# 挂机原因值、Q850原因值、呼叫拆线点
调用语音通话相关接口会产生接口调用错误码，详见[API错误码](https://support.huaweicloud.com/devg-VoiceCall/rtc_04_0030.html)。
调用接口成功后，如果"statusUrl"和"feeUrl"参数指定了客户接收状态上报的URL和接收话单上报的URL，或在[添加应用](https://support.huaweicloud.com/usermanual-VoiceCall/rtc_02_0009.html)时指定了呼叫状态接收地址和呼叫话单接收地址，则语音通话平台在接收到南向网元返回的呼叫状态通知和话单通知时，会主动将呼叫状态通知和话单通知推送给客户。
消息示例如下：
```
POST /status HTTP/1.1
Content-Length: xx 
{"eventType":"fee","feeLst":[{"direction":0,"spId":"CaaS_Test_01","appKey":"ka4k******YnEm2","icid":"CAE-20190124110424-12019775","bindNum":"+8675512****78","sessionId":"1201_612_4294967295_20190124030424@callenabler245.huaweicaas.com","callerNum":"+86138****0022","calleeNum":"+86138****0021","fwdDisplayNum":"+86138****0022","fwdDstNum":"+86138****7021","fwdStartTime":"2019-01-24 03:04:31","fwdAlertingTime":"2019-01-24 03:04:36","fwdAnswerTime":"2019-01-24 03:04:38","callEndTime":"2019-01-24 03:04:49","fwdUnaswRsn":0,"ulFailReason":0,"sipStatusCode":0,"callOutStartTime":"2019-01-24 03:04:24","callOutAlertingTime":"2019-01-24 03:04:27","callOutAnswerTime":"2019-01-24 03:04:31","callOutUnaswRsn":0,"recordFlag":0,"ttsPlayTimes":0,"ttsTransDuration":0,"serviceType":"002","hostName":"callenabler245.huaweicaas.com"}]}
```
挂机原因值、Q850原因值、呼叫拆线点请参考[通话挂机原因值说明](https://support.huaweicloud.com/api-VoiceCall/rtc_05_0022_1.html)。