LAUNCHTelephony

Synthflow SIP trunking network guidelines

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When you connect your PBX directly to Synthflow over SIP, your network must allow outbound traffic to our signalling endpoints and bidirectional RTP to our media pool addresses. Use the tables below to configure ACLs on your firewalls.

Synthflow operates three regions: Global, US, and EU. Your SIP trunk must point to the region that matches your workspace. You can find your workspace region in your account settings. Only allow-list the signalling and media addresses for your region.

Ports and transports

TrafficProtocolPort rangePurpose
SIP signallingUDP, TCP32681SIP over UDP/TCP
SIP signallingTLS32682SIP over TLS
Media (RTP)UDP10000–60000RTP/RTCP between your network and Synthflow media nodes

Point your SIP traffic toward the SIP FQDN (for automatic failover and maintenance exclusion) for your region. Also allow the media UDP range toward all media IPs listed for that region.

To find which region you reside in, open Admin → Workspace Settings → Preferences and check Customer Region.

Region addresses

Signalling

FQDNIP (allow list)UDPTCPTLS
sip.synthflow.ai34.138.86.8/32, 34.75.151.191/32, 34.23.45.239/32, 35.231.28.238/32326813268132682

Media — allow UDP 10000–60000 to each address:

Media IP
34.73.190.14
35.237.117.4
34.148.74.207
34.139.134.58
34.73.14.16
34.139.114.28

LATAM media

US-region workspaces can send and receive RTP through Synthflow’s Latin America media nodes. If your workspace is in the US region, allow UDP 10000–60000 to each of these addresses in addition to the US media IPs above. Global and EU workspaces do not need these addresses.

Media IP
34.51.27.23
34.51.92.73