Voice ports for SIP traffic

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The following ports should be allowed to and from the Session Border Controller addresses:

• TCP 1720-1728
• UDP 5060, 5061
• TCP 5060, 5061
• UDP 1024 and greater

Session Border Controllers:

• ATL: 204.16.53.4
• JFK: 204.16.57.4
• LAS: 204.14.39.36
• ORD: 204.16.49.4

As for other services which could be used for phone configuration and firmware upgrades, those can and will change and are dependent upon the endpoints. We currently use:

• FTP
• HTTP
• HTTPS
• TFTP

Our preferred method is HTTPS, but as of right now, only the Sipuras and Linksys support it. Of these protocols, the only one which a company is likely to block outbound is TFTP. Even that is not very common for sessions initiated from the local LAN.