https://vapi.ai/ logo
Join Discord
Powered by
How can I make `warm transfer call` using the call...
# support
m
I see the snipet to make 
Transfer Call
using call control url
Copy code
sh
curl -X POST 'https://aws-us-west-2-production1-phone-call-websocket.vapi.ai/7420f27a-30fd-4f49-a995-5549ae7cc00d/control' 
-H 'content-type: application/json' 
--data-raw '{
  "type": "transfer",
  "destination": {
    "type": "number",
    "number": "+1234567890"
  },
  "content": "Transferring your call now"
}'
docs - https://docs.vapi.ai/calls/call-features How can I make it warm transfer, and make a custom announcement before transfer?
v
Hi there! 👋 I don't have a specific modified code snippet that shows exactly how to implement a warm transfer with the call control URL, but I can definitely help you understand how to make warm transfers with custom announcements in Vapi! Based on the information I found, there are a few ways to implement a warm transfer with a custom announcement: ## Using the 
content
field (as in your example) Your example already includes the basic structure for a custom announcement with the 
content
field:
Copy code
json
{
  "type": "transfer",
  "destination": {
    "type": "number",
    "number": "+1234567890"
  },
  "content": "Transferring your call now"
}
This will speak the message "Transferring your call now" before transferring the call, which is a simple form of warm transfer. [According to Vapi's documentation](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341701224814219274), the 
content
field is an "Optional message to say before transfer." ## Using 
transferPlan
with different modes For more advanced warm transfer options, you can use the 
transferPlan
object with different modes: ### Warm Transfer with Message
Copy code
json
{
  "type": "transfer",
  "destination": {
    "type": "number",
    "number": "+1234567890",
    "transferPlan": {
      "mode": "warm-transfer-with-message",
      "message": "Hey, this call has been forwarded through Vapi."
    }
  }
}
### Warm Transfer with TwiML (for more complex announcements)
Copy code
json
{
  "type": "transfer",
  "destination": {
    "type": "number",
    "number": "+1234567890",
    "transferPlan": {
      "mode": "warm-transfer-with-twiml",
      "twiml": "<Say>Hello, transferring a customer to you.</Say><Pause length=\"2\"/><Say>They called about billing questions.</Say>"
    }
  }
}
According to [Vapi's call forwarding documentation](https://docs.vapi.ai/call-forwarding), this mode supports 
Play
, 
Say
, 
Gather
, 
Hangup
, and 
Pause
verbs, with a maximum TwiML length of 4096 characters. ### Wait for Operator to Speak First If you want the announcement to happen after the operator answers but before connecting the customer:
Copy code
json
{
  "type": "transfer",
  "destination": {
    "type": "number",
    "number": "+1234567890",
    "transferPlan": {
      "mode": "warm-transfer-wait-for-operator-to-speak-first-and-then-say-message",
      "message": "This is a customer calling about their recent order."
    }
  }
}
Would you like me to explain any of these options in more detail? Sources: - [Vapi's call forwarding documentation](https://docs.vapi.ai/call-forwarding) - [Discord discussion on transfer messages](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341701224814219274) - [Vapi's changelog](https://docs.vapi.ai/changelog/2024/10/13)
s
checking if this is resolved/solved for you?
m
No, I am looking to transfer the call to 911 on emergency with a warm transfer @User , But I am not able to create a transfer plan due to the 
each value in destinations.number must be a valid phone number in the E.164 format. Hot tip, you may be missing the country code (Eg. US: +1)
PreviousNext
Powered by