AnchorSite Configuration

Configure AnchorSite to control which Telnyx PoP handles media routing for SIP calls, with latency-based and manual selection modes.

AnchorSite determines which Telnyx Point of Presence (PoP) handles media routing for SIP calls.

Configuration modes

Latency mode

Automatically selects the optimal PoP based on ICMP ping latency measurements to the SIP endpoint.

Requirements:

• IP/FQDN authentication: Whitelist Telnyx media IP addresses for ICMP.
• Credential authentication: Include username in Contact header or X-Telnyx-Username header:

Contact: <sip:user@192.0.2.10:5060>
X-Telnyx-Username: connection_username

• TeXML: PoP selected based on latency to webhook URL IP.

Manual mode

Explicitly select a PoP for predictable routing behavior.

Available PoPs:

Value	Location
Chicago, IL	North America Central
Ashburn, VA	North America East
San Jose, CA	North America West
Toronto, Canada	North America Northeast
Montreal, Canada	North America Northeast
Vancouver, Canada	North America Northwest
London, UK	Europe West
Amsterdam, Netherlands	Europe
Frankfurt, Germany	Europe Central
Sydney, Australia	Asia Pacific

Configuration

You can configure AnchorSite in the Telnyx Portal by editing an IP Connection:

PATCH /v2/ip_connections/:

{
  "anchorsite_override": "latency"
}

For manual selection:

{
  "anchorsite_override": "Chicago, IL"
}

Failover

If the selected PoP is unavailable (maintenance, outage, health check failure), calls automatically reroute through the next available PoP.