1373955 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明涉及網路通訊， 電話之方法。 1101 年 尤其涉及一種網路裝置及其重撥 【先前技術】 [0002] 一般而言，閘道器等局端银壯β 啼網路裝置所提供之資源沒有區 分普通通話資源與緊急私資源，例如，若局端網路裝 置所提供之通話„包括128個賴頻道麻128個通 話頻道將全部被提供給普通用戶使用，若已有128個用戶 使用電話，則第129個用戶將無法拇出電話。 [_熱:，若用戶遇到緊急狀況須撥打救援電話(如ii。、ii9 )時，因通話資源不夠（如128個通話頻道已滿）將無法 使用電話。故’急需—種網路裝置可以在有限的通話資 源下保障用戶能撥出緊急電話。 【發明内容】 有鑒於此，需提供一種網路裝置，可在有限的通話資源 下保障用戶能撥出緊急電話。 此外，還需提供一種網路裝置重撥電話之方法，可在有 限的通話資源下保障用戶能撥出緊.½電話。 一種網路裝置，通訊連接複數终端電話機與本地交換機 ’其提供普通通話資源與緊急通話資源β網路裝置包括 储存模組、控制模組及數位訊號處理模組。儲存模組用 於儲存複數緊急電話號碼。控制模組用於從终端電話機 偵測公眾交換電話網路撥號’並當偵測到公眾交換電話 [0004] [0005] [0006] 09712931#單編號 Α0101 第4頁/共17頁 1013159671-0 1373955 101年.04月26日接正替^頁 網路撥號^丨％普通通話資源是否用完。數位訊號處理 模組用於當普通通話資源已用完時從终端電話機接收公 眾交換電話網路電話_，並判斷絲交換電話網路電 話號瑪是㈣配料緊急電話號碼，以及當公眾交換電 話網路電話號如配鮮緊急電話號碼時將公眾交換電 話網路電話料藉由緊急通話資源重撥至本地交換機。 控制模組還用於當普通通話資源已用完時連接終端電話 機與數位贱處理触，及當絲交換電話網路電話號 瑪匹配該«急電域碼時連接數位峨處理模組與本 地交換機。 [0007] 一種網路裝置重撥電話之方法，網路裝置通訊連接複數 終端電話機與本地交換機，網路裝置提供普通通話資源 與緊急通話資源，網路裝置重撥電話之方法包括以下步 驟：提供數位訊號處理模組與複數緊急電話號碼；從終 端電話機偵測公眾交換電話網路撥號；當偵測到公眾交 換電話網路撥號時，判斷普通通話資源是否用完；若普 通通話資源已用完，則連接終端電話機與數位訊號處理 模組；數位訊號處理模組從終端電話機接收公眾交換電 話網路電話號碼；數位訊號處理模組判斷公眾交換電話 網路電話號碼是否匹配該等緊急電話號碼；若公眾交換 電話網路電話號碼匹配該等緊急電話號碼，則連接數位 訊號處理模組與本地交換機；及數位訊號處理模組藉由 緊急通話資源重撥公眾交換電話網路電話號碼至本地交 換機。 [0008] ώ .、， 曰田Μ下對具體實施方式詳細的描述並結合附 09712931#單編號 Α〇101 圖，將可 第5頁/共17頁 1013159671-0 [ϊόι年0^i~^6日孩正钥^頁 輕易的瞭解上述内容及此項發明之技術效果。 【實施方式】 [⑽09]參閱圖1，為本發明網路裝置20之實施環境及一實施方式 之模組圖。在本實施方式中，網路裝置20可為局端閘道 器（Gateway)，通訊連接複數终端電話機10與本地交 換機（Local Exchange) 30，用於將來自終端電話機 10之公眾交換電話網路（Public Switch Telephone1373955 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a method of network communication and telephone. In particular, 1101 relates to a network device and its redialing [Prior Art] [0002] Generally, resources provided by a central office such as a gateway device do not distinguish between ordinary call resources and emergency private resources. For example, if the call provided by the central office network device includes 128 channels, 128 channels are all provided to the general user, and if 128 users use the phone, the 129th user will not be able to get out. [_热: If the user needs to make a rescue call (such as ii., ii9) in case of emergency, the call will not be available due to insufficient call resources (such as 128 call channels are full). The device can ensure that the user can make an emergency call under the limited call resources. [Invention] In view of this, it is necessary to provide a network device that can ensure that the user can make an emergency call with limited call resources. It is necessary to provide a method for re-dialing a telephone by a network device, which can ensure that the user can dial out a tight telephone with limited call resources. A network device that communicates with a plurality of terminal telephones The local switch 'provides common call resources and emergency call resources. The beta network device includes a storage module, a control module and a digital signal processing module. The storage module is used to store a plurality of emergency telephone numbers. The control module is used for the slave terminal telephone. Detecting public switched telephone network dialing' and when detecting public switched telephones [0004] [0005] [0006] 09712931#单号Α0101 Page 4 of 17 pages 1031596771-0 1373955 101 years. April 26th Is the ^page network dialing ^丨% normal call resources are used up. The digital signal processing module is used to receive the public switched telephone network telephone from the terminal telephone when the normal call resources have been used_, and judge the silk exchange telephone network The telephone number is the (4) ingredient emergency telephone number, and when the public exchanges the telephone network telephone number, such