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Overview

Aidan supports three carriers: Twilio, Vonage, and Telnyx. Each shines in different markets and price brackets. This guide will help you pick the right one for every client.
Quick Recommendation: - 🇺🇸 US/Canada traffic? Use Twilio (best reliability and features) - 🌍 International traffic? Use Vonage (per-second billing saves money) - 💰 Cost-conscious international? Use Telnyx + Twilio combo (best rates in AU/UK/NZ/Europe)

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Choosing a Provider

Compare the three carriers to find the best fit for your use case.
Best for: United States (and Canada)

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Strengths

  • ✅ Quick, self-serve setup—buy numbers in minutes
  • ✅ High concurrency limits—perfect for large campaigns
  • ✅ Built-in voicemail detection (saves wasted agent talk-time)
  • ✅ Verified Caller ID lets you mask calls with a client’s existing phone number
  • ✅ Direct GoHighLevel SMS integration—same number for calls and texts

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Weak Points

  • ❌ Charges by the minute (rounded up), so a 9-second voicemail costs a full minute
  • ❌ Non-US pricing is steep—about 7¢ USD per minute in Australia
Rule of thumb: If the traffic is US-centric, stick with Twilio every time.
Best for: Non-US regions where per-second billing matters

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Strengths

  • ✅ Bills per second—a 30-second call costs half a minute
  • ✅ Slightly cheaper headline rates than Twilio outside the US

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Weak Points

  • ❌ No native voicemail detection (Outbox uses its own transcript-based fallback)
  • ❌ No verified caller IDs
  • ❌ On-boarding is manual: email a rep, fill in forms, wait for approval
  • ❌ No GoHighLevel SMS tie-in, so you’ll juggle separate SMS and voice numbers
When to use: Mid-size international campaigns where per-second pricing outweighs the admin hassle.
Best for: International markets (AU, UK, NZ, Europe) when cost is king and you still want Caller ID masking

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Strengths

  • ✅ Significantly cheaper than Twilio in most international markets (40-60% savings)
  • ✅ Supports verified caller IDs—pair it with a Twilio SMS number for a “one-number” experience
  • ✅ Modern dashboard, good documentation
  • ✅ Competitive rates in AU, UK, NZ, and European countries

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Weak Points

  • ❌ Charges by the minute (no per-second savings)
  • ❌ Occasional reliability quirks: sudden number blocks, quirky concurrency caps
  • ❌ No built-in voicemail detection
  • ❌ No direct GoHighLevel SMS integration (hence the Twilio-plus-Telnyx combo)

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Practical Hybrid Stack

1

Twilio for SMS + Inbound

Buy a Twilio number → connect to GoHighLevel for SMS + inbound voice
2

Telnyx for Outbound

Buy a Telnyx number → set Twilio number as a verified caller ID
3

Save on Costs

Make outbound calls via Telnyx and save 40-60% on international rates
Works great in: AU, UK, NZ, and most European countries

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Twilio Setup

Twilio is the gold standard for US/Canada traffic. Follow these steps to set up a number and connect it to Aidan.

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1. Create (or Open) a Sub-Account

1

Log In

Visit console.twilio.com
2

Navigate to Sub-Accounts

Click your workspace name → Sub-Accounts → Create new sub-account
3

Name Your Sub-Account

Name it after your client to keep billing and logs separate
If Twilio shows multiple “regions”, always leave it on US1 so Aidan can reach the logs.

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2. Build the Regulatory “Bundle” (If Required)

Many countries require proof-of-business before you can purchase phone numbers. Twilio calls this a “regulatory bundle.”
Twilio Regulatory Bundle
US/Canada toll-free and local numbers typically don’t require bundles. Mobile numbers in most countries (including AU, UK, NZ) do require compliance documentation.
1

Navigate to Regulatory Compliance

In the left menu choose Phone Numbers → Regulatory Compliance
2

Create Bundle

Click Create Bundle and fill in: - Country: Select your target country - Number Type: Mobile, Local, or Toll-Free - Business Type: Independent software vendor (or appropriate category)
3

Upload Documents

Twilio typically asks for: - Business name - Business address - Business registration number (ABN for AU, EIN for US, Companies House for UK, NZBN for NZ) Accepted documents: - Utility bills - Lease agreements - Business registration certificates - Tax documents Each file must show at least two of the required data points; upload multiple files if needed. Registry Links: - ASIC (Australia) - Companies House (UK) - New Zealand Companies Office
4

