Network Settings for Reliable Calling in GC Gift Officer (VOIP)

GC GIFT OFFICER • IT SETUP GUIDE FOR VOIP CALLING

GC Gift Officer uses Twilio as the underlying infrastructure for VoIP calling. To ensure users get clear, reliable calls, your IT team should consider explicitly whitelisting outbound traffic to Twilio’s network.

This one-pager covers the settings on your network to configure for smooth outbound call initiation via GC Gift Officer.

Recommended Settings

To ensure reliable call quality and connectivity, we recommend that schools’ IT teams configure their firewalls to allow outbound traffic to Twilio’s infrastructure. The suggested settings are below.

Setting Value

IP range to allowlist 168.86.128.0/18

UDP ports 10000–60000

TCP port 443

Bandwidth Each call typically requires 24–100 kbps per direction.

Domains Twilio signaling and media servers - the documentation linked below includes the full list of possible signaling and media servers.

Official Twilio Documentation

Twilio Voice SDKs: Network Connectivity Requirements includes the complete list of IPs, ports, and firewall best practices, practices.