as the fresh emergency telephone number, the public switched telephone network telephone material is redeployed to the local exchange by the emergency call resource. Used to connect the terminal telephone with the digital processing touch when the normal call resources have been used up, and when the wire exchange telephone network telephone number is matched with the «emergency area When the network device is connected to the processing module and the local switch [0007] A method for re-dialing a telephone by a network device, the network device is connected to a plurality of terminal telephones and a local exchange, and the network device provides common call resources and emergency call resources, and the network The method for redialing a device includes the steps of: providing a digital signal processing module and a plurality of emergency telephone numbers; detecting a public switched telephone network dialing from the terminal telephone; and determining an ordinary calling resource when detecting a public switched telephone network dialing. Whether it is used up; if the normal call resources have been used up, the terminal telephone and the digital signal processing module are connected; the digital signal processing module receives the public switched telephone network telephone number from the terminal telephone; and the digital signal processing module judges the public switched telephone network. Whether the telephone number of the road matches the emergency telephone number; if the public switched telephone network telephone number matches the emergency telephone number, the digital signal processing module and the local exchange are connected; and the digital signal processing module redials by the emergency call resource Public exchange telephone network phone number to Local exchange. [0008] ώ ., , 曰 Μ 对 对 对 对 对 对 对 对 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 097 On the 6th, the child's key page can easily understand the above contents and the technical effects of the invention. [Embodiment] [(10)09] Referring to Fig. 1, a block diagram of an implementation environment and an embodiment of a network device 20 of the present invention is shown. In the present embodiment, the network device 20 can be a gateway, which is connected to the plurality of terminal telephones 10 and the local exchange 30 for the public switched telephone network from the terminal telephone 10 ( Public Switch Telephone
Network，PSTN)電話號碼傳送至本地交換機30。網路 裝置20提供普通通話資源與緊急通話資源，可在有限的 通話資源下保障用戶能撥出緊急電話β [0010]普通通話資源與緊急通話資源包括複數通話頻道，舉例 而言’若網路裝置2〇之通話資源包括128個通話頻道，則 普通通話資源與緊急通話資源可分別包括12〇個與8個通 話頻道。 t〇〇11] 在本發明一實施例中，網路裝置20包括控制模組215、數 位訊號處理模組2Π及儲存模組219，此等模組均設置於 網路語音卡21〇中。儲存模組21 9包括複數緊急電話號碼 ，如 110、119 等。 [0012]作為本發明一實施方式之進一步改進，網路裝置2〇進一 步包括用戶介面模组211，連接於終端電話機1〇與控制模 組215之間，用於將從终端電話機1〇所接收之聲音訊號轉 換為脈衝編碼調變（Pulse Code Modulation，pcm) 資料並傳送至控制模組215，以及將從控制模組215所接 收之PCM資料轉換為聲音訊號並傳送至終端電話機1〇。在 本實施例中，用戶介面模組211可為用戶線介面電路（ 09712931#單编號AG1G1 第6頁/共π頁 1013159671-0 1373955 101年.04月26日修正替換頁The Network, PSTN) telephone number is transmitted to the local exchange 30. The network device 20 provides common call resources and emergency call resources, and can ensure that the user can dial the emergency call under the limited call resources. [0010] Common call resources and emergency call resources include multiple call channels, for example, if the network The call resource of the device 2 includes 128 call channels, and the normal call resource and the emergency call resource may respectively include 12 and 8 call channels. In an embodiment of the invention, the network device 20 includes a control module 215, a digital signal processing module 2, and a storage module 219. The modules are all