Submit and Wait

Submit; approval usually takes 24-48 hours depending on the country

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3. Buy a Phone Number

1

Navigate to Buy a Number

After the bundle is approved (or immediately for US/Canada), go to Phone Numbers → Buy a number
2

Filter by Country and Capabilities

Filter for your target country and Capabilities = Voice & SMS
3

Choose Your Number

Select a number that matches your needs: - Mobile (AU: 614, UK: 447, NZ: 642) - Best for SMS + voice - Local (US/Canada area codes) - Geographic presence - Toll-free (US: 800/888, AU: 1800, UK: 0800) - Free for callers
4

Buy

Click Buy to purchase the number
Buy Twilio Number
Pricing Examples (per minute, rounded up):
Check Twilio’s pricing page for exact rates in your country.

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4. A2P Registration (US SMS Only)

If you’re sending SMS messages to US numbers, you must register for A2P (Application-to-Person) messaging. This is a US regulation to reduce spam.
Required for US SMS: Without A2P registration, your SMS messages to US numbers will be blocked or heavily throttled (limited to ~5 messages per minute).
A2P Registration

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What is A2P?

A2P (Application-to-Person) registration is required by US carriers for business SMS messaging. It verifies that you’re a legitimate business sending approved content. Two Options:
Timeline: Instant
Cost: Free
Throughput: Only 5-10 messages per minuteIf you’re just testing or sending very low volumes, you can skip full A2P registration. However, your messages will be heavily throttled.
Not suitable for production: Low volume limits make this impractical for real campaigns. Only use for testing or tiny-scale operations.

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Non-US Numbers

If you’re not sending SMS to US numbers (e.g., AU → AU, UK → UK), you can skip A2P registration entirely. It’s only required for US SMS traffic.
International SMS: Other countries have their own regulations, but most don’t require pre-registration like the US does. Always check local requirements for your target market.

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5. Copy Credentials into Aidan

Twilio Integration in Aidan
1

Get Your Credentials

Back in the Twilio console dashboard, copy Account SID and Auth Token
2

Add to Aidan

In Aidan, open Telephony → Twilio and paste both values
3

Select Your Number

The number you just bought appears in the list—select it for outbound voice and SMS
Twilio Integration in Aidan

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6. (Optional) Add a Verified Caller ID for Masking

If your client wants calls to display their existing business line:
1

Navigate to Verified Caller IDs

Twilio left menu → Verified Caller IDs → Add new
2

Enter Business Number

Enter the business number; Twilio sends an SMS or voice code for verification
3

Verify

Once verified, you can choose that caller ID when launching campaigns
Twilio Verified Caller ID
Important: Verified IDs work for outbound only; inbound calls still land on the Twilio number.

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Vonage Setup

Vonage bills by the second and can be cheaper than Twilio outside the US, but the onboarding is more manual. Follow these steps to secure a number and connect it to Aidan.

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1. Log In and Fund the Account

1

Visit Dashboard

Visit dashboard.nexmo.com (same portal, simply re-branded as Vonage)
2

Add Balance

Add a small balance—Vonage won’t let you request numbers on a £0 wallet

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2. Request a Phone Number

1

Navigate to Buy Numbers

In the left sidebar, click Phone Numbers → Buy Numbers
2

Search for Number

Choose the target country and search
3

Request (Not Buy)

Click Request; instead of instant purchase, the portal creates a ticket
4

Provide Documents

A Vonage rep emails you for supporting documents—usually: - Proof of business name and address (utility bill, lease, ASIC extract, etc.) - Business registration ID (ABN, Companies House number, EIN, etc.)
5

Wait for Approval

Email the files back; approval typically lands within 24–48 hours The number appears in your dashboard under My Numbers once approved and billed

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3. Grab Your API Credentials

1

Navigate to API Settings

From the top menu, choose Settings → API Settings
2

Copy Credentials

Copy the API Key and API Secret
Vonage API Credentials

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4. Connect Vonage to Aidan

1

Open Integrations

In Aidan, open Settings → Company → Integrations
2

Select Vonage

Select Vonage
3

Paste Credentials

Paste the API Key and Secret; click Save
4

Assign Numbers

Your purchased numbers populate in the list—assign as needed to voice agents

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Telnyx Setup

Telnyx often offers lower per-minute rates than Twilio in many international markets (especially AU, UK, and Europe), but it lacks GoHighLevel SMS integration and native voicemail detection.

