a status of an incoming power source;
An optical cable state monitoring unit monitoring the mounted state of the optical cable distribution module and the optical cable connection state; And
A status information transmission unit for transmitting status information monitored by the power status monitoring unit and status information monitored by the optical cable status monitoring unit to an EMS;
And a subscriber-end packet transmission module. 10. The method of claim 9,
A charge / discharge control unit for controlling charging or discharging of the battery module according to a state of a power source monitored by the power state monitoring unit;
And a subscriber-end packet transmission module. 10. The method of claim 9,
A power status receiving unit for receiving status information including at least one of temperature, voltage, and current from the power module;
Further comprising:
Wherein the power status monitoring unit monitors a status of a power source based on status information received by the power status receiving unit. 10. The method of claim 9,
A battery condition monitoring unit monitoring status information including at least one of a temperature, a voltage, a current, a charging capacity, and a number of charge / discharge cycles of the battery module; And
A message transmission unit for transmitting a battery status report message to the EMS based on status information of the battery monitored by the battery status monitoring unit;
Further comprising a subscriber-end packet transmission module.
KR1020150168618A 2015-11-30 2015-11-30 Battery and OFD Device Integrated Customer Premises Equipment KR101772769B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001224068A (en) * 2000-02-09 2001-08-17 Nec Shizuoka Ltd Communication equipment and its communication method
KR100834705B1 (en) * 2007-03-08 2008-06-10 에스케이 텔레콤주식회사 Apparatus and method for managing of line number sheet for mobile communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001224068A (en) * 2000-02-09 2001-08-17 Nec Shizuoka Ltd Communication equipment and its communication method
KR100834705B1 (en) * 2007-03-08 2008-06-10 에스케이 텔레콤주식회사 Apparatus and method for managing of line number sheet for mobile communication system

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