disposed in the network voice card 21A. The storage module 21 9 includes a plurality of emergency telephone numbers, such as 110, 119, and the like. [0012] As a further improvement of an embodiment of the present invention, the network device 2 further includes a user interface module 211 connected between the terminal phone 1 and the control module 215 for receiving from the terminal phone 1 The voice signal is converted into Pulse Code Modulation (pcm) data and transmitted to the control module 215, and the PCM data received from the control module 215 is converted into an audio signal and transmitted to the terminal telephone 1 . In this embodiment, the user interface module 211 can be a subscriber line interface circuit (09712931# single number AG1G1 page 6 / total π page 1013159671-0 1373955 101 years. April 26 correction replacement page
Subscriber Line Interface Circuit ， SLIC)。 [0013] 控制模組215連接於用戶介面模组211，用於經由用戶介 面模組211從終端電話機1〇偵測PSTN撥號，即雙音多頻 (Dual Tone Multiple Frequency，DTMF)撥號， 並當债測到PSTN撥號時判斷普通通話資源是否用完。在 本實施例中’網路裝置2〇判斷普通通話資源之通話頻道 是否全部被使用’如果全部被使用，則普通通話資源已 用完’如果沒有全部被使用，則普通通話資源未用完。 [0014] 數位訊號處理模組217用於當普通通話資源已用完時經由 用戶介面模組211與控制模組215從终端電話機1〇接收 PSTN電話號碼，並判斷pstn電話號碼是否匹配儲存模組 219中的複數緊急電話號碼，以及當psTN電話號碼匹配該 等緊急電話號碼時將PSTN電話號碼藉由緊急通話資源重 撥至本地交換機30。在本實施例中，數位訊號處理模組 21 7將PSTN電話號碼與該等緊急電話中每一個緊急電話相 比對來判斷PSTN電話號碼是否匹配該等緊急電話號碼。 如果PSTN電話號碼與該等緊急電話號碼其中之—相同， 則pstn電話號碼與該等緊急電話號碼相匹配。若psTN電 話號碼與該等緊急電話號碼中任一個均不相同，貝,jPSTN 電話號碼與該等緊急電話號碼不匹配。 _5]鮮m組還用於當普通通話^完時連接用戶介 面模組211與數位訊號處理模組217，當普通通話資源未 用完時連接用戶介面模組211與本地交換機3〇 ,當psTN 電話號碼匹配該等緊急電話號碼時連接數位訊號:理模 組217與本地交換機30，以及當mN電話號碼不匹配該 09712931产單编號A〇101 第7頁/共17頁 1013159671-0 1373955 等緊急電話號碼時連接數位訊號處理模組217與用戶介^ 模組211。在本實施例中，控制模組21 5包括時槽交換器 (Time Slot Interchange ，TSI)。 [0016] 在本發明一實施例中’當用戶拿起終端電話機1 〇撥打 PSTN電話時’控制模組215經由用戶介面模組211從線端 電話機10偵測PSTN撥號，並判斷普通通話資源是否用完 〇 [0017] 如普通通話資源未用完，控制模組215連接用戶介面模& 211與本地交換機30，經由用戶介面模組211從終端電話 機10接收PSTN電話號碼，並將PSTN電話號碼藉由普通通 話資源傳送至本地交換機30 » [0018] 如普通通話資源已用完，控制模組215連接用戶介面棋& 211與數位訊號處理模組217 ^此時，數位訊號處理模組 217經由用戶介面模組211與控制模組21 5從終端電話機 10接收PSTN電話號碼，並判斷PSTN電話號碼是否匹配铸 - 存模組21 9中的複數緊急電話號碼。若PSTN電話號碼與該 等緊急電話號碼不匹配’則數位訊號處理模組217經由控 制模組215與用戶介面模组211播放忙音至終端電話機1〇 〇 [0019] 當數位訊號處理模組217判定PSTN電話號碼匹配該等緊急 電話號碼時’控制模組215連接數位訊號處理模組217與 本地交換機30。此時，數位訊號處理模組217藉由緊急通 話資源重撥PSTN電話號碼至本機交換機3〇。Subscriber Line Interface Circuit, SLIC). [0013] The control module 215 is connected to the user interface module 211 for detecting PSTN dialing, that is, Dual Tone Multiple Frequency (DTMF) dialing, from the terminal telephone 1 through the user interface module 211. When the debt is measured to the PSTN, it is judged whether the normal call resources are used up. In the present embodiment, the network device 2 determines whether or not the call channels of the normal call resources are all used. If all are used, the normal call resources have been used. If not all of them are used, the normal call resources are not used up. [0014] The digital signal processing module 217 is configured to receive the PSTN phone number from the terminal phone 1 through the user interface module 211 and the control module 215 when the normal call resource has been used up, and determine whether the pstn phone number matches the storage module. The plurality of emergency telephone numbers in 219, and the PSTN telephone number are redialed to the local exchange 30 by the emergency call resources when the psTN telephone number matches the emergency telephone numbers. In this embodiment, the digital signal processing module 217 compares the PSTN telephone number with each of the emergency telephones to determine whether the PSTN telephone number matches the emergency telephone numbers. If the PSTN telephone number is the same as those of the emergency telephone numbers, the