White Label AI Telephony Requirements: What Agencies Need Before Reselling Voice AI

White label AI telephony requires SIP trunking support, number porting capabilities, carrier-grade reliability, and call routing flexibility to deliver professional voice AI services to your clients.

Agencies entering the voice AI reseller market face a critical decision: which platform's telephony infrastructure will power their client deployments? The wrong choice creates support nightmares, quality issues, and client churn. The right choice builds a foundation for scalable recurring revenue.

Which Trillet product is right for you?

• Small businesses: Trillet AI Receptionist - 24/7 call answering starting at $29/month

• Agencies: Trillet White-Label - Studio $99/month or Agency $299/month (unlimited sub-accounts)

What Telephony Infrastructure Does White Label Voice AI Require?

Voice AI platforms need robust telephony infrastructure to handle real-world call volumes with carrier-grade quality. The core requirements include SIP trunk connectivity, number provisioning, call routing logic, and failover systems.

Most agencies underestimate telephony complexity. A platform might have impressive AI capabilities but fall apart when clients need to port existing numbers, handle high call volumes during peak hours, or route calls across multiple locations.

Core telephony components agencies should evaluate:

• SIP trunk integration: Direct carrier connections vs. third-party providers (affects latency and cost)

• Number provisioning: Local, toll-free, and international number availability

• Number porting: Process for transferring existing client numbers to the platform

• Call routing: Conditional forwarding, time-based routing, geographic routing

• Failover systems: What happens when the primary system goes down

• Concurrent call capacity: How many simultaneous calls the platform supports

How Do SIP Trunk Requirements Differ Between Platforms?

SIP (Session Initiation Protocol) trunks connect voice AI platforms to the public telephone network. The quality and configuration of these connections directly impacts call quality, latency, and reliability.

Wrapper platforms like VoiceAIWrapper depend on underlying providers (Vapi, Retell) for telephony infrastructure. While voice calls route directly through the provider without additional latency, this creates dependency on external infrastructure. When Vapi or Retell experiences issues, VoiceAIWrapper agencies feel the impact with no ability to route around the problem.

Native platforms like Trillet control their telephony stack, enabling faster troubleshooting and more predictable performance. For agencies building a long-term business, this control matters.

What Number Porting Capabilities Should Agencies Require?

Clients rarely want new phone numbers. They have existing numbers on business cards, websites, Google Business profiles, and marketing materials. A platform that makes number porting difficult creates friction in every client onboarding.

Number porting checklist for agencies:

1. Porting timeline: How long does the transfer take? (Industry standard: 7-10 business days for US numbers)

2. Number type support: Can you port toll-free, local, and vanity numbers?

3. Partial porting: Can clients port some numbers while keeping others with current carrier?

4. Port-out process: What happens if a client leaves? Is the number trapped?

5. International numbers: Does the platform support porting numbers outside your primary market?

6. Porting fees: Some platforms charge $10-50 per number ported

Trillet supports number porting across major carriers in the US and Australia, with typical completion within 7-10 business days. The Agency plan includes porting support through dedicated Slack channels, helping agencies troubleshoot carrier-specific issues.

How Should Agencies Evaluate Call Routing Flexibility?

Different clients have different routing needs. A dental practice wants after-hours calls handled differently than daytime calls. A multi-location business needs geographic routing. A law firm wants certain call types transferred to specific attorneys.

Essential call routing features:

• Time-based routing: Different handling for business hours vs. after-hours vs. weekends

• Conditional forwarding: Route based on caller input, caller ID, or AI-detected intent

• Geographic routing: Direct calls to appropriate locations based on caller area code

• Overflow routing: What happens when the AI is unavailable or caller requests human

• Priority routing: VIP caller detection and special handling

• Sequential routing: Try primary number, then backup, then voicemail

Trillet's platform includes configurable call forwarding rules that agencies can customize per client. This includes integration with existing phone systems through conditional call forwarding, allowing clients to keep their current numbers and use Trillet as overflow or after-hours backup. See the call forwarding setup guide for carrier-specific instructions.

What Concurrent Call Capacity Do Agencies Need?

Concurrent call capacity determines how many simultaneous calls your clients can handle. Underestimate this, and callers get busy signals during peak hours. Overestimate, and you pay for capacity you don't use.

Capacity considerations by client type:

VoiceAIWrapper caps concurrent calls at 30 lines maximum, which can limit agencies targeting larger clients. Synthflow's pricing tiers (5/25/50/80 concurrent calls) force agencies to upgrade plans as clients grow.

Trillet's architecture supports unlimited concurrent calls with automatic scaling. Agencies pay per minute ($0.09/minute on the Agency plan) rather than per concurrent line, making costs more predictable as client bases grow.

