Phone Lines

Phone Lines page for managing phone numbers

Phone Lines are the numbers your AI assistants use for calls — both as outbound caller ID and for receiving inbound calls. EolasFlow makes it easy to purchase and manage numbers from around the world via Twilio.

Phone Line Overview

Your Phone Lines page shows:

Number — The phone number
Country — Where the number is registered
Type — Local, Mobile, or Toll-Free
Status — Active, Pending, or Inactive
Monthly Cost — Recurring charge

Purchasing a Phone Line

Navigate to Phone Lines

Go to Phone Lines in the Organization section and click Browse & Buy.

Select Country

Choose the country where you want a number. Numbers are available in 40+ countries.

Search by Area Code

Optionally enter an area code to find numbers in a specific region.

Choose a Number

Browse available numbers and click Buy.

Confirm

Review the monthly cost and confirm. The number is available immediately.

Local Presence: Choose numbers with local area codes in your target market. People are more likely to answer calls from familiar area codes.

Number Types

Type	Best For	Features
Local	Regional calling	Familiar area code, lower cost
Mobile	SMS + Voice	Can send and receive text messages
Toll-Free	National reach	Free for callers, professional image

Managing Phone Lines

My Numbers

Click the My Numbers tab to see all your purchased numbers.

Release a Number

If you no longer need a number:

Find the number in your list
Click Release
Confirm

Releasing a number is permanent. You may not be able to get the same number back.

Using Numbers in VoiceFlows

When creating a VoiceFlow, select which phone line to use:

Go to VoiceFlows and create or edit a VoiceFlow
In the Phone Line dropdown, select from your purchased numbers
This number will be the caller ID for all outbound calls and the receiving line for inbound

Each VoiceFlow uses one phone line. Create separate VoiceFlows if you need different caller IDs.

Importing Existing Numbers

Already have phone numbers with Twilio or WhatsApp Business? Import them into EolasFlow instead of purchasing new ones. Click the Import Number tab on the Phone Lines page. EolasFlow supports importing from multiple providers:

Provider	Status	Use Case
Twilio	Available	Import existing Twilio numbers for voice + SMS
WhatsApp	Available	Connect WhatsApp Business numbers for voice calls
Telnyx	Coming Soon	—
SignalWire	Coming Soon	—
Vonage	Coming Soon	—
Bandwidth	Coming Soon	—

Import from Twilio

Click Import Number

Go to Phone Lines and click the Import Number tab, then select Twilio.

Enter Phone Number

Enter the number in E.164 format (e.g., +14156021922).

Enter Account SID

Your Twilio Account SID, found on your Twilio dashboard.

Choose Authentication Method

Auth Token — Quick setup. Copy from your Twilio dashboard.
API Key — More secure. Revocable and scoped. Recommended for production.

Enter Credentials

Paste your Auth Token or API Key + Secret.

Optional Settings

Label — A friendly name for this number (e.g., “Sales Line”)
Enable SMS — Toggle on if you want SMS messaging on this number

Validate & Import

Click Validate & Import. EolasFlow verifies the number and automatically configures webhooks to route calls through the platform.

Webhooks are automatically configured on your Twilio number to route calls through EolasFlow. Your credentials are stored securely server-side and never exposed to the browser. You can disconnect the number at any time to restore original webhooks.

Import from WhatsApp Business

Click Import Number

Go to Phone Lines → Import Number → select WhatsApp.

Enter Phone Number

Your WhatsApp Business phone number in E.164 format.

Enter Phone Number ID

The Phone Number ID from your Meta Business Manager / WhatsApp Cloud API dashboard.

Enter Permanent Access Token

A permanent access token from Meta for API access to this number.

Optional Label

Add a friendly name for this number.

Connect

Click Connect WhatsApp Number. EolasFlow registers the webhook to receive WhatsApp calls and messages on this number.

Import Number — WhatsApp Business provider form

After importing a WhatsApp number, you can enable WhatsApp Messaging on a VoiceFlow to handle both voice calls and text conversations on the same number. See WhatsApp Messaging.

Transfer Contacts

Transfer contacts are the people and departments your AI can transfer calls to. When the Transfer tool is active on a VoiceFlow, the AI uses this list to route calls to the right person. Click the Transfer Contacts tab on the Phone Lines page to manage your transfer destinations.

Adding a Transfer Contact

Go to Transfer Contacts

Navigate to Phone Lines and click the Transfer Contacts tab.

Enter Details

Fill in the contact information:

Name — A descriptive label (e.g., “Billing Department”, “Manager John”, “Dr. Smith”)
Phone Number — The number to transfer to (E.164 format)
Email — Optional email address for the contact

Click Add Contact

The contact is saved and immediately available in the Transfer tool dropdown in VoiceFlow Studio.

When the AI needs to transfer a call, it selects from this list. The contact name helps the AI match caller requests — for example, if a caller says “I need to speak to billing,” the AI matches that to a transfer contact named “Billing Department.”

Use clear, descriptive names for transfer contacts. Names like “Billing”, “Sales Manager”, or “Dr. Smith — Dermatology” help the AI route transfers accurately.

Best Practices

Start with One Number: Begin with a single number to test, then add more as you scale.

Match Your Market: Use local numbers where your contacts are located.

Keep Numbers Active: Numbers build reputation over time. Avoid frequently switching.

Phone Line Overview

Purchasing a Phone Line

Number Types