pstn telephone number matches the emergency telephone number. If the psTN telephone number is different from any of these emergency telephone numbers, the jPSTN telephone number does not match the emergency telephone numbers. _5] The fresh m group is also used to connect the user interface module 211 and the digital signal processing module 217 when the normal call is completed, and connect the user interface module 211 and the local switch 3 when the normal call resources are not used, when the psTN When the telephone number matches the emergency telephone numbers, the digital signal is connected: the management module 217 and the local exchange 30, and when the mN telephone number does not match, the 09712931 production order number A 〇 101 page 7 / 17 pages 1013 915 967 -01 1373955, etc. The digital signal processing module 217 and the user interface module 211 are connected to the emergency telephone number. In this embodiment, the control module 21 5 includes a Time Slot Interchange (TSI). [0016] In an embodiment of the present invention, when the user picks up the terminal telephone 1 and dials the PSTN call, the control module 215 detects the PSTN dialing from the line telephone 10 via the user interface module 211, and determines whether the normal call resource is When the normal call resource is not used up, the control module 215 connects the user interface module & 211 with the local exchange 30, receives the PSTN phone number from the terminal phone 10 via the user interface module 211, and uses the PSTN phone number. The normal call resource is transmitted to the local switch 30. [0018] If the normal call resource is exhausted, the control module 215 is connected to the user interface chess & 211 and the digital signal processing module 217. At this time, the digital signal processing module 217 The PSTN telephone number is received from the terminal telephone 10 via the user interface module 211 and the control module 215, and it is determined whether the PSTN telephone number matches the plurality of emergency telephone numbers in the cast-storage module 219. If the PSTN phone number does not match the emergency phone numbers, the digital signal processing module 217 plays the busy tone to the terminal phone 1 via the control module 215 and the user interface module 211. [0019] When the digital signal processing module 217 determines When the PSTN telephone number matches the emergency telephone numbers, the control module 215 connects the digital signal processing module 217 with the local exchange 30. At this time, the digital signal processing module 217 redials the PSTN telephone number to the local exchange 3 by the emergency call resource.
CC
[0020] 在本發明另一實施例中’用戶亦可拿起終端電話機1 〇撥 1013159671-0 097129310编號 AQ1G1 "頁 / 共 17 頁 ΙΟί年04月26日梭正替換頁~] 打網路協定語音（Voice over Internet Protocol，[0020] In another embodiment of the present invention, 'the user can also pick up the terminal telephone 1 to dial 1013159671-0 097129310 number AQ1G1 " Page / Total 17 pages ΙΟί年04月26日 Shuttle replacement page~] Voice over Internet Protocol (Voice over Internet Protocol,
VoIP)電話，控制模组215還用於經由用戶介面模組211 從终端電話機10偵測VoIP撥號。控制模組215還用於當 偵測到Vo IP撥號時連接用戶介面模組211與數位訊號處理 模組217。數位訊號處理模組217還用於經由用戶介面模 組211從終端電話機1〇接收VoIP電話號碼，並將VoIP電 話號碼傳送至網際網路。 [0021] 作為本發明一實施例之進一步改進，網路裝置20進一步 包括轉換模組221，連接於控制模組215與本地交換機30 之間，用於將從控制模組215所接收之PCM資料轉換為E1 訊號並傳送至本地交換機30，以及將從本地交換機30所 接收之E1訊號轉換為PCM資料並傳送至控制模組215。