How Do Telephony Costs Impact Agency Margins?

Telephony costs often surprise agencies. The platform subscription is just the beginning. Per-minute rates, number fees, and carrier charges add up.

Typical telephony cost breakdown:

At $0.09/minute, Trillet offers the lowest per-minute rate in the agency market. This translates to better margins when reselling to clients. An agency charging clients $0.25/minute achieves 64% margin on Trillet vs. 52% margin on Synthflow.

For detailed margin calculations, see the white label AI chatbot ROI calculator.

What Failover and Redundancy Should Agencies Expect?

When telephony systems fail, client businesses lose calls and revenue. Agencies need platforms with robust failover systems and clear SLAs.

Failover requirements checklist:

• Geographic redundancy: Servers in multiple data centers

• Carrier redundancy: Multiple SIP trunk providers

• Automatic failover: Seamless switchover when primary systems fail

• Failover routing: Send calls to backup numbers during outages

• Uptime SLA: Guaranteed availability with financial penalties for breaches

• Incident communication: How does the platform notify agencies of issues?

Trillet maintains carrier-grade reliability with automatic failover systems. The Enterprise tier includes financially guaranteed 99.99% uptime SLAs, translating to less than 52 minutes of downtime per year.

What Integration Points Matter for Telephony?

Voice AI platforms don't operate in isolation. They need to integrate with CRM systems, calendars, and existing business tools. The quality of these integrations determines how much value agencies can deliver.

Critical telephony integrations:

• CRM connectivity: Push call data and transcripts to HubSpot, GoHighLevel, Salesforce

• Calendar systems: Book appointments directly during calls (Google Calendar, Outlook, Calendly)

• PBX integration: Connect with existing phone systems without replacing infrastructure

• Webhook support: Real-time event notifications for custom workflows

• API access: Build custom integrations for unique client needs

Trillet provides native integrations with major CRM platforms and calendar systems. The platform also supports PBX integration for clients with existing phone infrastructure, and MCP server integration for advanced workflow automation.

How Do Compliance Requirements Affect Telephony Choices?

Different industries have different telephony compliance requirements. Healthcare needs HIPAA. Financial services need call recording disclosures. Australian businesses need ACMA compliance.

Compliance considerations by industry:

Trillet includes compliance tools for HIPAA, GDPR, TCPA, ACMA, and DNCR at no additional cost. ChatDash charges $200/month extra for HIPAA compliance. For agencies serving regulated industries, this included compliance can be a significant differentiator.

For more on compliance, see voice AI compliance requirements 2026.

Frequently Asked Questions

What is SIP trunking and why does it matter for voice AI?

SIP trunking connects voice AI platforms to the telephone network. It affects call quality, latency, and cost. Native SIP integration typically delivers better quality than platforms that rely on third-party providers.

Can clients keep their existing phone numbers when switching to voice AI?

Yes, most voice AI platforms support number porting. The process typically takes 7-10 business days and requires a Letter of Authorization from the current carrier. Some platforms charge porting fees while others include it in agency plans.

How many concurrent calls should agencies plan for?

Plan based on client mix. Solo practitioners rarely need more than 2 concurrent lines. Multi-location businesses may need 10-20. Platforms with per-line pricing can force expensive upgrades as clients grow.

Which Trillet product should I choose?

If you're a small business owner looking for AI call answering, start with Trillet AI Receptionist at $29/month. If you're an agency wanting to resell voice AI to clients, explore Trillet White-Label—Studio at $99/month (up to 3 sub-accounts) or Agency at $299/month (unlimited sub-accounts).

What happens if the voice AI platform goes down?

Quality platforms include automatic failover to backup systems. Agencies should verify uptime SLAs (look for 99.9% minimum), understand the failover architecture, and confirm how they'll be notified of outages.

Do agencies need to understand telephony technology?

Basic understanding helps with client conversations and troubleshooting. However, platforms like Trillet abstract most complexity, providing agency resources and Slack support to handle technical issues.

Conclusion

Telephony infrastructure determines whether your voice AI agency scales smoothly or struggles with technical issues. Prioritize platforms with native SIP integration, flexible number porting, unlimited concurrent calls, and predictable per-minute pricing.

Trillet's Agency plan at $299/month provides unlimited sub-accounts with $0.09/minute pricing, included compliance tools, and dedicated Slack support for telephony troubleshooting. For agencies serious about building a voice AI business, these telephony fundamentals create the foundation for long-term success.

Explore Trillet White-Label pricing to see how the telephony infrastructure compares for your agency's needs.

Related Resources:

• White-Label Voice AI Platform Guide for Agencies

• Voice AI Compliance Requirements 2026

• How to Set Up Call Forwarding in Australia