call-forward
# supporta
adriaVidal
12/18/2025, 11:03 AMhttps://docs.vapi.ai/call-forwarding when will be warm transfer avaliable for BYO SIP trunk Note: Warm transfer functionality is currently available only with Twilio-based telephony systems. #SIPTRUNK
#twilio
v
Vapi Support Bot
12/18/2025, 11:04 AMCurrently, warm transfer functionality is only available with Twilio-based telephony systems and is not supported for BYO SIP trunk.
There is no announced timeline for when this feature will be available for other providers.
For updates, keep an eye on the [Vapi call forwarding documentation](https://docs.vapi.ai/call-forwarding).
Source:
- [Vapi Call Forwarding Documentation](https://docs.vapi.ai/call-forwarding)
a
adriaVidal
12/18/2025, 11:07 AMbut these make the solution not friendly or platform agnostic
adriaVidal
12/18/2025, 11:10 AMhttps://docs.vapi.ai/calls/call-dynamic-transfers don't talk about been only Twilio compatible
adriaVidal
12/18/2025, 3:06 PMwe are planning a big deployment about 60.000 calls by month but these is a stopper for the project
n
Nir Simionovich (CEO@Cloudonix)
12/21/2025, 2:33 PM@adriaVidal You can integrate Cloudonix as a frontline to your SIP BYO - it will make your Warm Transfers easier to handle and more compatible with VAPI.
a
adriaVidal
12/22/2025, 12:34 PMbut if VAPI is only compatible with warm transfer via Tiwlio how can help put Cloudonix between our systems and Vapi?
n
Nir Simionovich (CEO@Cloudonix)
12/22/2025, 1:35 PMBetween Cloudonix will translate it - Cloudonix is similar to Twilio in that respect