在 本實施例中，轉換模組221設置於轉換裝置220中，轉換 裝置220與轉換模組221可分別為分時複用交換器（Time Division Multiplexing Switch)與時槽交換器（The VoIP) telephone control module 215 is also used to detect VoIP dialing from the terminal telephone 10 via the user interface module 211. The control module 215 is further configured to connect the user interface module 211 and the digital signal processing module 217 when the Vo IP dialing is detected. The digital signal processing module 217 is also operative to receive a VoIP telephone number from the terminal telephone set 1 via the user interface module 211 and to transmit the VoIP telephone number to the Internet. [0021] As a further improvement of an embodiment of the present invention, the network device 20 further includes a conversion module 221 connected between the control module 215 and the local switch 30 for receiving PCM data from the control module 215. The E1 signal is converted to the local switch 30, and the E1 signal received from the local switch 30 is converted into PCM data and transmitted to the control module 215. In this embodiment, the conversion module 221 is disposed in the conversion device 220, and the conversion device 220 and the conversion module 221 are respectively a Time Division Multiplexing Switch and a time slot switch (
Time Slot Interchange ， TSI)。 [0022] 參閱圖2，為本發明網路裝置20重撥電話之方法一實施方 式之流程圖。網路裝置20重撥電話之方法藉由圖1中的功 能模組來實施。 [0023] 在步驟S200，控制模組215偵測PSTN撥號。在本實施例 中，當用戶拿起終端電話機10撥打PSTN電話時，控制模 組21 5經由用戶介面模組211從終端電話機1 〇偵測PSTN撥 號。 [0024] 在步驟S202，控制模組215判斷普通通話資源是否用完。 〇9712931产單編號 A0101 第9頁/共17頁 1013159671-0 1373955 101年04月26日修正替换頁 在本實施例令，控制模組21 5判斷普通通話資源之通話頻 道是否全部被使用，如果全部被使用，則普通通話資源 已用完’如果沒有全部被使用，則普通通話資源未用完 〇 [0025] 如普通通話資源未用完，則在步驟S214，控制模組21 5經 由用戶介面模組211連接終端電話機1〇與本地交換機30。 [〇〇26] 在步驟S216，控制模組215經由用戶介面模組211從終端 電話機10接收PSTN電話號碼。 [〇〇27] 在步驟S218，控制模組215藉由普通通話資源將PSTN電 話號碼傳送至本地交換機30。 [0028] 如在步驟S202中控制模組215判定普通通話資源已用完’ 則在步驟S204，控制模組215經由用戶介面模組211連接 終端電話機10與數位訊號處理模組217。 [0029] 在步驟S206，數位訊號處理模組217經由用戶介面模組 211與控制模組215從終端電話機10接收PSTN電話號碼。 [0咖]在步驟S2〇8，數位訊號處理模組217判斷PSTN電話號碼 疋否匹配儲存模組219中的複數緊急電話號瑪。在本實施 例中，數位訊號處理模組217將PSTN電話號碼與該等緊急 電話號碼中的每一個相比對來判斷PSTN電話號碼是否匹 配該等緊急電話號碼《如果PSTN電話號碼與該等緊急電 話號碼其中之一相同，則PSTN電話號碼與該等緊急電話 號碼相匹配。SPSTN電話號碼與該等緊急電話號碼中的 任一個均不相同，則PSTN電話號碼與該等緊急電話號碼 不匹配。 09712931#單編號侧1 帛 10 寅 / 共 17 頁 1013159671-0 [0031] 若PSTN電話號碼與該等緊急電話號碼不 1101年.04月26日修正替&頁j 匹配，則在步驟 S220,數位訊號處理模組217經由控制模組215與用戶介 面模組211播放忙音至終端電話機1〇。 [0032] 當數位訊號處理模组2Π判定PSTNf話號碼匹配該等緊急 電話號瑪時’在步驟S2U) ’控制模組215連接數位訊號處 理模組217與本地交換機30。 [0033] [0034] [0035] [0036] 在步騾S212，數位訊號處理模組217藉由緊急通話資源重 撥PSTN電話號碼至本機交換機3〇。 因此，本發明網路裴置20藉由區分普通通話資源與緊急 通話資源，以及藉由數位訊號處理模組217重撥PSTN電話 至本地交換機30，從而在有限的通話•資源下保障用戶能 撥出緊急電話。 綜上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 熟悉本案技藝之人士 ’在爰依本案發明精神所作之等效 修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 圖1係本發明網路裝置之實施環境圖及一實施方式之模組 圖。 [0037] 圖2係本發明網路裝置重撥電話之方法一實施方式之流程 [0038] 【主要元件符號說明】 終端電話機1 〇 09712931#單編號i A0101 第11頁/共17頁 1013159671-0 1373955 101年04月26日按正番換頁 [0039] 網路裝置20 [0040] 網路語音卡210 [0041] 用戶介面模組211 [0042] 控制模組215 [0043] 數位訊號處理模組217 [0044] 儲存模組219 [0045] 轉換裝置220 [0046] 轉換模組221 [0047] 本地交換機30 09712931 产單编號 A〇101 第12頁/共17頁 1013159671-0Time Slot Interchange, TSI). [0022] Referring to FIG. 2, a flow chart of an embodiment of a method for redialing a telephone by the network device 20 of the present invention is shown. The method of redialing the telephone by the network device 20 is implemented by the functional module of Fig. 1. [0023] In step S200, the control module 215 detects the PSTN dialing. In the present embodiment, when the user picks up the terminal telephone 10 to dial the PSTN call, the control module 215 detects the PSTN dial from the terminal telephone 1 via the user interface module 211. [0024] In step S202, the control module 215 determines whether the normal call resources are used up. 