Added dtmf support

src/CallControl/Action/DtmfAction.ts

@@ -0,0 +1,10 @@
+import {ModifyCallAction} from "./ModifyCallAction";
+
+export class DtmfAction extends ModifyCallAction {
+    constructor(callID: string, digit: string|number, phoneID?: string) {
+        super(callID, 'dtmf', {
+            digit: digit,
+            phone_id: phoneID
+        });
+    }
+}

src/CallControl/CallControl.ts

@@ -8,6 +8,7 @@ import {ModifyCallAction} from "./Action/ModifyCallAction";
 import {ClearvoxAPIClient} from "../Client/ClearvoxAPIClient";
 import {AnswerAction} from "./Action/AnswerAction";
 import {BlindTransferAction} from "./Action/BlindTransferAction";
+import {DtmfAction} from "./Action/DtmfAction";
 
 import * as uuid from "uuid/v4";
 import * as EventEmitter from "events";
@@ -209,6 +210,10 @@ export class CallControl extends EventEmitter {
         this.sendAction(new InviteToGroupCallAction(channel.getCallID(), numbers));
     }
 
+    public dtmf(channel: Channel, digit: string, phone?: string): void {
+        this.sendAction(new DtmfAction(channel.getCallID(), digit, phone));
+    }
+
     public getPhoneCapabilities(phone: string): Promise<{ phoneID: string, capabilities: PhoneCapabilities }> {
         return new Promise((resolve, reject) => {
             this.sendAction(new GetPhoneCapabilitiesAction(phone));