Create new API proposal-Verified Caller

APIBacklog/documentation/SupportingDocuments/API proposals/NewAPIproposal_Verified Caller.txt

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+| **Field**                                 | Description                                                  |
+| :---------------------------------------- | ------------------------------------------------------------ |
+| API family name                           | Verified Caller                                              |
+| API family owner                          | China Telecom, China Unicom，ZTE                             |
+| API family summary                        | **High-level description**. This API allows accurate operator-certified "Verified Caller" information, including SMS and video clips, to be displayed on the phone screen of the called user before they answer the call. This API enables enterprise customers to vividly present their multimedia business cards and reduces the incidence of malicious calls. It is applicable to customers in industries such as government, finance, express delivery, healthcare, education, etc., who have outbound call requirements. For instance, when a hospital arranges follow-ups and communication between customer service and rehabilitation patients, patients might doubt the hospital's identity and typically refuse the calls. By utilizing this API, the hospital's identity can be displayed, thereby improving connection rates and significantly enhancing customer service satisfaction. **Input params**: APIserviceID, TargetNumber, SenderNumber, TemplateCode, TemplateParams. **Output params**: API success or failure response. |
+| Technical viability                       | This API leverages existing SMS and RCS services provided by operators. |
+| Commercial viability                      | This API has been commercially launched in China Telecom and several other operators. However, the API is not yet standardized. In order to achieve a wider range of commercialization and easy use for enterprises and developers, it is necessary to standardize the service API. |
+| YAML code available?                      | TBD                                                          |
+| Validated in lab/productive environments? | YES, Commercially launched in China Telecom.                 |
+| Validated with real customers?            | Yes                                                          |
+| Validated with operators?                 | Yes, China Mobile, China Unicom.                             |
+| Supporters in API Backlog Working Group   |                                                              |