Vapi and Asterisk error when trying to transfer fr...
# supportr
rocha
02/14/2025, 10:08 PMHello, I have been experiencing some unresolved problems on my side after many analyses..
It seems to me that it is a problem on the Vapi side when handling SIP telephony. The following happens:
I configured an Asterisk server to receive calls and forward them to VAPI, however, I have experienced some instabilities during testing. It happens that sometimes the transfer occurs successfully, but simply out of nowhere, at some point during the day VAPI starts to refuse my calls, and at another time it starts accepting calls again. It's very fickle and I need a solution for it.
p
Praveen
02/15/2025, 9:34 PMHey! To help track down this issue, could you share:
- The call ID
This would really help us figure out what went wrong!
r
rocha
02/16/2025, 5:31 PMHow can i get the call ID, if vapi rejected the call?
rocha
02/16/2025, 5:31 PMNow it is working fine again, so i cannot try to get the error message
rocha
02/16/2025, 5:32 PMBut i know that in some hours, or tomorrow, vapi will respond it with rejection or any error again
rocha
02/16/2025, 5:32 PMAnd i will have another problem with customers
rocha
02/16/2025, 5:32 PMIt is being very unstable..
p
Praveen
02/17/2025, 1:18 PMWithout the PCAP file or Call ID, I am unable to identify the issue you are experiencing. To unblock your account, I require either of these documents. Please inform me when you are able to provide them.
r
rocha
02/17/2025, 1:54 PM1b36256b-f629-4e97-8e5f-f86d46e111bd
bad19138-f401-43fc-967c-ec5549240302
Could you check those?
rocha
02/17/2025, 2:22 PMI don't think the support I need involves analyzing the callids, since the call isn't even authorized by the vapi sip. Therefore, they don't generate any recording, since the call didn't even happen. I'm trying to get a window on Asterisk with my team to get the exact error and try to provide you with more context.
rocha
02/17/2025, 6:19 PMCould you please check why this call got timed out even with customer talking? 19e1172e0dce72b111d99aa63beec507@sip.vapi.ai
rocha
02/17/2025, 6:20 PM@Shubham Bajaj
rocha
02/18/2025, 1:45 PM@Shubham Bajaj Please help me, sometimes vapi returns error 500 when im transfering to vapi SIP from my asterisk..
rocha
02/18/2025, 1:45 PM80% of transfers it works
rocha
02/18/2025, 1:45 PM20% it returns error 500
rocha
02/18/2025, 2:36 PM2f52941906cfee1109fdbfc42082423a@sip.vapi.ai
There is the call id im issuing problems.
rocha
02/18/2025, 2:36 PMYou can focus on this one, only. This is the problem i've been having.
rocha
02/18/2025, 2:51 PMrocha
02/18/2025, 2:51 PMThis is the same problem im having
rocha
02/18/2025, 2:51 PMHow do i manage to fix it?
p
Praveen
02/19/2025, 9:46 AMRocha Looking into your issue.
Praveen
02/19/2025, 9:58 AM
Call ID: bad19138-f401-43fc-967c-ec5549240302
It looks like you’re analyzing a possible call termination issue related to a closed WebSocket connection. Here’s how we can refine this further:
---
Call Termination Analysis
- Frame 7:
200 OK (INVITE)ACK200 OKBYEBYEphone-call-provider-closed-webcoket-connectionBYEPraveen
02/19/2025, 10:03 AM
1b36256b-f629-4e97-8e5f-f86d46e111bd
This BYE request in Frame 10 is a SIP termination message. 35.198.23.153 (caller) is sending the BYE to 44.229.228.186:5060 (VAPI). The SIP call was established successfully (200 OK was received earlier), and then the caller (35.198.23.153) decided to end the call after about 6 seconds.
The hang-up was intentional and normal (not due to network failure or timeout).
r
rocha
02/19/2025, 1:37 PMThank you about that, @Shubham Bajaj
rocha
02/19/2025, 1:38 PMBut i keep getting problems with the error 491 request pending from Vapi side..
p
Praveen
02/21/2025, 4:05 AMHey Rocha, can you share those call Ids?
FYI: I am marking your ticket under Priority tickets.
n
Nir S (CEO/Founder @Cloudonix)
03/01/2025, 5:21 PM@rocha I've investigated this issue a while back, and I believe the root cause of this issue is caused by Vapi's use of DNS round-Robin records for the
sip.vapi.ai8 Views