What is Power Trunk?
Learn what Power Trunk is, what you can do with it, and how to connect your business phone numbers to your PBX, third-party apps, AI agents, and call recording.
Written by B3Networks Academy
Updated at November 12th, 2026
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Power Trunk is a cloud voice application in the portal that lets you connect your business fixed-line and toll-free phone numbers to a SIP PBX or a third-party calling app, and add an AI voice agent or compliance call recording from one screen.
What you can do with Power Trunk
| Capability | What it does | Learn more |
|---|---|---|
| Connect a SIP PBX or SBC | Route calls between your phone numbers and your office IP-PBX or Session Border Controller using SIP Account credentials or static IP Peering, with automatic 2-zone High Availability. | Connect to a SIP PBX or third-party app |
| Connect a third-party calling app | Route calls directly to an approved cloud calling platform (such as Microsoft Teams, Zoom Phone, Cisco Webex, or Genesys) without managing SIP hardware. | Connect to a SIP PBX or third-party app |
| Add an AI Voice Agent | Let an AI voice assistant (AgentDuet) answer incoming calls 24/7, handle common questions, or transfer callers to your connected PBX or app. | Configure AI Voice Agent and Call Recording |
| Record calls for compliance | Automatically record calls using B3 Own Recording or stream call audio to an external SIPREC recording server (such as ASC or Touch Suite). | Configure AI Voice Agent and Call Recording |
| Manage call rules, numbers & team access | Set your Main Trunk Number, apply inbound and outbound call rules, and grant specific team members access to manage a trunk. | Manage Call Rules, Numbers & Admin Access |
Explore the Power Trunk interface
When you open Power Trunk in the portal, you can review your connected application, trunk details (Label, Subscription UUID, Concurrent Sessions, and Numbers), and configure your trunk settings on a single page: