本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# 在緊急呼叫中使用 PIDF-LO
<a name="use-pidf-lo"></a>

 Amazon Chime SDK Voice Connectors 支援增強型 911 (E911) 呼叫。當您透過語音連接器撥打緊急通話時，您可以透過在 SIP 請求中包含 GEOPRIV 存在資訊資料格式位置物件 (PIDF-LO) 來傳送來電者位置資訊。物件必須包含 `Geolocation-Routing`標頭，設定為 `Yes`。我們強烈建議[您驗證地址](validate-emergency-addresses.md)。如果您不使用地址或路由號碼，可能會在 911 呼叫開始時執行地址驗證，以確保它路由到適當的公共安全接聽點 (PSAP)，這表示協助可能需要更長的時間才能送達。

下列範例顯示包含 地址的 PIDF-LO 物件的 SIP 邀請。

```
INVITE sip:911@{{abcdef1ghij2klmno3pqr4}}.voiceconnector.chime.aws;transport=TCP SIP/2.0
Via: SIP/2.0/TCP IPaddress:{{12345}};rport;branch={{z9hG4bKKXN2D41yvDUKH}}
From: {{+15105186683}} ><sip:+15105186683@IPaddress:12345>;tag=tag
To: <sip:911@{{abcdef1ghij2klmno3pqr4}}.voiceconnector.chime.aws>;transport=TCP
Call-ID: {{12abcdef-3456-7891-012g-h7i8j9k6l0a1}}
CSeq: {{43615607}} INVITE
Contact: <sip:{{IPaddress}}:{{12345}}>
Max-Forwards: {{70}}
Geolocation-Routing: {{Yes}}
Geolocation: <cid:{{a1ef610291734f98a467b973819e90ed}}>;inserted-by=vpc@ng911.test.com
Content-Type: multipart/mixed;boundary=unique-boundarystring
Content-Length: 271
Accept: application/sdp, application/pidf+xml

--unique-boundarystring
Content-Type: application/sdp
v=0
o=FreeSWITCH {{1636327400}} {{1636327401}} IN IP4 IPaddress
s=FreeSWITCH
c=IN IP4 IPaddress
t=0 0
m=audio 11398 RTP/SAVP 9 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=sendrecv
a=ptime:20

--unique-boundarystring
Content-Type: application/pidf+xml
Content-ID: <{{pidftest@test.com}}>
<?xml version="1.0" encoding="utf-8"?>
<presence xmlns="urn:ietf:params:xml:ns:pidf"
xmlns:gp="urn:ietf:params:xml:ns:pidf:geopriv10"
xmlns:bp="urn:ietf:params:xml:ns:pidf:geopriv10:basicPolicy"
xmlns:ca="urn:ietf:params:xml:ns:pidf:geopriv10:civicAddr"
entity="sip:{{amazontest911@test.com}}">
<tuple id="0">
    <status>
    <gp:geopriv>
        <gp:location-info>
        <ca:civicAddress>
            <ca:country>US</ca:country>
            <ca:A1>{{WA}}</ca:A1>
            <ca:A3>{{Seattle}}</ca:A3>
            <ca:HNO>{{1812}}</ca:HNO>
            <ca:RD>{{Example}}</ca:RD>
            <ca:STS>Ave</ca:STS>
            <ca:NAM>{{Low Flying Turtle}}</ca:NAM>
            <ca:PC>{{98101}}</ca:PC>
        </ca:civicAddress>
        </gp:location-info>
    </gp:geopriv>
    </status>
    <timestamp>{{2021-09-22T13:37:31.03}}</timestamp>
</tuple>
</presence>
--unique-boundarystring--
```