Welcome to the RingCentral Community

This is weird. I test over and over again to forward incoming calls to an extension and it works every time. Here is how I handle an incoming call to extension 102, forward the call to extension 103 using the forward API in Node JS.

subscription.on(subscription.events.notification, function(msg)
    console.log("======");
    if (msg.event.indexOf('telephony/sessions') > 0){
      var body = msg.body
      //var callerNumber = body.parties[0].from.phoneNumber
      if (body.parties[0].direction == "Inbound" && body.parties[0].status.code == "Setup"){
        console.log(JSON.stringify(msg));
        forwardCallByExtensionNumber(body, '103')
        }
    }
});

async function forwardCallByExtensionNumber(call, extensionNumber){
  var endpoint = '/restapi/v1.0/account/~/telephony/sessions/'
  endpoint += call.telephonySessionId
  endpoint += `/parties/${call.parties[0].id}/forward`
  console.log(extensionNumber)
  console.log(endpoint)
  try{
    var resp = await platform.post(endpoint, {
      extensionNumber : extensionNumber
    } )
    var jsonObj = await resp.json()
    console.log(JSON.stringify(jsonObj))
    console.log("FORWARDED")
  }catch(e){
    console.log(e)
  }
}