Your Telnyx AI Voice Agents can now register as a SIP endpoint directly on your existing voice infrastructure. Internal callers reach the agent by dialing an extension, the same way they reach any other team member. Calls stay on-net.
Most enterprise voice traffic lives behind a PBX, softswitch, or unified communications platform. Until now, connecting an AI Voice Agent to that infrastructure meant routing through the PSTN. Calls left the corporate network, traversed the public phone network, and came back. That added latency, required DID provisioning, and exposed internal traffic to a public network for no operational reason.
SIP Attach removes the PSTN leg. The agent registers as a SIP endpoint inside your voice system. Internal users dial an extension, the agent picks up, and STT, LLM, and TTS run end to end on Telnyx.
This unlocks employee-facing voice agents at scale. IT helpdesks, HR support, internal operations, and employee directories: the larger half of the voice agent market.
Check out the support documents to learn more.
