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To bring your Voice Agents to life, you must connect them to a telephony provider. This section covers how to add phone numbers, link them to specific Recipes, and configure advanced call behavior for your Voice Agents.

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Adding a Phone Number

You can integrate your existing telephony infrastructure to route calls through Verloop’s Voice Agents.
1

Initiate Setup

Navigate to Settings > Voice > Phone Numbers and click the + Add another number button.
2

Phone Setup

Link your physical number to a conversational flow:
  • Phone Number: Select your country code and enter the full phone number.
  • Recipe: Select the specific Recipe (Conversation Flow) that this number should trigger. This allows you to have dedicated lines for specialized Voice Agents.
3

Telephony Provider Setup

Select your preferred provider and enter the required credentials from your provider’s dashboard:
ProviderRequired Credentials
TwilioAccount SID, Auth Token
ExotelAccount SID, API Key, API Token, Outbound App Id, Sub Domain
KnowlarityAPI Token, API Key, Plan Id, Plan Name, Sound Id
Verloop.ioUse Verloop’s native telephony stack.
4

Speech Recognition & Voice

Fine-tune how the Voice Agent listens and Automate Phone Calls on this specific line:
  • Language: Select the primary language for speech-to-text processing.
  • Boosted Keywords: Enter specific words (like brand names or industry terms) to increase recognition accuracy. This is highly recommended for Hinglish and specialized Arabic Accent AI Agents.
  • Voice Setup: Choose the default Speech Profile for this number.

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Advanced Call Configurations

Manage the lifecycle of a call to optimize costs and improve user experience through the Other configurations section.

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End Call on Silence

This setting determines the time from the last message from the user when the system will force close the call.
  • Range: 1 minute up to 5 minutes.
  • Best Practice: For Voice Agents for Banking, a slightly longer silence threshold can accommodate natural pauses(when user might be searching for documents) in conversation.

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Max call duration with AI

To prevent runaway costs or stuck sessions, set a hard limit on the longest a phone call will be allowed to go on before forced disconnection.
  • Range: 5 minutes up to 30 minutes.
  • Usage: For complex support flows using Voice Agents, a 10-15 minute limit is typically sufficient.
  • Best Practice: For Voice Agents for Marketing and Voice Agents for Outbound Calling, in our experience calls do not go past 2-3 minutes.

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Managing Existing Numbers

On the main Phone Numbers page, you can see a summary of all connected lines:
  • Status Toggle: Quickly enable or disable a number using the green toggle switch.
  • Provider Label: Easily identify if a number is hosted via Exotel, Twilio, or Other Partners.
  • Edit/Delete: Expand any number row to modify its Telephony Setup or remove it from the platform.