〇9712931bill number A0101 Page 9/17 page 1013159671-0 1373955 April 26, 2011 Revision of the replacement page In this embodiment, the control module 215 determines whether the call channel of the normal call resource is used, if If all of them are used, the normal call resources are used up. If the call resources are not used up, the normal call resources are not used up. [0025] If the normal call resources are not used up, then in step S214, the control module 215 is via the user interface. The module 211 connects the terminal telephone 1 to the local exchange 30. [〇〇26] In step S216, the control module 215 receives the PSTN telephone number from the terminal telephone 10 via the user interface module 211. [〇〇27] In step S218, the control module 215 transmits the PSTN telephone number to the local exchange 30 by ordinary call resources. [0028] If the control module 215 determines that the normal call resources have been used up in step S202, the control module 215 connects the terminal phone 10 and the digital signal processing module 217 via the user interface module 211 in step S204. [0029] In step S206, the digital signal processing module 217 receives the PSTN telephone number from the terminal telephone 10 via the user interface module 211 and the control module 215. In step S2, the digital signal processing module 217 determines whether the PSTN telephone number 匹配 matches the plurality of emergency telephone numbers in the storage module 219. In this embodiment, the digital signal processing module 217 compares the PSTN telephone number with each of the emergency telephone numbers to determine whether the PSTN telephone number matches the emergency telephone number "if the PSTN telephone number and the emergency are If one of the phone numbers is the same, the PSTN phone number matches those emergency phone numbers. The SPSTN telephone number is not the same as any of the emergency telephone numbers, and the PSTN telephone number does not match the emergency telephone numbers. 09712931#单单侧1 帛10 寅/ Total 17 pages 1013159671-0 [0031] If the PSTN telephone number does not match the emergency telephone number 1101.0426, the correction & page j, then in step S220, The digital signal processing module 217 plays the busy tone to the terminal telephone 1 via the control module 215 and the user interface module 211. [0032] When the digital signal processing module 2 determines that the PSTNf phone number matches the emergency phone number, the control module 215 is connected to the digital signal processing module 217 and the local exchange 30 in step S2U. [0036] [0036] At step S212, the digital signal processing module 217 redials the PSTN telephone number to the local exchange 3 by the emergency call resource. Therefore, the network device 20 of the present invention can protect the user from dialing the PSTN call to the local exchange 30 by the digital signal processing module 217 by distinguishing the common call resources from the emergency call resources. An emergency call. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art to the present invention are included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing an implementation environment diagram and an embodiment of a network device of the present invention. 2 is a flow chart of an embodiment of a method for redialing a telephone of a network device according to the present invention [0038] [Description of main component symbols] Terminal telephone 1 〇09712931# Single number i A0101 Page 11 / Total 17 pages 1013157671-0 1373955 April 26, 101, according to the original page [0039] Network device 20 [0040] Network voice card 210 [0041] User interface module 211 [0042] Control module 215 [0043] Digital signal processing module 217 [0044] storage module 219 [0045] conversion device 220 [0046] conversion module 221 [0047] local exchange 30 09712931 production order number A 〇 101 page 12 / a total of 17 pages 1013151671 -1