BYOC (Bring Your Own Carrier)

BYOC (Bring Your Own Carrier) is a deployment model in which you connect your existing telecom carrier to a voice AI platform — typically over SIP trunking — instead of using the platform’s bundled, resold telephony. The platform handles the AI conversation; your carrier keeps handling the calls. You retain your carrier contracts and negotiated per-minute rates, your existing DID numbers, your routing and failover control, and the regulatory compliance attached to your carrier relationship.

The trunk is established either by IP authentication (each side allowlists the other’s signaling addresses) or SIP registration (credential-based, like a SIP phone), ideally with TLS signaling and SRTP media encryption. Once connected, inbound calls to your DIDs flow over the trunk to AI agents, and outbound calls leave through your carrier with your numbers as caller ID.

Why it matters for voice agents

Most voice AI platforms resell telephony (usually Twilio) with a markup, which works for US pilots but breaks down in three common situations. International traffic: platform-resold rates to many countries run 5–20x what a regional carrier charges, and DIDs in some markets aren’t available through resellers at all. Regulated industries: healthcare, finance, and public-sector deployments often have compliance requirements — recording jurisdiction, data residency, emergency-services registration — already satisfied by an existing carrier agreement; BYOC preserves that continuity rather than rebuilding it inside a vendor’s subaccount. Existing number inventory: companies with hundreds of established DIDs avoid a risky porting project entirely.

Platform support varies more than vendors admit. Some treat BYOC as an enterprise-tier afterthought; some are effectively locked to a single upstream (Bland’s “bring your own” means bringing a Twilio account); and several charge a per-minute SIP surcharge on BYOC traffic — taxing you for not using their telephony. When evaluating, ask whether BYOC is available on every plan, whether there’s a surcharge, and which auth methods and codecs are supported. For a full walkthrough, see our BYOC guide for voice AI.

Related terms

• SIP Trunking — the transport mechanism BYOC runs on
• DID Number — the number inventory BYOC lets you keep
• Warm Transfer — escalation flows that traverse your trunk