> For the complete documentation index, see [llms.txt](https://library.zoom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://library.zoom.com/technical-library/zh-tw/zoom-workplace/zoom-phone/expert-insights/emergency-services-best-practices/u.s.-canada-pidf-lo-address-delivery.md).

# 美國／加拿大—PIDF-LO 地址傳遞

在美國和加拿大，當 Zoom 服務處理緊急來電時，偵測到的地址會透過 PIDF-LO 協定直接嵌入通話信令中。這與來電者 ID 無關。

**美國／加拿大流程：** 使用者撥打 911 **→** Zoom 透過網路資料偵測位置 **→** 可派遣地址透過 PIDF-LO 嵌入通話中 **→** PSAP 直接收到地址：無需查詢資料庫。

#### 主要優點

* **不需要 ELIN** — 地址隨通話信號傳送，並非綁定在電話號碼上
* **即時地址更新** — 使用者和管理員可透過 Zoom 入口網站更新地址；無需更新電信業者資料庫
* **僅分機使用者也完全支援** — 他們使用緊急號碼池作為來電者 ID，但其偵測到的可派遣地址仍會透過 PIDF-LO 直接傳送
* **個人位置數量不限** — 遠端工作者可視需要建立任意多個，並在近乎即時的時間內啟用

#### 美國／加拿大的 BYOC 客戶

如果您日常通話使用 BYOC，Zoom 將提供緊急來電路由（不另收費）。這非常推薦，因為它提供上述所有 PIDF-LO 優勢。一般通話仍透過 BYOC 電信業者進行；只有緊急通話會經由 Zoom 路由。

#### 當沒有位置比對時的備援機制（美國／加拿大）

如果找不到網路比對結果，且裝置沒有 GPS：

* 如果使用者先前已確認個人地址，則會回報該地址
* 否則，位置會回報為「Unknown」，且通話會路由至全國性轉接中心，由其以口頭方式確認來電者位置後，再連接至正確的 PSAP。


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