We have a client who wants to transfer the call to 20 different numbers, we used variable values for it already and its not allowing past 10

Hi there! 👋 I understand you're trying to transfer calls to 20 different numbers but hitting a limit at 10 despite using variable values. Let me help explain what's happening and suggest some potential solutions. The 10-call limit you're experiencing is likely due to Vapi's default concurrency limit. According to the [Vapi billing documentation](https://docs.vapi.ai/billing/billing-limits), there's a default limit of 10 simultaneous calls (both inbound and outbound combined) for each account. This limit applies at the account level, not at the phone numbers level. Here are some potential workarounds you could try: 1. Purchase additional concurrent lines - To handle more than 10 concurrent calls, you can purchase additional concurrent lines through the Vapi dashboard. This would increase your concurrency limit beyond the default of 10. 2. Import a Twilio number - Some users have bypassed call limits by purchasing a Twilio number directly and importing it into Vapi. According to [user reports in Discord](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1335339071211438160), this approach can help bypass the 10 outbound calls per day limit. 3. Use SIP Trunking - Configuring SIP Trunking might offer an alternative method for call forwarding that could handle more transfers. 4. Use SIP Headers - For transferring data across multiple calls, you might want to explore using SIP Headers as suggested in [Discord discussions](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1340813822193041499). 5. Forward to a VAPI agent - You could set up call forwarding to a VAPI agent that then handles the distribution to your 20 numbers. Would you like more specific information about implementing any of these workarounds for your use case? Sources: - [Vapi billing documentation](https://docs.vapi.ai/billing/billing-limits)

Hey! To help track down this issue, could you share: - The call ID - What response you expected to get - What response you actually got instead This would really help us figure out what went wrong!

As you can see here, you are using Assistant Overrides and you are passing a transfer tool. Just because you didn't assign any name, the tool specification is considered invalid, and eventually all of your transfer calls or call forwarding actions are failing.

{
    "model": "gpt-4o",
    "tools": [
        {
            "type": "transferCall",
            "destinations": [...]
        }
    ]
}

logs

json
🟡 00:14:04:520 Couldn't Find Local Tool: {

Hi @Shubham Bajaj , What if its actually transferring the calls, still using this same Webhook response, Buh it just cant do more than 9 Just like this, The transfer works buh just cant go above 9?

Hey Philip and John, Transfer can go more than 9 destinations when you say it doesn't work or it does randomly. It's mostly because of prompting and your destination descriptions. Share a call ID with me for both of you and where it didn't work according to you, and then I'll suggest you the narrow down changes to make it work. If required, I'll add myself to your org and show how things work.

fced6989-24e3-483c-973e-ea64d4e8452b

Hey John and Philip, We keep logs for two weeks only, which is why I couldn't look into them. For your information, you can transfer to more than 9 destinations; it's just that it's all about your description and prompting. This ticket is still open, I'll be checking with you guys agin. https://cdn.discordapp.com/attachments/1356401875263422526/1360041508849455345/image.png?ex=67f9acdc&is=67f85b5c&hm=6ab3e4bd4b33a12a217df1e05cf336040382830295c317ec2c681c44e4e61aeb&

a gentle reminder to continue this thread.