Recommended Strategy

Use Twilio for inbound and SMS (so everything lands in GoHighLevel) Use Telnyx for outbound voice, masking the calls with the same Twilio number through “verified caller ID” This gives you the best of both worlds: Twilio’s reliability + Telnyx’s pricing.
Popular in: Australia, UK, New Zealand, and European markets where Telnyx rates are significantly lower than Twilio.

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Step 1 – Secure a Twilio SMS / Inbound Line

1

Buy Twilio Number

Purchase a Twilio number in your target country, plug the SID & Auth Token into Aidan, and connect it to GoHighLevel
2

Assign to your agent

Keep this number for inbound calls and all texting
3

Add to GoHighLevel (Optional)

Add this number into your GoHighLevel account if you want SMS Capabilities

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Step 2 – Buy a Telnyx Outbound Line

1

Search and Buy

In Telnyx, choose Numbers → Buy Numbers and purchase a voice-capable number in your target country
2

Complete Compliance

Complete the compliance prompts (business documents, address, registration number, etc.)
Buy Telnyx Number

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Step 3 – Create a SIP Trunk

1

Navigate to SIP Trunks

Voice → SIP Trunks → Create SIP Connection
2

Trunk Details

Name it, choose FQDN mode, click Create
3

Authentication & Routing

Leave FQDN empty and scroll down to Outbound Calls Authentication - Set a unique Username (e.g., outbox_user) - Set a strong Password
  • Click Next
4

Configuration

Leave this screen as the defaults and click Next
5

Inbound

Leave this screen as the defaults and click Next
6

Outbound Settings

Configure your outbound call settings: - Localization Country – Select the country you’ll be calling (e.g., Australia, US, UK) - Caller ID Override – Paste the Twilio number you purchased in Step 1 This makes outbound calls display your Twilio number instead of the raw Telnyx number.
7

Configure Voice Profile

Create or select a Voice Profile and whitelist the destinations you plan to dial
8

Assign Number

Assign the Telnyx number to this SIP trunk

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Step 4 – Add Telnyx Number to Aidan

Now connect the Telnyx SIP trunk to Aidan.
1

Navigate to Phone Numbers

In Aidan, go to Company Settings → Phone Number tab
2

Add SIP Number

Click Add SIP Number
3

Configure SIP Details

Fill in the connection details: - Name – Label for this number (e.g., “Client Name - Telnyx Outbound”) - Phone Number – The Telnyx number you purchased (e.g., +61412345678) - SIP Domain – sip.telnyx.com (or 192.76.120.10 if that doesn’t work) - SIP Username – The username you set in Step 3 - SIP Password – The password you set in Step 3
4

Configure Billing

Set your billing preferences: - Rebilling – Toggle ON if you want to charge clients for usage, OFF if you’re covering costs - Outbound Cost – Set to 0.033 (3.3¢ per minute for AU, adjust for other countries) - Billing Type – Keep Bill per minute ON (Telnyx charges by the minute)
5

Save

Click Save to add the number to your account
Telnyx SIP in Aidan
Rebilling: If enabled, Aidan will automatically charge your clients based on their call usage at the rate you set.

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Result

✅ All outbound calls travel via Telnyx (typically 40-60% cheaper than Twilio in most markets)
✅ The callee’s phone displays the familiar Twilio number
✅ Inbound calls and SMS still hit GoHighLevel through Twilio Estimated Savings:
  • Australia: ~3.3¢/min vs ~7¢/min (save ~50%)
  • UK: ~2¢/min vs ~3¢/min (save ~33%)
  • Europe: ~2-3¢/min vs ~4-5¢/min (save ~40%)
Perfect for international teams! You get Twilio’s reliability for SMS and inbound, with Telnyx’s pricing for outbound calls. The savings really add up on high-volume campaigns.

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Cost-Control Reminders

Telnyx charges by the minute (unlike Vonage’s per-second billing). A 61-second call costs 2 minutes.
Telnyx occasionally rate-limits new numbers. If calls start failing, raise a support ticket to increase limits.
Keep an eye on “number blocked” errors mid-campaign. Swap a fresh Telnyx number if needed.
With a multi-provider setup (Twilio + Telnyx), document which number does what so your team doesn’t get confused.

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Best Practices

Don’t try to set up all three at once. Pick the best fit for your primary market and master it first.
  • US/Canada clients? Twilio
  • International clients (per-second billing)? Vonage
  • Cost-conscious international (AU/UK/NZ/Europe)? Telnyx + Twilio combo
Create separate sub-accounts (Twilio) or labeled numbers (Vonage/Telnyx) for each client. This makes billing tracking and troubleshooting 10x easier.
Always send test calls before launching campaigns: 1. Test inbound and outbound 2. Verify caller ID displays correctly 3. Check SMS delivery (if applicable) 4. Confirm call quality and latency
Set up billing alerts in your provider dashboard. Running out of credits mid-campaign is embarrassing and costly.
Keep a spreadsheet of which client uses which caller ID, especially if you’re managing multiple masked setups.

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Troubleshooting

Problem: You’ve bought a number but it’s not showing up.Solutions:
  • Double-check credentials (SID, Auth Token, API Key) are correct
  • Refresh the Aidan page
  • For Twilio, ensure you’re using the correct sub-account credentials
  • For Telnyx SIP, verify the SIP domain is correct (sip.telnyx.com or 192.76.120.10)
Problem: Outbound calls aren’t connecting. Solutions: - Check balance: Ensure your provider account has sufficient funds - Verify number status: Some numbers need activation or compliance approval - Test with a different number: Rule out number-specific issues - Check concurrency limits: You may have hit your max simultaneous calls - Review error logs: Aidan shows detailed error messages in Call Logs
Problem: The wrong number is showing on outbound calls. Solutions: - Twilio: Verify the caller ID is properly verified in Verified Caller IDs - Telnyx: Check the Caller ID Override is set correctly in the SIP trunk - Both: Ensure you’ve selected the correct caller ID in Aidan when setting up the campaign
Problem: Text messages aren’t sending or receiving. Solutions: - Twilio only: SMS doesn’t work with Vonage or Telnyx in GoHighLevel - Verify the Twilio number has SMS capability enabled - Check that the number is properly connected to GoHighLevel - Ensure you have A2P 10DLC registration if sending to US numbers
Problem: Calls have delays or sound choppy. Solutions: - Check your internet connection: Voice requires stable bandwidth - Test from a different location: Rule out local network issues - Try a different SIP region: For Telnyx, switch to a closer POP - Contact provider support: There may be routing issues on their end
Problem: Twilio rejected your compliance documents.Solutions:
  • Ensure documents show at least 2 of 3 required data points (name, address, registration number)
  • Use recent documents (under 3 months old)
  • Make sure text is legible (no blurry photos)
  • Upload multiple documents if one doesn’t cover all requirements
  • Check the rejection email for specific issues
Problem: Your A2P 10DLC registration is taking too long or was rejected.Solutions:If Stuck (over 6 weeks):
  • Contact Twilio support with your campaign ID
  • Check for any pending actions in the A2P dashboard
  • Verify your business EIN is valid and matches official records
If Rejected:
  • Review the rejection reason carefully
  • Common issues:
    • Sample messages look like spam or scams
    • Business website doesn’t match your description
    • Use case is unclear or too broad
    • EIN doesn’t match business name
  • Revise your campaign description to be more specific
  • Provide clearer sample message templates
  • Resubmit with corrections
Pro Tip: Be very specific in your campaign description. Instead of “marketing messages,” say “appointment reminders and booking confirmations for dental practice patients.”
Problem: SMS messages are still slow even after A2P approval.Solutions:
  • Verify your phone number is actually assigned to the approved campaign
  • Check campaign status—it may show “approved” but still be processing
  • Allow 24-48 hours after approval for full throughput to activate
  • Review your campaign’s assigned throughput tier (some use cases get lower limits)
  • Contact Twilio if throttling persists beyond 48 hours

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Next Steps

Voice Agents

Set up voice agents to handle your calls

Chat Agents

Set up SMS responses with chat agents